Mostly Unpublished NES Cheats ;)

red    marked cheats are unique, not listed on any site (tell me if not).
brown marked cheats from various other sources like gamefaqs.com etc, checked and fixed if necessary.
gray   marked disabled or missed cheats buried inside game ROM.

  83-in-1 [p1][!], 100-in-1 (MG109) [p1][!]
  150-in-1 [p1][!], 200-in-1 - Elfland (Unl)[U][!]
  Super HIK 300-in-1 1994 [p1][!], 9999-in-1 [p1][!], 9999999-in-1 [p1], 10000000-in-1 [p1][!]
  Coolboy 198-in-1, Coolboy 400-in-1
  '89 Dennou Kyuusei Uranai
  100 Man $ Kid - Maboroshi no Teiou Hen, Casino Kid
  Taiwan Mahjong 16, Tai Wan Ma Que 16
  1943
  1999 - Hore Mitakotoka! Seikimatsu
  3D Block
  4 Nin Uchi Mahjong
  6-in-1 (Caltron, HES)
  720
  8 Eyes
  AV Jiu Ji Ma Jiang 2
  AV Mahjongg
  AV Hanafuda Club
  AV Pachi-Slot, Hot Slot
  AV Poker (Hacker), Peek-A-Boo Poker (Panesian)
  AV Pretty Girl Fighting, AV Mei Shao Nv Zhan Shi
  AV Soccer, Ultimate League Soccer, Fuetball
  Aa Yakyuu Jinsei Icchokusen
  Abadox
  Abarenbou Tengu, Zombie Nation
  Aces - Iron Eagle 3, Ultimate Air Combat
  Action in New York, Final Mission, SCAT - Special Cybernetic Attack Team
  Addams Family, The
  Addams Family, The - Pugsley's Scavenger Hunt
  Advanced Dungeons & Dragons - Dragon Strike
  Advanced Dungeons & Dragons - Heroes of the Lance
  Adventures in the Magic Kingdom
  Adventures of Bayou Billy, The, Mad City
  Adventures of Captain Comic, The
  Adventures of Dino Riki, The, Shin Jinrui - The New Type
  Adventures of Lolo (US)
  Adventures of Lolo 2 (US), Adventures of Lolo (Japan)
  Adventures of Lolo 3 (US), Adventures of Lolo 2 (Japan)
  Adventures of Rocky and Bullwinkle and Friends, The
  Adventures of Tom Sawyer, Tom Sawyer no Bouken
  After Burner, After Burner II
  Ai Senshi Nicol (FDS)
  Ai Sensei no Oshiete - Watashi no Hoshi
  Aigiina no Yogen - From The Legend of Balubalouk
  Air Fortress
  Airwolf (Japan)
  Airwolf (US)
  Akumajou Densetsu, Castlevania III - Dracula's Curse
  Akumajou Special - Boku Dracula-kun
  Aladdin
  Aladdin I/II/4 (JY Company), Popeye 2 - Travels in Persia
  Aladdin 3, Magic Carpet 1001
  Alien 3
  Alien Syndrome
  All-Pro Basketball, Zenbei!! Pro Basket
  Alpha Mission, ASO - Armored Scrum Object
  American Dream
  Ankoku Shinwa - Yamato Takeru Densetsu
  Antarctic Adventure
  Arabian Dream Scheherazade, Magic of Scheherazade, The
  Argos no Senshi, Rygar
  Argus
  Arkanoid
  Arkanoid 2
  Artelius
  Asterix
  Astro Fang - Super Machine
  Astyanax, Lord of King, The
  Atlantis no Nazo
  Attack Animal Gakuen
  Attack of the Killer Tomatoes
  B-Wings
  Babel no Tou
  Baby Boomer
  Back to the Future
  Back to the Future II & III
  Bad Dudes, Bad Dudes vs Dragon Ninja, Dragon Ninja
  Bad News Baseball, Gekitou Stadium!!
  Bakushou! Star Monomane Shitennou
  Bakushou!! Jinsei Gekijou 2
  Banana
  Banana Prince, Bananan Ouji no Daibouken
  Barbie
  Bard's Tale, The - Tales of the Unknown
  Bard's Tale II, The - The Destiny Knight
  Baseball Simulator 1.000, Choujin - Ultra Baseball
  Baseball Star - Mezase Sankanou!!, Baseball Stars
  Bases Loaded 3, Moe Pro! '90 - Kandou Hen
  Bases Loaded 4, Moe Pro! - Saikyou Hen
  Batman - Return of the Joker, Dynamite Batman
  Batman Returns
  Batsu & Terii
  Battle Baseball
  Battle City
  Battle Fleet
  Battle Formula, Super Spy Hunter
  Battle Stadium - Senbatsu Pro Yakyuu
  Battle Storm
  Battleship
  Battletoads
  Battletoads & Double Dragon - The Ultimate Team
  Beauty and the Beast
  Bee 52
  Beetlejuice
  Best Keiba - Derby Stallion
  Best Play Pro Yakyuu
  Best Play Pro Yakyuu '90
  Best Play Pro Yakyuu Special
  Best Play Pro Yakyuu II
  Best of the Best - Championship Karate
  Bible Buffet
  Big Nose Freaks Out
  Big Nose the Caveman
  Bikkuri Nekketsu Shin Kiroku! - Harukanaru Kin Medal, Crash 'n the Boys - Street Challenge
  Bill Elliott's NASCAR Challenge
  Binary Land
  Bing Kuang Ji Dan Zi - Flighty Chicken
  Bio Hazard
  Bio Miracle Bokutte Upa
  Bionic Commando, Hitler no Fukkatsu - Top Secret
  Black Bass 2, The, Black Bass USA, The
  Black Bass, The
  Blaster Master, Chou-Wakusei Senki - MetaFight
  Blodia Land - Puzzle Quest
  Blue Marlin, The
  Blue Shadow, Kage, Shadow of the Ninja
  Blues Brothers, The
  Bo Jackson Baseball
  Bokosuka Wars
  Bomber King, Robo Warrior
  Bomberman
  Bomberman II, Dynablaster
  Bonk's Adventure, FC Genjin - Freakthoropus Computerus
  Booby Kids
  Boogerman
  Boy and His Blob, A - Trouble on Blobolonia, Fushigi na Blobby - Blobania no Kiki
  Bram Stoker's Dracula
  Break Time - The National Pool Tour
  Bucky O'Hare
  Buggy Popper, Bump'n'Jump
  Bugs Bunny Birthday Bash, Bugs Bunny Birthday Blowout, The, Happy Birthday Bugs
  Bugs Bunny Crazy Castle, The, Bugs Bunny Fun House
  Burai Fighter
  Buzz and Waldog (USA), Ko Ko Eo Deu Ben Ce (Korea)
  Cadillac
  California Games
  Capcom Barcelona '92, Gold Medal Challenge '92
  Captain America and The Avengers
  Captain Ed
  Captain Planet and The Planeteers
  Captain Saver, Power Blade 2
  Captain Skyhawk
  Captain Tsubasa, Tecmo Cup - Soccer Game, Tecmo Cup - Football Game
  Captain Tsubasa Vol. II - Super Striker
  Castelian, Kyoro Chan Land
  Castle Excellent, Castlequest
  Castle Quest
  Castle of Deceit
  Castle of Dragon, Dragon Unit
  Castlevania II - Simon's Quest
  Caveman Ninja, Joe & Mac
  Challenge of the Dragon (Color Dreams)
  Challenger
  Championship Bowling
  Championship Pool
  Chaos World
  Chess Academys
  Chessmaster, The
  Chester Field - Ankoku Shin heno Chousen
  Chiki Chiki Machine Mou Race, Wacky Races
  Chiller
  Chinese Odyssey, A, Da Hua Xi You
  Chip's Challenge (Prototype)
  Chitei Senkuu Vazorudaa, Wurm
  Chou Hen, Galactic Crusader, Papillion
  Choujin Sentai - Jetman
  Chu Da D
  Chu Han Zheng Ba - The War Between Chu & Han
  Chubby Cherub, Obake no Q Tarou - Wanwan Panic
  Chuugoku Janshi Story - Tonpuu
  Chuugoku Senseijutsu
  Chuuka Taisen
  Circus Caper
  City Adventure Touch - Mystery of Triangle
  Clash at Demonhead, Dengeki - Big Bang!
  Cliffhanger
  Clu Clu Land
  Columbus - Ougon no Yoake
  Commando, Senjou no Ookami
  Conflict
  Conquest of the Crystal Palace, Matendouji
  Contra, Probotector, Contra 1993, Super Contra II
  Cool World
  Corvette ZR-1 Challenge, Race America
  Cosmic Epsilon
  Cosmic Wars
  Cosmo Police Galivan
  Cosmos Cop
  Crackout
  Creatom
  Crisis Force
  Cross Fire
  Crystal Mines
  Crystalis, God Slayer - Haruka Tenkuu no Sonata
  Cyberball
  Cycle Race - Road Man
  Dai Meiro - Meikyuu no Tatsujin
  Dai-2-Ji - Super Robot Taisen
  Daikaijuu Deburas
  Daiku no Gen San, Hammerin' Harry
  Daiku no Gen San 2 - Akage no Dan no Gyakushuu
  Daisenryaku
  Daiva - Imperial of Nirsartia
  Dalton McGuinty's Kids' Computer Game, M.C. Kids
  Dancing Blocks
  Darkman
  Dash Galaxy in the Alien Asylum
  Datach - Battle Rush - Build Up Robot Tournament
  Datach - Dragon Ball Z - Gekitou Tenkaichi Budou Kai
  Datach - J League Super Top Players
  Datach - Ultraman Club - Supokon Fight!
  Datach - Yuu Yuu Hakusho - Bakutou Ankoku Bujutsu Kai
  Datsugoku, POW - Prisoners of War
  Day Dreamin' Davey
  Days of Thunder
  Deadly Towers, Mashou
  Deathbots
  Deep Dungeon 3 - Yuushi heno Tabi
  Deep Dungeon 4 - Kuro no Youjutsushi
  Defender II, Star Gate
  Demogorgon Monk
  Demon Sword, Fudou Myouou Den
  Densetsu no Kishi - Elrond, Wizards & Warriors
  Derby Stallion - Zenkoku Han
  Destination Earthstar
  Destiny of an Emperor, Tenchi wo Kurau
  Dezaemon
  Diablo (Nanjing)
  Die Hard
  Dig Dug
  Dig Dug II
  Digger - The Legend of the Lost City, Digger T. Rock - The Legend of the Lost City
  Digital Devil Monogatari - Megami Tensei
  Digital Devil Monogatari - Megami Tensei II
  Dirty Harry
  Dizzy The Adventurer
  Doki! Doki! Yuuenchi, Trolls in Crazyland, The
  Dokuganryuu Masamune
  Don Doko Don
  Don Doko Don 2
  Donald Land
  Dong Dong Nao II - Guo Zhong Ying Wen
  Donkey Kong Country 4
  Doraemon
  Doraemon (Waixing)
  Double Dragon II - The Revenge
  Double Dragon III - The Rosetta Stone, Double Dragon III - The Sacred Stones
  Double Moon Densetsu
  Double Strike, Twin Eagle (Sachen), Shuang Ying (Joy Van)
  Dough Boy
  Downtown - Nekketsu Koushin Kyoku - Soreyuke Daiundoukai
  Downtown - Nekketsu Monogatari, River City Ransom, Street Gangs
  Downtown Special - Kunio-kun no Jidaigeki Dayo Zenin Shuugou!
  Dr. Jekyll and Mr. Hyde, Houma ga Toki
  Dr. Mario
  Dragon Ball - Dai Maou Fukkatsu
  Dragon Ball, Dragon Ball - Shen Long no Nazo, Dragon Power
  Dragon Ball 3 - Gokuu Den
  Dragon Ball Z - Kyoushuu! Saiya Jin
  Dragon Ball Z II - Gekishin Freeza!!
  Dragon Ball Z III - Ressen Jinzou Ningen
  Dragon Buster
  Dragon Buster II - Yami no Fuuin
  Dragon Fighter (Sofel)
  Dragon Fighter (Flying Star, Unlicensed)
  Dragon Quest, Dragon Warrior
  Dragon Quest II, Dragon Warrior II
  Dragon Quest III, Dragon Warrior III
  Dragon Quest IV, Dragon Warrior IV
  Dragon Scroll - Yomigaerishi Maryuu
  Dragon Slayer 4 - Drasle Family, Legacy of the Wizard
  Dragon Spirit - Aratanaru Densetsu, Dragon Spirit - The New Legend
  Dragon's Lair
  Dragon, The
  Dream Master
  Dreamworld Pogie (Codemasters, Prototype)
  Drop Zone
  Duck Tales, Wanpaku Duck Yume Bouken
  Duck Tales 2
  Dungeon & Magic - Swords of Element
  Dusty Diamond's All-Star Softball, Softball Tengoku
  Dynamite Bowl
  Dynowarz - Destruction of Spondylus
  Earth Worm Jim 2 (Shin-Shin)
  Earth Worm Jim 2 (Super Game)
  Earth Worm Jim 3
  Eggland - Meikyuu no Fukkatsu
  Egypt
  Eliminator Boat Duel
  Elite
  Elysion
  Emoyan no 10 Bai Pro Yakyuu
  Erika to Satoru no Yume Bouken
  Erunaaku no Zaihou
  Escape From Atlantis
  Esper Dream 2 - Aratanaru Tatakai
  Exciting Boxing
  Exodus
  F-1 Sensation, Formula 1 Sensation
  F-117A Stealth Fighter
  F-15 City War
  F-15 Strike Eagle
  F1 Circus
  Famicom Disk System BIOS
  FamicomBox
  Famicom Jump - Eiyuu Retsuden
  Famicom Jump II - Saikyou no 7 Nin
  Famicom Meijin Sen
  Famicom Shougi - Ryuuousen
  Famicom Top Management
  Famicom Wars
  Family BASIC, Playbox BASIC
  Family Boxing, Ring King
  Family Circuit
  Family Circuit '91
  Family Computer - Othello, Othello
  Family Jockey
  Family Mahjong II - Shanghai heno Michi
  Family Pinball, Rock 'n' Ball
  Family Quiz
  Family School
  Family Tennis
  Family Trainer - Athletic World, Athletic World
  Family Trainer - Jogging Race
  Famista '89 - Kaimaku Han!!
  Famista '90
  Famista '91
  Famista '92
  Famista '93
  Famista '94
  Fantastic Adventures of Dizzy, The
  Fantasy Zone (SunSoft)
  Fantasy Zone (Tengen)
  Fantasy Zone 2 - The Teardrop of Opa-Opa
  Faria - A World of Mystery and Danger!, Faria
  Felix the Cat (Dragon Co., TomSoft)
  Fighting Golf, Lee Trevino's Fighting Golf
  Fighting Hero (Unl)
  Fighting Hero III
  Fighting Road
  Final Combat
  Final Fantasy
  Final Fantasy III
  Final Fantasy V (Mars)
  Final Fight 3
  Fire 'n Ice, Solomon no Kagi 2 - Coolmin Tou Kyuushutsu Sakusen, Solomon's Key 2
  Fire Emblem
  Fire Emblem Gaiden
  Fire Hawk
  Flappy
  Flintstones, The - The Rescue of Dino & Hoppy
  Flintstones, The - The Surprise at Dinosaur Peak!
  Flipull - An Exciting Cube Game
  Flying Hero
  Flying Warriors, Hiryuu no Ken II - Dragon no Tsubasa
  Fong Shen Bang - Zhu Lu Zhi Zhan
  Four Players Tennis, Top Players' Tennis - Featuring Chris Evert & Ivan Lendl, World Super Tennis
  Free Fall, Sunday Funday (Wisdom Three)
  Freedom Force
  Fushigi no Umi no Nadia
  Fuzzical Fighter
  G.I. Joe
  G.I. Joe - The Atlantis Factor
  Galaga
  Galaxian
  Galaxy 5000
  Gambler Jiko Chuushin Ha - Mahjong Game
  Gambler Jiko Chuushin Ha 2
  Game Party
  Ganbare Goemon Gaiden - Kieta Ougon Kiseru
  Ganbare Goemon! - Karakuri Douchuu
  Ganbare Pennant Race!
  Ganso Saiyuuki - Super Monkey Daibouken
  Garfield - A Week of Garfield
  Gargoyle's Quest II - The Demon Darkness, Red Ariimaa 2
  Gauntlet
  Gegege no Kitarou - Youkai Dai Makyou, Ninja Kid
  Gegege no Kitarou 2 - Youkai Gundan no Chousen
  Geimos
  Gekitotsu Yonku Battle
  Gekitou Pro Wrestling!! - Toukon Densetsu, Tecmo World Wrestling
  Genpei Touma Den - Computer Boardgame
  Getsufuu Maden
  Ghostbusters II
  Ghosts'n Goblins, Makai-Mura
  Ghoul School
  Gilligan's Island
  Gimmi a Break - Shijou Saikyou no Quiz Ou Ketteisen
  Gimmick!, Mr. Gimmick
  Goal! 2, Goal! Two, Goal!!
  Godzilla - Monster of Monsters!, Godzilla
  Golf '92, The
  Golf Club - Birdy Rush
  Golgo 13 - Dai 1 Shou - Kamigami no Tasogare, Golgo 13 - Top Secret Episode
  Golgo 13 - The Riddle of Icarus, Mafat Conspiracy - Golgo 13
  Goonies, The
  Goonies II, The - Fratelli Saigo no Chousen, Goonies II, The
  Gozonji - Yaji Kita Chin Douchuu
  Gradius
  Gradius II
  Grand Master
  Great Battle Cyber
  Great Deal
  Great Tank, Iron Tank
  Great Waldo Search, The
  Great Wall, The (Sachen)
  Greg Norman's Golf Power
  Gremlin 2 - Shinshu Tanjou, Gremlins 2 - The New Batch
  Guerilla War, Guevara
  Guardian Legend, The, Guardic Gaiden
  Gun Nac
  Gun Sight, Laser Invasion
  Gun-Dec, Vice - Project Doom
  Gun.Smoke
  Gyrodine
  Gyromite
  Gyruss
  Hacker, The (Nanjing, NJ032)
  Hana no Star Kaidou
  Hanafuda Yuukyou Den - Nagarebana Oryuu
  Hanjuku Eiyuu
  Happy Camper
  Happily Ever After (Prototype)
  Harry's Legend, Titenic
  Hatris
  Heavy Barrel
  Heavy Shreddin', Snowboard Challenge
  Hector 87, Starship Hector
  Heisei Tensai Bakabon
  Hell Fighter (Sachen)
  Hello Kitty World
  Hero on Devil Lands (Waixing)
  Hi no Tori - Houou Hen - Gaou no Bouken
  Higemaru Makaijima - Nanatsu no Shima Daibouken, Makai Island
  High Speed
  Highway Star, Rad Racer
  Hiryuu no Ken III - 5 Nin no Ryuu Senshi
  Hiryuu no Ken Special - Fighting Wars
  Hissatsu Doujou Yaburi
  Hissatsu Shigoto Nin
  Hit Marmot
  Hit the Ice
  Hokkaidou Rensa Satsujin - Ohotsuku ni Kiyu
  Hokuto no Ken
  Hokuto no Ken 2 - Seikimatsu Kyuuseishu Densetsu, Fist of the North Star
  Holy Diver
  Home Alone
  Home Alone 2 - Lost in New York
  Home Run Nighter '90 - The Pennant League
  Honoo no Doukyuuji - Dodge Danpei
  Honoo no Doukyuuji - Dodge Danpei 2
  Hook
  Hoshi no Kirby - Yume no Izumi no Monogatari, Kirby's Adventure
  Hoshi o Miru Hito
  Hototogisu
  Hottaaman no Chitei Tanken
  Hu Lu Jin Gang (Nanjing, NJ039)
  Huan Shi Lu (Nanjing, NJ034)
  Huang Di
  Huang Jin Tai Yang (Nanjing)
  Hudson Hawk
  Hudson's Adventure Island, Takahashi Meijin no Bouken Shima
  Hudson's Adventure Island II, Takahashi Meijin no Bouken Shima II
  Hudson's Adventure Island III, Takahashi Meijin no Bouken Shima III
  Huge Insect
  Hunt for Red October, The
  HVC Kensa Cassette Controller Test
  Hydlide, Hydlide Special
  Hydlide 3 - Yami Kara no Houmonsha
  Hyokkori Hyoutan Shima - Nazo no Kaizokusen
  Hyper Olympic, Hyper Sports, Hyper Olympic Genteiban!, Track & Field, Track & Field in Barcelona
  I Love Softball
  Ice Hockey
  Ide Yousuke Meijin no Jissen Mahjong
  Ide Yousuke Meijin no Jissen Mahjong 2
  Idol Shisen Mahjong, Tiles of Fate
  Ikari, Ikari Warriors
  Ikari II - Dogosoken, Ikari Warriors II - Victory Road
  Ikari III - The Rescue, Ikari III
  Ike Ike! Nekketsu Hockey Bu - Subette Koronde Dai Rantou
  Ikinari Musician
  Image Fight
  Immortal, The
  Incredible Crash Dummies, The
  Indiana Jones and the Last Crusade (Taito)
  Indiana Jones and the Last Crusade (UBI Soft)
  Infiltrator
  Insector X
  International Cricket
  Ironsword - Wizards & Warriors II
  Isaki Shuugorou no Keiba Hisshou Gaku
  Isolated Warrior, Max Warrior - Wakusei Kaigenrei
  Itadaki Street - Watashi no Mise ni Yottette
  Ivan Ironman Stewart's Super Off-Road, Super Off-Road
  JJ - Tobidase Daisakusen Part 2, 3-D Battles of World Runner, The
  Jackal
  Jackie Chan, Jackie Chan's Action Kung Fu
  Jajamaru Gekimaden - Maboroshi no Kinmajou
  Jajamaru Ninpou Chou, Taro's Quest (Prototype)
  James Bond Jr
  Jangou
  Jarinko Chie - Bakudan Musume no Shiawase Sagashi
  Jaws
  Jesus - Kyoufu no Bio Monster
  Jetsons, The - Cogswell's Caper!
  Jia A Fung Yun (Waixing)
  Jigoku Gokuraku Maru, Kabuki - Quantum Fighter
  Jikuu Yuuden - Debias
  Jin Yong Qun Xia Zhuan - Shu Jian Jiang Shan (Nanjing, NJ031)
  Jimmy Connor's Tennis
  Jing Ke Xin Zhuan
  Jongbou
  Journey to Silius, Raf World
  Journey to the West (Micro Genius)
  Joust
  Jovial Race
  Joy Mech Fight
  JuJu Densetsu, Toki
  Jumbo Ozaki no Hole in One Professional
  Jumpin' Kid - Jack to Mame no Ki Monogatari
  Jungle Book, The
  Jurassic Park
  Just Breed
  Juuouki
  Juuryoku Soukou Metal Storm, Metal Storm
  Juvei Quest
  Kaettekita! Gunjin Shougi - Nanya Sore!
  Kage no Densetsu, Legend of Kage, The
  Kagerou Densetsu
  Kaiketsu Yanchamaru, Kid Niki - Radical Ninja
  Kaiketsu Yanchamaru 2 - Karakuri Land
  Kaiketsu Yanchamaru 3 - Taiketsu! Zouringen
  Kame no Ongaeshi - Urashima Densetsu, Xexyz
  Kamen Rider Club
  Kamen Rider SD - Guranshokkaa no Yabou
  Kamen no Ninja - Akakage
  Karaoke Studio, Karaoke Studio Senyou Cassette Vol 1, Karaoke Studio Senyou Cassette Vol 2
  Karate Champ
  Karnov
  Kero Kero Keroppi no Daibouken
  Kero Kero Keroppi no Daibouken 2 - Donuts Ike ha Oosawagi!
  Keroppi to Keroriinu no Splash Bomb!
  Kick Master
  Kickle Cubicle, Meikyuu Shima
  Kid Icarus
  Kid Klown, Mickey Mouse 3 - Yume Fuusen, Mickey Mouse - Dream Balloon (Prototype)
  King Kong 2 - Ikari no Megaton Punch
  King Neptune's Adventure
  King of Fighters 96
  King of Kings
  King of Kings, The (Wisdom Tree)
  Kinnikuman - Muscle Tag Match, M.U.S.C.L.E.
  Kiwi Kraze, New Zealand Story
  Klash Ball
  Knight Rider
  Konami Hyper Soccer
  Koushien
  Krazy Kreatures
  Krion Conquest, The, Magical Doropie
  Krusty's Fun House
  Kujaku Ou 2
  Kung-Fu Heroes, Super Chinese
  Kunio-kun no Nekketsu Soccer League
  Kurogane Hiroshi no Yosou Daisuki! - Kachiuma Densetsu
  Kyatto Ninden Teyandee
  Kyonshiizu 2
  Kyuukyoku Harikiri Koushien
  Kyuukyoku Harikiri Stadium
  Kyuukyoku Harikiri Stadium - Heisei Gannen Han
  Kyuukyoku Harikiri Stadium 3
  Kyuukyoku Tiger, Twin Cobra
  Labyrinth
  Lagrange Point
  Last Action Hero
  Last Armageddon
  Last Ninja, The
  Layla
  Legend of Prince Valiant, The
  Legend of the Ghost Lion, White Lion Densetsu
  Legend of Zelda, The, Zelda no Densetsu 1 - The Hyrule Fantasy
  Legendary Wings
  Legends of the Diamond
  Lei Dian Huang Bi Ka Qiu Chuan Shuo (Nanjing, NJ046)
  Les Chevaliers Du Zodiaque - La Legende D'or, Saint Seiya - Ougon Densetsu
  Lethal Weapon
  Lethal Weapon (Taiwan)
  Liang Shan Ying Xiong (Nanjing, NJ023)
  Lifeforce, Salamander
  Linus Spacehead's Cosmic Crusade, Cosmic Spacehead
  Lion King, The
  Lion King III, The - Simon and Pumba (Dragon Co., TomSoft)
  Little Magic
  Little Mermaid - Ningyo Hime, Little Mermaid, The
  Little Nemo - The Dream Master, Nemo - Pajama Hero
  Little Ninja Brothers, Super Chinese 2 - Dragon Kid
  Little Samson, Seirei Densetsu Lickle
  Locksmith
  Lode Runner
  Lone Ranger, The
  Loopz
  Lost Word of Jenny
  Low G Man
  Lunar Ball, Lunar Pool
  Lupin Sansei - Pandora no Isan
  Mad Max
  Magic Bubble, Mermaids of Atlantis, Bubble Bath Babes, Soap Panic
  Magic Candle, The
  Magic Darts
  Magic Jewelry
  Magic Jewelry 2
  Magic John, Totally Rad
  Magic Johnson's Fast Break
  Magic Mathematics (Sachen)
  Magical Taruruuto-kun - Fantastic World!!
  Magician
  Magnum Kiki Ippatsu - Empire City - 1931
  Mahjan Samit Kabukicho Hen (Sachen), Mahjong World (Sachen)
  Mahjang Companion (Sachen)
  Mahjong Academy (Sachen)
  Mahjong Club - Nagatachou
  Mahjong RPG Dora Dora Dora
  Mahjong Taikai
  Mahjong Taisen
  Mahou no Princess Minky Momo - Remember Dream
  Majaventure - Mahjong Senki
  Major League Baseball
  Majou Densetsu II - Daimashikyou Galious
  Maniac Mansion (Japan)
  Mappy
  Mappy Kids
  Mappy-Land
  Marble Madness
  Mario & Yoshi, Yoshi, Yoshi no Tamago
  Mario is Missing!
  Mario Open Golf, NES Open Tournament Golf
  Mario's Time Machine!
  Marvel's X-Men, Uncanny X-Men, The
  Mashin Eiyuu Den Wataru Gaiden
  Masuzoe Youichi - Icchou Made Famicom
  Matsumoto Tooru no Kabushiki Hisshou Gaku
  Matsumoto Tooru no Kabushiki Hisshou Gaku 2
  Mechanized Attack
  Mega Man, Rockman
  Mega Man 2, Rockman 2 - Dr. Wily no Nazo
  Mega Man 3, Rockman 3 - Dr. Wily no Saigo!
  Mega Man 4, Rockman 4 - Aratanaru Yabou!!
  Mega Man 5, Rockman 5 - Blues no Wana!
  Mega Man 6, Rockman 6 - Shijou Saidai no Tatakai!!
  Meiji Ishin
  Meimon! Dai San Yakyuu Bu
  Meimon! Takonishi Ouendan - Kouha 6 Nin Shuu
  Meitantei Holmes - Kiri no London Satsujin Jiken
  Meitantei Holmes - M Kara no Chousenjou
  Melville's Flame
  Menace Beach
  Mendel Palace, Quinty
  Metal Fighter, Mei Loi Siu Ji (Sachen / Kinema Music / Color Dreams), Wei Lai Xiao Zi (Joy Van)
  Metal Flame Psybuster, Metal Mech - Man & Machine
  Metal Max
  Metal Slader Glory
  Metroid
  Mezase Pachi Pro - Pachio-kun
  Mezase Top Pro - Green ni Kakeru Yume
  MiG 29 - Soviet Fighter
  Michael Andretti's World Grand Prix, Nakajima Satoru - F-1 Hero
  Mickey Mania, China Rabbit Baby
  Mickey Mouse, Mickey Mousecapade
  Micro Machines
  Might and Magic
  Mike Tyson's Punch-Out!!, Punch-Out!!
  Millionaire (Sachen)
  Mindseeker
  Minelvaton Saga
  Miracle Ropit's Adventure in 2100
  Mirai Senshi - Lios
  Mirai Shinwa Jarvas
  Mission Impossible
  Mito Koumon - Sekai Manyuu Ki
  Mitsume ga Tooru
  Mo Jie Ba Zhu (Nanjing, NJ079), Mo Jie Ta Shi (Nanjing)
  Moai-kun
  Mobile Suit Z Gundam - Hot Scramble
  Moero TwinBee - Cinnamon Hakase wo Sukue!, Stinger
  Momotarou Densetsu
  Momotarou Densetsu Gaiden
  Momotarou Dentetsu
  Money Game, The
  Money Game 2 - Kabutochou no Kiseki, The
  Monster In My Pocket
  Monster Party
  Monster Truck Rally
  Moon Crystal
  Moon Ranger
  Morita Kazuo no Shougi
  Mortal Kombat II/III Special (JY)
  Mortal Kombat V (YOKO)
  Motocross Champion
  Mottomo Abunai Deka
  Mouryou Senki Madara
  Ms. Pac-Man (Namco)
  Ms. Pac-Man (Tengen)
  Muppet Adventure - Chaos at the Carnival
  Musashi no Bouken
  Musashi no Ken - Tadaima Shugyou Chuu
  Mutant Virus, The
  My Life My Love - Boku no Yume - Watashi no Negai
  NARC
  NES Play Action Football
  Nagagutsu wo Haita Neko - Sekai Isshuu 80 Nichi Daibouken, Puss 'n Boots - Pero's Great Adventure
  Nakajima Satoru - F-1 Hero 2
  Nakayoshi to Issho
  Namco Classic II
  Namcot Mahjong 3 - Mahjong Tengoku
  Nangoku Shirei!! - Spy Vs Spy
  Nantettatte!! Baseball
  Napoleon Senki
  Napoleon's War (Waixing)
  Navy Blue
  Ne Zha Chuan Qi (Nanjing, NJ036)
  Nekketsu Kakutou Densetsu
  Nekketsu Kouha - Kunio-kun, Renegade
  Nekketsu Koukou Dodgeball Bu - Soccer Hen, Nintendo World Cup
  Nekketsu! Street Basket - Ganbare Dunk Heroes
  New Ghostbusters II
  New York Nyankies, Rockin' Kats
  Nichibutsu Mahjong 3 - Mahjong G Men
  Nigel Mansell's World Championship Challenge
  Nightshade
  Nihonichi no Mei Kantoku
  Ninja Cop Saizou, Wrath of the Black Manta
  Ninja Crusaders - Ryuuga, Ninja Crusaders
  Ninja Gaiden, Ninja Ryukenden, Shadow Warriors
  Ninja Gaiden 2 - The Dark Sword of Chaos, Ninja Ryukenden II - Ankoku no Jashin Ken, Shadow Warriors Episode II - The Dark Sword of Chaos
  Ninja Gaiden 3 - The Ancient Ship of Doom, Ninja Ryukenden III - Yomi no Hakobune
  Ninja Jajamaru - Ginga Daisakusen, Squashed (Prototype)
  Ninja-kun - Ashura no Shou
  Ninjara Hoi!
  Nintendo World Championships 1990
  Noah's Ark
  Nobunaga no Yabou - Sengoku Gunyuu Den, Nobunaga's Ambition 2
  North & South
  Nuts & Milk
  Ochin ni Toshi Puzzle Tonjan!
  Oishinbo
  Olympic IQ (Sachen)
  Operation Secret Storm
  Operation Wolf
  Orb 3D
  Osomatsu-kun
  Over Horizon
  Overlord
  P'radikus Conflict, The
  Paaman - Enban wo Torikaese!!
  Paaman Part 2 - Himitsu Kessha Madoodan wo Taose!
  Pac-Land
  Pac-Man
  Pac-Mania
  Pachi Com
  Pachi-Slot Adventure 2 - Sorotta-kun no Pachi Slot Tanteidan
  Pachio-kun 2
  Pachio-kun 3
  Pachio-kun 4
  Pachio-kun 5
  Palamedes
  Palamedes 2 - Star Twinkles
  Panda Prince
  Panda World
  Panic Restaurant, Wanpaku Kokkun no Gourmet World
  Paperboy
  Parallel World
  Parasol Henbee
  Parasol Stars - The Story of Bubble Bobble 3
  Paris-Dakar Rally Special
  Perfect Bowling
  Perfect Fit
  Pescatore (Prototype)
  Pesterminator - The Western Exterminator
  Phantom Fighter, Reigen Doushi
  Pictionary
  Pinball
  Pin Bot
  Pipe Dream
  Pirates!
  Plasma Ball
  Platoon
  Pocahontas
  Pocahontas 2 (Super Game)
  Pocket Monster (Early Super Game)
  Pocket Monster Red (Waixing)
  Poke Block, Mahjong Block
  Poker Mahjong
  Pokemon Gold (Mars)
  Pole Chudes (Chudov)
  Power Blade, Power Blazer
  Power Punch 2
  Power Rangers III
  Power Rangers IV
  Predator
  President no Sentaku
  Prince of Persia
  Pro Action Replay
  Pro Sport Hockey, USA Ice Hockey in FC
  Pro Yakyuu - Family Stadium '87
  Pro Yakyuu - Family Stadium '88
  Probotector II - Return of the Evil Forces, Super C, Super Contra
  Punisher, The
  Puyo Puyo
  Puzslot
  Puzznic
  Pyokotan no Dai Meiro
  Pyramid (Sachen)
  Pyramid II (Sachen)
  Q Boy (Sachen)
  Q-bert
  Qi Guo Da Zhan (Nanjing, NJ029)
  Quarter Back Scramble
  Quattro Adventure (Codemasters)
  Quattro Arcade (Codemasters)
  Quattro Sports, Super Sports Challenge (Codemasters)
  Quest of Ki, The
  R.B.I. Baseball, Pro Yakyuu - Family Stadium, Atari RBI Baseball (VS)
  R.B.I. Baseball 2
  R.B.I. Baseball 3
  R.C. Pro-Am 2
  Racer Mini Yonku - Japan Cup
  Rad Racer 2
  Radia Senki - Reimei Hen
  Raid 2020 (Color Dreams)
  Raid on Bungeling Bay
  Rainbow Islands - The Story of Bubble Bobble 2 (US, Japan)
  Rainbow Islands - The Story of Bubble Bobble 2 (Europe)
  Rampage
  Rampart (Konami)
  Rampart (Jaleco)
  Rasaaru Ishii no Childs Quest
  Remote Control
  Ren & Stimpy Show, The
  Road Fighter
  RoadBlasters
  Robin Hood - Prince of Thieves
  Robocop
  Robocop 2
  Robodemons (Clor Dreams)
  Rocket Ranger
  Rocketeer, The
  Rocman X (Sachen)
  Rod Land
  Roger Clemens MVP Baseball
  Rokudenashi Blues
  Rollerblade Racer
  Rolling Thunder
  Romancia
  Route-16 Turbo
  Rush'n Attack
  Scarabeus (Prototype)
  SD Battle Oozumou - Heisei Hero Basho
  SD Gundam - Gachapon Senshi 3 - Eiyuu Senki
  SD Gundam - Gachapon Senshi 4 - NewType Story
  SD Gundam Gaiden - Knight Gundam Monogatari
  SD Gundam Gaiden - Knight Gundam Monogatari 2 - Hikari no Kishi
  SD Gundam Gaiden - Knight Gundam Monogatari 3 - Densetsu no Kishi Dan
  SD Hero Soukessen - Taose! Aku no Gundan
  SD Keiji - Blader
  Saint Saiya - Tian Ma Huan Xiang (Nanjing)
  Saint Seiya - Ougon Densetsu Kanketsu Hen
  Saiyuuki World
  Saiyuuki World 2 - Tenjoukai no Majin, Whomp'Em
  Sakigake!! Otoko Juku - Shippuu Ichi Gou Sei
  San Guo Zhi - CaoCao Zhuan (Nanjing, NJ018)
  San Guo Zhi - Qun Xiong Zheng Ba (Asder)
  Sangokushi - Chuugen no Hasha
  Sangokushi II - Haou no Tairiku
  Sanma no Mei Tantei
  Sanrio Carnival
  Sanrio Cup - Pon Pon Volley
  Sansara Naga
  Satomi Hakkenden
  Satsujin Club
  Secret Scout (Color Dreams)
  Secret Ties (Prototype)
  Section Z
  Seicross
  Seikima II - Akuma no Gyakushuu
  Seirei Gari
  Shanghai
  Shanghai 2
  Shatterhand, Tokkyuu Shirei - Solbrain
  Sheng Huo Lie Zhuan (C & E)
  Sherlock Holmes - Hakushaku Reijou Yuukai Jiken
  Shin 4 Nin Uchi Mahjong - Yakuman Tengoku
  Shin Moero!! Pro Yakyuu
  Shin Samurai Spirits 2 - Haoumaru Jigoku Hen
  Shingen The Ruler, Takeda Shingen 2
  Shinobi (Tengen)
  Shougi Meikan '92
  Shougi Meikan '93
  Shougun
  Shoukoushi Ceddie
  Shufflepuck Cafe
  Shui Hu Shen Shou (Nanjing, NJ019)
  Side Pocket
  Silva Saga
  Silver Eagle (Sachen)
  Silver Surfer
  Simpsons, The - Bart Vs. the Space Mutants
  Simpsons, The - Bart Vs. the World
  Simpsons, The - Bartman Meets Radioactive Man
  Skate or Die 2 - The Search for Double Trouble
  Ski or Die
  Sky Destroyer
  Sky Kid, Super Sky Kid
  Sky Shark, 1945 (Pirate)
  Slalom, VS Slalom
  Smash T.V.
  Smurfs, The
  Snow Bros.
  Soccer
  Solomon no Kagi, Solomon's Key
  Solstice
  Somari, Sonic The Hedgehog, Super Sonic 5, Sonic 3D Blast 6 (NT)
  Son Son
  Space Harrier
  Space Hunter
  Space Shuttle Project
  Spartan X 2
  Spelunker
  Spelunker 2 - Yuusha heno Chousen
  Spiritual Warfare
  Splatter House - Wanpaku Graffiti
  Spot
  Spy Hunter
  Sqoon
  Square no Tom Sawyer
  Stack-Up, Robot Block
  Stanley - The Search for Dr. Livingston
  Star Force
  Star Luster
  Star Soldier, Star Soldier Special Version
  Star Trek - The Next Generation
  Star Trek V - The Final Frontier (Prototype)
  Star Wars (Namco)
  Star Wars - The Empire Strikes Back
  Startropics
  Startropics 2 - Zoda's Revenge
  Sted - Iseki Wakusei no Yabou
  Street/Master Fighter II/III - The World Warriors (YOKO)
  Street Fighter III
  Strider
  Strike Wolf (TXC)
  StudyBox
  Stunt Kids
  Sugoro Quest - Dice no Senshitachi
  Sukeban Deka 3
  Summer Carnival '92 - Recca
  Sunman (Prototype)
  Super Chinese 3
  Super Contra 3, Contra Spirits
  Super Contra 7
  Super Contra X (TXC)
  Super Donkey Kong 2 (NT)
  Super Donkey Kong (NT, Ei-How Yang)
  Super Dyna'mix Badminton
  Super Glove Ball
  Super Mario Bros., All Night Nippon Super Mario Bros., VS Super Mario Bros.
  Super Mario Bros. 2, Super Mario USA
  Super Mario Bros. 3
  Super Mario World
  Super Momotarou Dentetsu
  Super Pang
  Super Pang 2
  Super Pinball
  Super Pitfall
  Super Rugby
  Super Shinobi
  Super Spike V'Ball, US Championship V'Ball
  Super Sprint
  Super Turrican
  Super Xevious - Gump no Nazo
  Superman
  Swamp Thing
  Sweet Home
  Sword Master
  Swords and Serpents
  T & C 2 - Thrilla's Surfari
  Tag Team Pro-Wrestling, Tag Team Wrestling, Special Tag Team Pro-Wrestling
  Tai Kong Huan Xiang (Nanjing, NJ016)
  Taito Basketball, Ultimate Basketball
  Taito Chase H.Q.
  Taito Grand Prix - Eikou heno License
  Taiyou no Shinden - Asteka 2, Tombs and Treasure
  Taiyou no Yuusha Firebird
  Taiwan Mahjoing II
  Takahashi Meijin no Bouken Shima IV
  Takahashi Meijin no Bugutte Honey
  Takeda Shingen
  Takeshi no Chousenjou
  Takeshi no Sengoku Fuuunji
  Tantei Jinguuji Saburou - Toki no Sugiyuku Mama ni
  Target Renegade
  Tasac
  Tashiro Masashi no Princess ga Ippai
  Tatakae!! Rahmen Man - Sakuretsu Choujin 102 Gei
  Tatakai no Banka, Trojan
  Tecmo Bowl
  Tecmo Super Bowl
  Tecmo World Cup Soccer
  Teenage Mutant Ninja Turtles II - The Arcade Game, Teenage Mutant Hero Turtles II - The Arcade Game, Teenage Mutant Ninja Turtles (Japan)
  Teenage Mutant Ninja Turtles III - The Manhattan Project, Teenage Mutant Ninja Turtles 2 - The Manhattan Project (Japan)
  Teenage Mutant Ninja Turtles - Tournament Fighters
  Tekken 2
  Tenchi wo Kurau II - Shokatsu Koumei Den
  Tenka no Goikenban - Mito Koumon
  Tenkaichi Bushi - Keru Naguuru
  Terminator 2 - Judgment Day
  Terminator, The
  Terra Cresta
  Tetrastar - The Fighter
  Tetris (Nintendo)
  Tetris (Tengen)
  Tetris 2, Tetris Flash
  Tetris 2 + Bombliss
  Tetsudou Ou - Famicom Boardgame
  Tetsuwan Atom
  Thexder
  Thomas the Tank Engine and Friends (Prototype)
  Thunder Warrior (Micro Genius)
  Thunderbirds
  Thunderbolt 2 - Fighting Plane (Game Tech, Open Corp.)
  Thundercade
  Tiger-Heli
  Time Diver Eon Man (Prototype), Time Diver Avenger (Nitra)
  Time Zone
  Tiny Toon Adventures
  Tiny Toon Adventures 2 - Montana Land e Youkoso, Tiny Toon Adventures 2 - Trouble in Wackyland
  Tiny Toon Adventures 6
  Tiny Toon Adventures Cartoon Workshop
  Titan
  Titan Warriors (Prototype)
  TM Network - Live in Power Bowl
  Toki no Tabibito
  Tokoro San no Mamoru mo Semeru mo
  Tom & Jerry and Tuffy
  Toobin'
  Top Gun - Dual Fighters, Top Gun - The Second Mission
  Top Rider
  Touch Down Fever
  Touhou Kenbun Roku
  Toukon Club
  Tokyo Pachi Slot Adventure
  Toy Story
  Tower of Druaga, The
  Toxic Crusaders
  Treasure Master
  Trolls on Treasure Island
  Tsuppari Wars
  Tsuri Kichi Sanpei - Blue Marlin Hen
  Tsuru Pika Hagemaru - Mezase! Tsuru Seko no Akashi
  TwinBee
  TwinBee 3 - Poko Poko Dai Maou
  Uchuu Keibitai SDF
  Ugadayka (Chudov)
  Ultimate Mortal Kombat 3 (NT)
  Ultimate Mortal Kombat 4 (NT), Mortal Kombat 4 (NT)
  Ultimate Stuntman
  Ultraman Club - Kaijuu Dai Kessen!!
  Ultraman Club 2 - Kaettekita Ultraman Club
  Universe Soldiers, The (GamTec)
  Untouchables, The
  Utsurun Desu
  Valis - The Fantastic Soldier
  Valkyrie no Bouken - Toki no Kagi Densetsu
  Vegas Connection - Casino Kara Ai wo Komete
  Vegas Dream, Viva! Las Vegas
  Venus Senki
  Videomation
  Volguard II
  Wagyan Land
  Wagyan Land 2
  Wagyan Land 3
  Wai Wai World
  Wai Wai World 2 - SOS!! Paseri Jou
  Wait and See! (Dragon Co., TomSoft)
  Wall Street Kid
  Wang Zi Fu Chou Ji (Henggedianzi)
  Wario no Mori, Wario's Woods
  Warpman
  Wayne Gretzky Hockey
  Wayne's World
  Where in Time is Carmen Sandiego
  Where's Waldo
  Who Framed Roger Rabbit
  Widget
  Willow
  Win, Lose or Draw
  Wing of Madoola, The
  Wit's
  Wizardry II - Legacy of Llylgamyn
  Wizardry III - Diamond no Kishi, Wizardry - The Knight of Diamonds
  Woody Poko
  World Boxing
  World Games
  World Hero, Chinese Hero
  Wrecking Crew
  Wu Shi Hun, Samurai Spirits, Samurai Showdown III
  Xevious
  Xi Tian Qu Jing II (Journey to the West II)(Waixing)
  Xian Jian Qi Xia Zhuan (Nanjing)
  Xiao Au Jiang Wu (Nanjing)
  Xiao Ma Li, Bingo
  Yie Ar Kung-Fu
  Yo! Noid, Kamen no Ninja - Hanamaru
  Yoshi no Cookie, Yoshi's Cookie
  Youkai Douchuuki
  Youkai Club
  Ys
  Ys II - Ancient Ys Vanished - The Final Chapter
  Yuefei (Mars, Union Bond G-006)
  Yu-Gi-Oh (Nanjing, NJ032)
  Yume Penguin Monogatari
  Zanac
  Zelda II - The Adventure of Link
  Zen Intergalactic Ninja
  Zhen Ben Xi You Ji (Asder)
  Zhen Shi Hun - Wu Shi Dao Lie Zhuan (Nanjing, NJ033)
  Zhong Guo Xiang Qi, Qi Wang - Chinese Chess
  Zoids - Chuuou Tairiku no Tatakai
  Zoids 2 - Zenebasu no Gyakushuu
  Zoids Mokushiroku
  Zombie Hunter
  Zunou Senkan Galg

Cheats summary:
generic cheats-377
unique cheats-1122
buried secrets-573
fixed generic cheats-218
unverified games-5
games with secrets-1139
games with no secrets found-609

83-in-1 [p1][!], 100-in-1 (MG109) [p1][!]

(UNI) Test program (added 06.11.12):
Early "Unchained Melody" multigame carts surprisingly in addition to generic menu have an internal self test program, performing tests of CHR, PRG data, mirroring and banking support. Can be activated by pressing Select + Start at the game menu.
Source: tcrf.net

150-in-1 [p1][!], 200-in-1 - Elfland (Unl)[U][!]

(UNI) Test program (added 18.02.10):
Some pirate multigame carts surprisingly in addition to generic menu have an internal self test program, performing tests of CHR, PRG data, mirroring and banking support. Can be activated by pressing Select + Start at the game menu.

Super HIK 300-in-1 1994 [p1][!], 9999-in-1 [p1][!], 9999999-in-1 [p1], 10000000-in-1 [p1][!]

(UNI) Secret message (added 06.11.12):
A later "Unchained Melody" carts haven't internal self test routines, but they had hidden message with the revision number. Just at the menu screen hold Left + Start and press B. There are three different revisions in total: "1.0", "1.1" and "1.2". Multigame cart with 1997 games in one hasn't this menu at all.

Coolboy 198-in-1, Coolboy 400-in-1

Newer revisions type 1:

(UNI) Self test (added 09.07.15):
Hold A + B and press Reset to enter the ROM/RAM self test. Thire is no this test in older revisions, but in newer ones (type 2) it has replaced with other cheats too, while the test code still sitting in their ROMs.

Newer revisions type 2:

(UNI) Hidden games (added 09.07.15):
Hold one of the following combinations and press Reset to start instantly a specific game hidden inside the ROM:
A + Select-Undersea Arena
B + Select-Astyanax
Select + Start-Dr.Mario

'89 Dennou Kyuusei Uranai

(GEN) Secret message:
At the title screen, press A + B to view hidden credits.
Source: ReyVGM

100 Man $ Kid - Maboroshi no Teiou Hen, Casino Kid

US version:

(GEN) Continue:
At the game over screen, hold Up then press Start.
Source: ReyVGM

(UNI) Secret passwords:
Instead "_" symbol you should use "FORWARD" option on the password entering screen. Secret passwords need to be enabled before the game. When you entering level and splash screen gives an advice to you, hold Start before pressing A to skip splash screen.
i_am_a_richman-Gives you $100000.
i_wanna_see_the_king-Final poker battle with the King (Elvis is alive! ;)). If you win you'll see ending sequence. Also enables the Debug mode, see below.
i_wanna_go_bankrupt-Takes you to the game over screen (strange cheat).
debug_monitor_switch_on-Debugging functions.
In addition to A + Start on controller 1, hold Left + A on controller 2 before skipping the splash screen.
To switch to in game debugging monitor hold Left + A on controller 2 then press Start on controller 1,
"MONITOR VERSION 1.00 PRESENT BY HIRO" screen appears. You will be able to view game events, play music and sounds.

Japanese version:

(UNI) Secret warps (added 03.02.14):
At the casino in any level during the game, a special warp places exists. If you stand on it, then hold Left + A on controller 2, and finally press A on controller 1, you'll be warped to another level.
Lasvegas, warp to Japan-In the bottom-right corner of the casino, there is a two tables, stand from the left of the leftmost table and face to the south.
Japan, warp to New York-Go to the bottom-right corner of the casino, there is a two water pools, from the right of the upper one there is a small single weddin machine. Stand just before it and face to the East.
New York, warp to Monaco-Go to the leftmost corner of the ship, stand before the leftmost light spot, face to the West.
Monaco, warp to Lasvegas-Go to the top-right corner of the casino, find a roulette table, there is a small path from the left of it, walk it up to the wall and face North.

(UNI) Secret message (added 03.03.14):
During the game, hold Left + A on controller 2, then press Select.

(UNI) Secret words (added 11.10.08):
Enter one of following words as player name, select "おわり" option hold Start and hold A on controller 1.
おかねもち-Gives you $100000.
うと゛いかに-Final poker battle. If you win you'll see ending sequence. Also enables the Debug mode, see below.
しんて゛い-Takes you to the game over screen (strange cheat).
もにたおん-Debug mode.
In addition to A + Start on controller 1, hold Left + A on controller 2 before skipping the splash screen.
To switch to the debugging monitor hold Left + A on controller 2 then press Start on controller 1,
"MONITOR VERSION 1.00 PRESENT BY HIRO" screen appears. You will be able to view game events, play music and sounds.

Taiwan Mahjong 16, Tai Wan Ma Que 16

(UNI) Secret message 1 (added 02.12.08):
At the title screen, press Up, A, Left, B, Down, B, Right, A, B, B, A on controller 1.

(UNI) Secret message 2 (added 09.02.15):
During the game, during player's turn, press Up, Down, B, B, Left, Right, A, A, Up, Down, Left, Right, A, B on controller 2.

(UNI) Secret message 3 (added 09.02.15):
During the game, during player's turn, press Right, A, B, A, Down, B, A, B, Up, A, A, B, Left, B, B, A on controller 2.

(UNI) Secret message 4 (added 09.02.15):
During the game, hold Up + Select on controller 1 before the player's turn. Repeat this for at least 10 turns. Last three messages are the same andthey are full version of the title screen message. All four message strings are simple encoded with XOR function, each string uses different XOR encoding value, so you couldn't see them in RAW hex or ASCII dump.

1943

(UNI) Auto-fire (added 03.02.14):
This cheat can be enabled with the Famicom 4-Player Adaptor (4-Score Adaptor for the NES system can't be used, it's incompatible). Hold B on controller 4, then press Reset. Now if you hold B on controller 1, your ship will fire always. So this cheat isn't much useful on any controller with auto-fire buttons, but very useful on Famicom system with the original controllers.

(UNI) Password generator (added 11.04.08):
Game Level:
Offensive Power:
Defensive Power:
Energy Level:
Special Weapon:
SW Time Limit:
Pts available:
Alt Password:
Password:


1999 - Hore Mitakotoka! Seikimatsu

(UNI) Sound test (added 23.12.12):
Start a new game, generate your character, and while three other characters are generating, hold A + B + Select + Start. When screen with current year is displayed, a string "さうんと えふく きょく" will appear at the screen bottom. Use D-Pad buttons to select music or sound, play it with A or B accordingly.

3D Block

(UNI) Level select (added 16.05.12):
At the title screen, press A, B, Up, Down on controller 1 then press A to increase level number. By default you can select only first 10 levels. With this cheat, you can select any level up to 20.

(UNI) Game ending (added 16.05.12):
At the title screen, press A, B, Up, Down on controller 1 then press Select 10 times. The girl's silhouette will change the color and show actual nude picture. This is what appears if you beat the game.

4 Nin Uchi Mahjong

(BUR) Hidden text (added 31.10.08):
There is hidden copyright message at the start of each known ROM versions:
JANKYO (C)HUDSON SOFT IN Sep/7/1984 By M.TOBITA
for PRG0 and
JANKYO (C)HUDSON SOFT IN Nov/13/1984 By M.TOBITA
for PRG1.

6-in-1 (Caltron, HES)

(BUR) Hidden text (added 03.02.14):
Menu for this multigame cartridge contains a hidden copyright string:
Main_Program & Hardware design by Shao_Hwa Chiou


720

(UNI) Class select (added 23.12.12):
At the title screen, set cursor to the "CONTINUE" option and press Left + A + Select + Start on controller 2. A small number will appear left to the menu, displaying the current class level. Each time you press the button code, number is increasing from 1 to 4. Now continue the game to play with selected class.

8 Eyes

Japanese version:

(GEN) Sound test:
Pause the game, and you can use controller 2 to scroll through the tracks with Left or Right and play a track with A. This cheat actually should've been enabled by the button code during pause A + B on controller 1 and A + B on controller 2 at the same time, but by accident, the cheat enable flag was overwritten with some system variable and in this particular place always non zero, so this cheat is always enabled automatically, when you enter the pause mode. In the US version this cheat was removed completely.
Source: ReyVGM

(UNI) Password generator (added 08.08.08):
Random:
Cleared:Arabia
Italia
India
Egypt
Germany
Spain
Africa
Hints:Between Black and White are five jewels
Between Black and White, there is no Yellow
Near Red there is no Orange, Yellow is on the far Left
Near White and Yellow there is no Purple
White is next to Yellow, Black is next to Red
Between Green and Purple are two jewels
Blue is next to Purple, Black is on the far Right
Level:
Password:


US version:

(GEN) Secret passwords:
TAXANTAXAN-Special stage
FINALSTAGE-Final stage

(UNI) Password generator (added 07.08.08):
Random:
Quest:
Cleared:Arabia
Italia
India
Egypt
Germany
Spain
Africa
Hints:Black is on the far right
White is next to Yellow
Black is next to Red
White, Orange, and purple are all separated
Between Black and White, there is no Yellow
Between Green and Purple are two jewels
Purple is next to Red
Level:
Password:


AV Jiu Ji Ma Jiang 2

(UNI) Slideshow (added 15.09.08):
At the title screen, after "START" message appears press Up, Up, Left, Left, Down, Down, Right, Right.

(UNI) Extra 900 game points (added 15.09.08):
At the title screen, after "START" message appears press Up, Up, Left, Left, Down, Down, Right then press Up + Right. A sound will confirm correct code entry.

AV Mahjongg

(UNI) Slideshow:
Press Left, Left, Right, Right, B, A at the title screen.

(UNI) Easy play:
Press Up, Up, Down, Down, B, A, Start at the title screen. When you will be starting any Mahjong game, you'll be able to choose any option before game.

AV Hanafuda Club

(UNI) Easy play and instant win:
During the game, press Start, Select, Start, Select, B, Start, B, Select, B, B. Press B to choose the card to toss. Press Start to instant win.

AV Pachi-Slot, Hot Slot

(UNI) Disable payout (added 13.02.14):
During the game, when you win something, the machine will payout the prize immediately. You can keep your prize inside the machine as a credit. To do that, before inserting the coins, press Start and immediately press B once (don't hold it) on controller 1, this will not only show you the money you won, but disable the payout for the next winning. You need to do this trick every time after win to keep all your prize as a credit.

(UNI) Slideshow (added 13.02.14):
During the game, before instering coins, press Left, Left, Right, Left, a nude pictures will appear, press Start or A to advance to the next picture.

AV Poker (Hacker), Peek-A-Boo Poker (Panesian)

(GEN) Slideshow:
At the title screen, press Select, Start, A, Up, B, Down. The first slideshow picture will appear after a brief pause. Press A, A, Up, B, Down to see the next one.

AV Pretty Girl Fighting, AV Mei Shao Nv Zhan Shi

(UNI) Slideshow:
Press Up, Up, Left, Right, Down, Down, Up, Down at the title screen. You will see all nude pictures.

AV Soccer, Ultimate League Soccer, Fuetball

(UNI) Slideshow or ending sequence:
At the title screen, press Start once, then during ball animation, but before the team setup appears, quickly press Select, B, Up, A, Down, B, Left, A, Right. For the AV version this will enable the slide show with all nude pictures. For the regular version, this will show the ending sequence.

Aa Yakyuu Jinsei Icchokusen

(UNI) Secret words (added 10.01.08):
Enter as player name:
さうんと-Sound test

Abadox

(UNI) Maximum powerups:
At the license screen (for the US version) or at the title screen (for the Japanese version), press Up, Down, Right, Right, Up, Left, Right, Down, Left, Up, Start. During the game, press Start, Start to get a maximum powerups.

(FIX) Stage select and invulnerability:
At the license screen (for the US version) or at the title screen (for the Japanese version), press Left, Up, Right, Down, Up, Right, Left, Down (stage select only) or A, A, Up, B, B, Down, A, B (stage select, invulnerability, and maximum powerups), then one of the following button codes, to start at the corresponding stage:
Start-Stage 1
Up, Start-Stage 2
Up, A, Start-Stage 2 (midway point)
Left, Start-Stage 3
Left, A, Start-Stage 3 (midway point)
Down, Start-Stage 4
Down, A, Start-Stage 4 (midway point)
Right, Start-Stage 5
Right, A, Start-Stage 5 (midway point)
Select, Start-Stage 6
Select, A, Start-Stage 6 (midway point)
B, Start-Stage 7
B, A, Start-Ending sequence

Abarenbou Tengu, Zombie Nation

(GEN) Restore energy:
Pause the game and press Up, Up, Down, Down, Left, Right, Left, Right, B, A, Start. Note: This may only be done once per game.

(FIX) Sound test:
Hold Up + A + B at the copyright screen (for the US version) or before the reset or powering on the console (for the Japanese version) on controller 1 and wait for the next screen.

(UNI) CRC test:
Hold Up + Left + A + B on controller 2 and press Reset.

(UNI) Special round select (added 13.11.08):
Power on console then press Reset 25 times, at the title screen now press Up, Up, Down, Down, Left, Right, Left, Right, then press Start. You can select any stage or boss to start with, see the ending or enable stage scroll test from menu. Additionally, put cursor at the "EDIT MODE" option, hold A + B and press Start to enable CHR viewer instead of stage scroll test.

(UNI) Invulnerability (added 13.11.08):
Power on the console then press Reset 77 times, then use "Restore energy" cheat to obtain invulnerability instead.

(BUR) Hidden text (added 13.11.08):
The RESET routine in this game uses string
Prg.K_Hiramatsu
to check if game was soft or hard reset.

Aces - Iron Eagle 3, Ultimate Air Combat

(UNI) Secret passwords:
S3CR3T-Ultimate cheat screen.

(BUR) Drum mode:
There is some unused (no visible cross-refrences nether scripts nor direct calls) text similar to secret password message with pause code at the end. Probably was some secret password, but seems "drum mode" was enabled by default in final release.
00057820: 4C 4C 45 20 50 41 52 54 49 45 6A 44 52 55 4D 20 LLE PARTIEjDRUM.
00057830: 4D 4F 44 45 20 41 43 54 49 56 41 54 45 44 6A 46 MODE ACTIVATEDjF
00057840: 31 38 00 46 31 34 00 48 41 52 52 00 2D 2D 2D 00 18.F14.HARR.---.


Action in New York, Final Mission, SCAT - Special Cybernetic Attack Team

Japanese version:

(UNI) Level select and more:
At the title screen, hold A + B on controller 2 and then press on controller 1:
A + Start-Level 2
B + Start-Level 3
Right + Start-Level 4
Left + Start-Level 5
Up + Start-Ending sequence
Select + Start-Extra 10 lives

US version:

(GEN) Level select:
At the title screen, hold A + B on controller 2 and then press on controller 1:
A + Start-Level 2
B + Start-Level 3
Right + Start-Level 4

(UNI) Extra 12 lives:
At the title screen, hold Up + A + B on controller 2 and then press Start on controller 1.

European version:

(UNI) Level select and more:
At the title screen, press A, B, Right, Left, A, B, Up, Down, Select on controller 1 to enable cheats. Then press on controller 1:
A + Start-Level 2
B + Start-Level 3
Right + Start-Level 4
Left + Start-Level 5
Up + Start-Extra 12 lives

Addams Family, The

(UNI) Infinite lives:
Press A, B, B, A, Left, Right, Left, Right at the title screen, "c" letter appears in upper left screen corner.
Thanks Kitsune for corrections.

(BUR) Hidden text (added 05.12.08):
Most of the games programmed by Ocean shares the same music driver library all along with the hidden version and copyright string:
MUSIC DRIVER V1.0 (C)JONATHAN DUNN & OCEAN SOFTWARE


Addams Family, The - Pugsley's Scavenger Hunt

All versions:

(UNI) Password generator:
Lives:
Random:
Hearts:
Saved:Wednesday
Granny
Uncle Fester
Gomez
Password:


(BUR) Hidden text (added 13.11.08):
Most of the games programmed by Ocean shares the same music driver library all along with the hidden version and copyright string:
MUSIC DRIVER V1.0 (C)JONATHAN DUNN & OCEAN SOFTWARE


US version:

(BUR) GameGenie (added 05.12.08):
GAULAVGK-Re-enables a hidden copyright screens at the game start. This credits is enabled in the prototype version.

Advanced Dungeons & Dragons - Dragon Strike

(UNI) Sound test:
At the first title screen press Up, Down, Left, Right.

(UNI) Japanese version:
At the copyrights screen press Up, Right, Down, Left, Up, Up, Down, Down, Up, Down, Left, Right. Game will reset. From this point all messages will be in Japanese.

Advanced Dungeons & Dragons - Heroes of the Lance

(BUR) GameGenie (added 02.07.13):
AESNNYPA-Re-enable the simple debug mode. At the title screen menu hold Down on controller 2 then press A or B to change the map number. During the game press A on controller 2 to display current map number and other variable.

Adventures in the Magic Kingdom

(BUR) GameGenie (added 28.09.15):
There are three debug routines/helpers still sitting in the game's ROM. Two of them seems meant to be called anytime during the game with currently unexisting button codes to view or change current state of the game data and variables. Third one is for debugging the game message dialogs. All routines can't be re-enabled without some extra hacking, but can be accessed somehow with following GameGenie codes.
GAVYVOGK-Very hacky way to see the debug variables display at the top-left corner of the screen during the game and only if the RAM variable $AA is not zero. There are no proper number sprites left in most of the CHR sprite banks, so you couln'd see something useful anyway.
PTVSUTZE+OYVSKVKK+KYVNSPTE+UZVNVPEA-Use these codes to enter the sprite/palette/music test instead of the quiz mode during the game. This routine starts from the Sprite view mode.
Use Left or Right to change sprite displayed on the screen, It will be displayed animated, but there is no proper CHR bank setup for every sprite, and only the current one is used, so many of the sprites are can't be seen properly.
Press Select + Start to reset the game.
Press Up + Start to enter the Palette/Sound test mode. A set of vertical sprites will be displayed. Again, there are no number sprites, so all numbers are unreadable. You can do the following operations in this mode:
Press Up or Down to move the cursor to the desired palette index from 0 to 15.
Press Left or Right to change selected palette index by 1. Hold A or B in addition to change the hi bits of index.
Press B + Start to select the background palette to edit, press A + Start to select the sprites palette.
The first palette entry number also represents the music/sound track index, press Start to play it. Finally, press Down + Select to exit back to the Sprite view mode.
PTVSUTZE+OYVSKVKK+TGVNSPTE+KZVNVPEA-Replaces the quiz mode with the Message test mode. Press Left or Right to change the message number at the top of the screen (and surprisingly visible), press A to display the message. There are several messages unused in this game.%Indexes $00 and $01 are for the hidden programmers message "ADVENTURE IN MAGIC KINGDOM BY BAMBOO!!! TENTIWOKURAU WO YORUSIKU!!! SATURDAY'S MORNING IS MORNING SALAD". This message can't be seen during the game in other way.
Index $02 is for the dialog window test message with a lines of letters.
Index $03 is unused default "HELLO!" message for the quiz mode people with indexes above 7, but there are only 7 characters in this game that offers you a key for answer the questions. Probably on the early stage they were meant to be on the map all at once and you should find the right one every time, and all characters with no quiz may say the default message. In the final game, there is no one left on the map, when you got this quiz key and no one you can speak with.
Indexes $51-$55 are for unused dialog messages that offers you something instead of the Silver key. So either the one way or another, there should be a game behavior or a side quests that offers you something instead of silver keys. One more evidence for that is the unused graphics on the items screen, in addition to "KEY" string, there are "ITEM" and "PLESENT" strings graphic, which may be one of the prizes instead of Silver keys.

Adventures of Bayou Billy, The, Mad City

English versions:

(BUR) Hidden text (added 24.11.08):
There is a hidden version data inside ROM:
SAMP881226FOR-KONAMI.INC


Adventures of Captain Comic, The

(BUR) GameGenie (added 05.02.14):
ENSSIAEI+LESSTAAA-Somehow re-enables an infinite lives cheat. It should write to the internal variable a zero, but there is no register init for it. So we can just avoid writing the non-zero value to the variable. To enable this cheat, at the title screen hold A + B then press Start.

Adventures of Dino Riki, The, Shin Jinrui - The New Type

(FIX) Continue (added 07.03.07):
At the game over screen hold any D-Pad button then press Start.

Adventures of Lolo (US)

(UNI) Password generator:
Level:
Password:


Adventures of Lolo 2 (US), Adventures of Lolo (Japan)

(FIX) Secret passwords:
CSTM-Customize control settings
PROA-Pro level A
PROB-Pro level B
PROC-Pro level C
PROD-Pro level D

(UNI) Password generator:
Level:
Password:


Adventures of Lolo 3 (US), Adventures of Lolo 2 (Japan)

Japanese version:

(GEN) Secret passwords:
♥SNAKEY+MONSTER♥-Shows Snakey monster
♥LEAPER+MONSTER♥-Shows Leaper monster
♥SKALWG+MONSTER♥-Shows Skalwg monster
♥ROCKY++MONSTER♥-Shows Rocky monster
♥MEDUSA+MONSTER♥-Shows Medusa monster
♥GOL+GOLMONSTER♥-Shows Gal monster
♥ALMARK+MONSTER♥-Shows Almark monster
DONMEDUSAMONSTER-Shows Done Medusa monster
♥CAPOXX+MONSTER♥-Shows Capoxx monster
__00LOLO2BGMTEST-BGM test, type instead __ decimal number between 00 and 23.
__00LOLO2FGMTEST-FGM test, type instead __ decimal number between 00 and 48.

US version:

(GEN) Secret passwords:
♥SN#K☻Y+M!NST☻R♥-Shows Snakey monster
♥L☻#P☻R+M!NST☻R♥-Shows Leaper monster
♥SK#LWG+M!NST☻R♥-Shows Skalwg monster
♥R!CKY++M!NST☻R♥-Shows Rocky monster
♥M☻D*S#+M!NST☻R♥-Shows Medusa monster
♥G!L+G!LM!NST☻R♥-Shows Gal monster
♥#LM#RK+M!NST☻R♥-Shows Almark monster
D!NM☻D*S#M!NST☻R-Shows Done Medusa monster
♥C#P!XX+M!NST☻R♥-Shows Capoxx monster
__00L!L!3BGMT☻ST-BGM test, type instead __ decimal number between 00 and 23.
__00L!L!3FGMT☻ST-FGM test, type instead __ decimal number between 00 and 48.

Adventures of Rocky and Bullwinkle and Friends, The

(FIX) Level skip and free movement (added 04.02.14):
During the game, press B, A, A, Start, A, B, B, A on controller 2. A sound will confirm correct code entry. Then press B on controller 2 to jump to the next level. This code also allows you to free move your character to any position on the screen with the D-Pad buttons of controller 1 instead of jumping. Press Start on controller 2 to switch this cheat off and play the normal game mode. You can enable this cheat any time again.

Adventures of Tom Sawyer, Tom Sawyer no Bouken

(BUR) GameGenie (added 24.08.06):
IANXLOIZ (for the Japanese version)
IEOXAPLL (for the US version)
-Re-enable the Cheat Menu.
To enter to the Cheat Menu press rapidly Up then Down.
This cheat combination was disabled in the final release. It was meant to be enabled with the button code Up, Down, Down, Right, Left, Right, Right, Left, Up, Down, Down, Right, but on development stage it was shorted to first two buttons. Because of oddity of the keypress test routine, the button codes are saved just for a short period, so you need to enter this combination as fast as you can while cheat is triggers. A rapid pressing of this buttons should work at some moment.

After Burner, After Burner II

All versions:

(FIX) Reverse mode (added 06.02.14):
At the title screen, hold B on controller 2 and press Start on controller 1.

(UNI) Hardest mode (added 06.02.14):
At the title screen, hold Right + A + B + Select on controller 1 and Left + A on controller 2 at the same time, then press Start on controller 1.

(UNI) Removed cheat (added 05.02.14):
Just before the game over screen appears, when explosion animation is on the screen, rapidly press A on controller 2. The game will hang before you press A on controller 2 again. It seems that the real functionality was removed.

US version:

(FIX) Sound test:
Hold B on controller 1 before the title screen appears (at the console power up / reset or after the game over screen).

(FIX) Continue:
After the game over screen, when you returned to the title screen, press Left, Left, Left, B, B, B, A, A, Start. You will continue at the previously played level. The Continue code was meant to be 20-button, as in the Japanese version, and to help you enter it the confirming sound were added. It should play if at the title screen you press one more button to the 20-button Continue code. This confirming code is still in the US version and plays sound if you enter Left, Left, Left, B, B, B, A, A, A, A, A, A, A, B, Up, Up, Down, Down, Down, Down, Down, which is full version of the continue code with one more button added. But since in this version the Continue code was shortened just to 8 symbols, this button code isn't much helpful anymore.

(UNI) Extra missiles (added 06.02.14):
At the beginning of the stage 5, while refueling / reloading weapons on the ground, press Up + Right on controller 2 and A + Start on controller 1 at the same time and hold it during the take off. You'll get extra 40 missiles. This cheat was meant to be available at the end of refueling sequences at the stages 3, 5, 11, 16 and 21 with variety of extra missiles (20 or 40) and different button codes for each level, but in the final release there were an additional check added, so this cheat is available only on stage 5, and the button codes for all levels present in the unused array are the same. The Japanese version of that game have similar code without level restriction and button code uses just controller 2.

(UNI) Stage select (added 06.02.14):
During the game, press Select to pause it, then press Down + Left + A on controller 2 and Down + Left on controller 1 at the same time. Press Up or Down to select stage, press Select to play. This cheat can be done in all levels except 8 and 17. But you can still get to these stages with this cheat from any other stages. This cheat was completely removed from the Japanese version.

(UNI) Background test (added 05.02.14):
Hold Left + B on controller 1 and A on controller 2 at the same time before the title screen appears (at the console power up / reset or after the game over screen). Press Left or Right on controller 1 to change the menu options. Press Up or Down to select the menu option. Hold Select to hide menu. This cheat was completely removed from the Japanese version.

Japanese version:

(UNI) Sound test:
At the title screen, hold A, then press Start.

(UNI) Continue (added 06.02.14):
After the game over screen, when you returned to the title screen, press B, B, B, B, B, B, B, A, A, A, A, A, A, A, Up, Up, Up, Up, Up, Up, Start. You will continue at the previously played level. If you press additionally to the mentioned button code Up at the title screen, before hitting Start, and the last played game was ended less than on the third level of difficulty, then you'll hear a confirming sound. It means that continue cheat will work. This confirming sound still sitting in the US version but since the Continue button code was shortened just to 8 symbols, the confirming of the 20-buttons code isn't much helpful. ;)

(UNI) Credits (added 06.02.14):
Power the console on, wait for the 6 demo sequences has played, then press A, A, A, A, B, Up, Up, Down, Down, Down, Down, Down, Down, Start. The staff credits from the ending sequence will start. This cheat was removed from the US version, but some portions of code are still there. Fortunately, the ending sequence in the US version haven't any credits and just doesn't wort watching at all. ;)

(UNI) Extra missiles (added 06.02.14):
At the beginning of the stages 3, 5, 11, 16 and 21, while refueling / reloading weapons on the ground, hold on controller 2 the corresponding button code from the table below, and hold it during take off. You'll get extra amount of missiles depending on your current stage. Similar cheat is present in the US version, but available only on the stage 5, and the button code involves the controller 1 too.
Stage 3-Left-Extra 30 missiles
Stage 5-Left + B-Extra 50 missiles
Stage 11-Right-Extra 30 missiles
Stage 16-Right + B-Extra 50 missiles
Stage 21-Down-Extra 30 missiles

Ai Senshi Nicol (FDS)

(GEN) Stage select (added 21.07.15):
At the title screen, hold A + B and one of the following buttons and press Start to begin from corresponding level.
Right-Stage 2
Left-Stage 3
Source: ReyVGM

(GEN) Game pause (added 21.07.15):
Normally, when you press Start on controller 1, you access the items screen, but can't see the level anymore. Hold A on controller 2 additionally before pressing Start on controller 1 to just pause the game, without entering the items screen.
Source: ReyVGM

Ai Sensei no Oshiete - Watashi no Hoshi

(UNI) Sound test (added 29.06.13):
Hold A + B + Select on controller 1 then press Reset.

Aigiina no Yogen - From The Legend of Balubalouk

(GEN) Invincibility:
At the very first cave (Cave of Gize), reach the fourth room (it has fire and different music), pause the game and on controller 2 press A, B, B, Right, Up, Left, B, B, B, Left, Up, B, B, Right, Up, Down, Right, Right, Down, B, Right and then unpause.
Source: ReyVGM

Air Fortress

Japanese version:

(GEN) Second quest:
Enter as password words "GYUW", "AGOG", and "OOON" in sequence. Press Start after entering each word. Now enter any of the Second quest passwords or reset the console to play the Second quest from start. These passwords are unlockable and will be given to you after you beat the game. In the US version in other way, the second quest is unlocked automatically after you beat the game once and all passwords which you obtain during the Second quest will enable the Second quest levels automatically too. In the Japanese version you must enter these three passwords first every time, in order to play any of the Second quest levels.

Airwolf (Japan)

(FIX) Stage select (added 08.02.14):
At the title screen, press Up, Down, Left, Right, A, B, A, B on controller 2, then Start on controller 1. The stage select will appear before the weapon select screen.

(GEN) Music test:
At the title screen, press Up, Down, Left, Right, A, B, A, B on controller 2, then press A + B + Start.

(GEN) Invulnerability:
Start a new game. Hold A on controller 2 when the helicopter drop-off point appears, then press Up, Left, Down, Right, Down, Left, Up, Right on controller 1.

Airwolf (US)

(UNI) Skip to the last mission (added 29.06.13):
At the title screen, hold Up + B on controller 2 then press Start on controller 1.

(UNI) In-game pause (added 29.06.13):
During the game, press Select + Start on controller 1 to pause it. Press any button on controller 1 to unpause.

Akumajou Densetsu, Castlevania III - Dracula's Curse

(FIX) Sound test:
At the title screen, hold A or B or both buttons then press Start.

(GEN) Secret words:
Enter one of following words as player name:
HELP ME-Ten lives
AKAMA-Expert mode
OKUDA-Start with Alucard
URATA-Start with Sypha
FUJIMOTO-Start with Grant

(BUR) GameGenie:
YAUTAGZA-Enable "Debug menu" right before game start. You can select one of four rows by pressing Select and using A or B change it's values. First row represents a stage number to start with. Second row represents an act number for selected stage. Third row represents exactly which room you wanted to start with unused selected stage and act. Last option allow you to choose your partner. To start the game, press Start, but you will start with no extra lives, so you get a game over the first time you die.
Source: tcrf.net

Akumajou Special - Boku Dracula-kun

(GEN) Easter egg:
At the title screen, input the Konami code Up, Up, Down, Down, Left, Right, Left, Right, B, A. If you entered the code correctly, you'll hear a sound go off. Press Start and you'll get a black screen with the text "zannen deshita. nanimonai yo-n!", which means "too bad. there's nothing here!".

(BUR) Copyrights check (added 05.10.07):
As most games by Konami made after 1991 year game contain simple copyrights check, testing some parts of CHR and some bytes of PRG data. Then enables "no enemies" mode from second level.

(BUR) GameGenie (added 28.03.16):
ZZSKYGSZ+NLVGAGEU+ZASKZKZA-Re-enables the stage select screen after the title screen instead of main menu.
PAVLSYAA-There were more than one cheat meant to be available at the early developement stage. But later only Konami Kode easter is left and all other cheats data were removed. But cheat flag for the second cheat still exists and checking by the program. Using this game genie you may replace the empty Konami code easter with "Extra 50 lives" cheat. Just enther the same Konami code and start a new game for it.

Aladdin

(GEN) Stage Skip:
Pause the game and press A, B, B, A, A, B, B, A then any button to skip directly to the next stage.

Aladdin I/II/4 (JY Company), Popeye 2 - Travels in Persia

(BUR) GameGenie:
PAOEILAA-Enable second game mode "Popey - Travels in Persia"
ZAVVTPAA-Enable "Aladdin" title modifier 2 (usually "III" to the title)
LAVVTPAA-Enable "Aladdin" title modifier 3 (usually the same as "I"/"II")
GAVVTPAA-Enable "Aladdin" title modifier 4 (usually "SPECIAL")

(BUR) Hidden text (added 14.08.11):
Text
. Silvers LIN .
is used as RAM initialization string.

Aladdin 3, Magic Carpet 1001

(UNI) Power up (added 02.07.13):
During the game, every time you press B + Select, the power counter cycles from 0 to 4. So you could be virtually invulnerable if you press these button often.

Alien 3

(GEN) Level skip:
Pause the game and press Left, Right, Up, Down, Left, Right, A, B, A, B to advance to the next stage.

(BUR) Hidden text (added 18.11.08):
There is a hidden copyright message in ROM:
ALIEN3...NINTENDO ENTERTAINMENT SYSTEM.PROGRAMMED BY DARYL BOWERS FOR PROBE SOFTWARE.CHECKSUM FOR ROMS:
There is no checksums as text, probably there was some message but seems there is no cross-refrences to this string in ROM anymore.

Alien Syndrome

(GEN) Level select:
At the title screen, hold Down on controller 1 and Right on controller 2 at the same time, then press Start.

(GEN) Borrowed life:
Start a two player game. Press A + B after running out of lives to borrow one life from the other player.

(BUR) GameGenie (added 09.02.14):
PEOATIAA (for the Japanese version)
PEOAYIAA (for the US version)
-Re-enables the infinite lives cheat. At the player selection screen hold Up on controller 1 and Down on controller 2 at the same time, then press A on controller 1. Instead of number of lives, a "FREE" word will be displayed.

(BUR) Hidden text (added 09.02.14):
The RESET procedure in this game uses the string
OKABE000000000000000050000
to determine if game was hard or soft reset.

All-Pro Basketball, Zenbei!! Pro Basket

(UNI) Faster timer (added 10.02.14):
Hold Down + A on controller 2, then press Reset. Now, timer in game will be 2 times faster. Surprisingly, this cheat exactly the same as in Taito Basketball.

Alpha Mission, ASO - Armored Scrum Object

All versions:

(UNI) Continue (added 16.01.08):
At the game over screen quickly on controller 2 press A, B, Up, Down, B, A, Right, Left.

English versions:

(BUR) Hidden text (added 02.11.08):
Game ROM contains hidden copyright text:
PROGRAM SNK JR. PLANING MR. OBA DESIGN    RAMPTY   DR. GAG MUSIC SUGAR


American Dream

(FIX) Secret passwords (added 10.02.14):
AAAA AAAA
AAAA AAAA
AAAA AAAA
AAAA AAAA
COCO NUTS
-Free map movement. During the game, in the map mode, hold Select then use the D-Pad buttons to walk any place on the map, then release Select.
Source: ReyVGM

Ankoku Shinwa - Yamato Takeru Densetsu

(BUR) Hidden text (added 23.11.08):
There is a hidden copyright text in ROM:
1988ANOTHERltd.
and
Another Ltd. 1988/7/13


Antarctic Adventure

(BUR) Hidden text (added 26.11.08):
There is a hidden version text inside ROM:
RC804 1.0 850301


Arabian Dream Scheherazade, Magic of Scheherazade, The

US version:

(GEN) Secret passwords:
SOUND-Sound test
END-Ending sequence
1W-Level 1
2W-Level 2
3W-Level 3
4W-Level 4
5W-Level 5

(BUR) GameGenie (added 10.02.14):
GASEULEI-Re-enables the debug room select cheat. Press Select to enter the game menu, hold B + Start then press Select again. Continue holding the buttons, use the D-Pad buttons to change the hex number at the bottom-center of the screen, press Select to advance to selected room. This can be done also from control selection screen (press Start during the game), so you just need to hold B and hold Start to enable this cheat.

Argos no Senshi, Rygar

Japanese version:

(BUR) Password mode:
There is only text for additional menu item left. There is no passwords in the final version.
00019050: 48 13 0F 14 48 50 10 00 50 00 05 10 0D DA DB C8 .......y.y~..STA
00019060: D9 DB 08 10 4F 55 55 00 08 12 0F D7 C8 DA DA DE RT.....y...PASSW
00019070: C8 D9 CB 00 A6 0F E0 03 B0 06 A5 0F C9 1E 90 01 ARDy..Y|)...B..z


Argus

(UNI) Invulnerability (added 15.11.08):
At the title screen, hold Select on controller 2 then press Start on controller 1.

Arkanoid

(FIX) Level skip:
Any time you want during the game, hold A + Start to advance to another level. This only works up to 16th level.

(GEN) Continue:
To continue on the same level after you run out of lives, hold A + B on the title screen while pressing Select 5 or greater times. Release A + B and press Start.

Arkanoid 2

(GEN) Level skip:
While playing, hold A and press Start to skip levels. This only works up to 16th level.
Source: ReyVGM

(UNI) Continue:
At the title screen, press Down, B, Right, Left, A, A, Up, B.

(UNI) +50% Ball speed:
At the title screen, press Right, A, Down, B, Left, A, Up, B.

(BUR) Hidden text (added 09.12.08):
The RESET routine in this game uses string
MITSUGI
to check if game was soft or hard reset. This is name of main programmer Mitsugi Shimizu. Most interesting that this word writes in PPU memory and then checks after reset.

Artelius

(UNI) Debug mode (added 03.07.13):
Enter the "CONTINUE" menu, then press B, Right, Start, Right, Right, Select, Right, Left, Right, Right, Right, Left, Select, Left, Right, Select. Two-digit number will appears at the borrom-right corner of the screen. Press A to cycle from $00 to $1A, press B to return to continue menu. Numbers from $00 to $19 are level numbers, where you start when load any game. Number $1A will disable the background music.

(BUR) GameGenie (added 11.02.14):
ILVOVXGU-The final credits roll have an unused extra text string ("KAWATA"), which can be seen with this code.

Asterix

(UNI) Cheat menu:
During the game press Start to pause it. Then enter following code Up, Up, Up, Up, Up, Up, Up, Up, Down, Down, Down, Down, Left, Left, A, B, Right, Right, Right, Right, Right, Right, Right, Right, Left, Left, Left, Left, Up, Up, B, A. A sound will confirm correct code entry, then press Start and game will return to the title screen with extra "cheat" menu item.

(UNI) Invulnerability:
Enter the Cheat menu code, but before pressing Start to return to the main menu, hold Up + Right + A + B. Start a new game with any cheats as you wish and press Start to pause it again. Enter the Cheat menu code one more time. A sound will confirm correct code entry. Press Start to unpause the game. From this point you will be fully invulnerable.

Astro Fang - Super Machine

(UNI) Level select and infinite fuel (added 11.02.14):
At the title screen, press Up, Up, Down, Down, Up, Down, Down, A then press Start. As the stage map display screen press Select to select any stage. If you press B instead of A in this code, you will no longer care about fuel meter, you still can play even if it is empty.

(BUR) Hidden text (added 12.12.08):
There is some hidden copyright text in ROM:
GAME SOUND (C) COPYRIGHT 1990-03-20 SOFT MACHINE INC Nakakuma Akira
Also this game still contain the leftover text from the planned controller configuration menu, surprisingly, this game was meant to support a special controller device called U-Force.

Astyanax, Lord of King, The

(GEN) Sound test:
At the title screen, press Up, Down, Right, Left, Up, Down, Right, Left, Start.

(FIX) Demo select:
At the title screen, press Up, Up, Up, Down, Down, Down, A, and any other button, no matter which one, just to complete the sequence to 8 buttons, then press Start.

(UNI) Ending sequence (added 12.02.14):
Enter the Demo select cheat. At the Demo select menu press B, B, A, A, B, A, Up, Down, Start. At the end of this ending sequence a Japanese credits will be displayed, for some reason didn't removed from the US version, which is normally didn't displayed during normal game.

(FIX) Stage select:
Press Up, Down, Left, Right, B, B, B, and any other button, no matter which one, just to complete the sequence to 8 buttons, then press Start.

(FIX) Invulnerability:
Press Up, Up, Up, Up, Down, Left, Right, and any other button, no matter which one, just to complete the sequence to 8 buttons, then press Start.

Atlantis no Nazo

(UNI) Debug codes (added 15.11.08):
All codes should be entered at the title screen.
There is three internal counters for three buttons: Select on both controllers counts as the same value, A on controller 2, and B on controller 1. Each time you press one of these buttons, one of internal counters is increasing, regardless of it's order. When group of counters reaches the desired values, the final test performs for the pressed button combinations on both controllers. The program doesn't care which controller you use for the final combination, you can do any buttons on any controllers you wanted, only one condition must be performed: all desired buttons must be held when counters are reached desired values. Note, that when you press the final combination, internal counters continue to increasing, so if you press one of the "counted" buttons as part of the final combination after counters are reached desired values, your cheat won't trigger. So you must not use them in the final combination at all and use any other free buttons, or combine last counted pressing with final buttons held.
Thanks Joe for corrections.
Skip current zone-Counters condition: Select on controller 2 or controller 1 - 33 times, A on controller 2 - 22 times. Final combination: A + B.
Infinite lives-Counter condition: A on controller 2 - 11 times, B on controller 1 - 22 times. Final combination: not needed.
Invincibility-Counter condition: B on controller 1 - 33 times. Final combination: Up + Down + A + B + Select.
Then press Start on controller 1 to start a new game.

Attack Animal Gakuen

(GEN) Level select:
At the title screen, hold Down + Left then press B on controller 2. A lives counter at the top-left counter will represent selected level number from 2 to 7. Now hold A on controller 1 then press Start to start from the desired level.

(BUR) Hidden text (added 19.04.12):
The RESET routine in this game uses string
C.YAMAMO
to determine if game was soft or hard reset.

(BUR) GameGenie (added 19.04.12):
EASGZZAA-Enable simple memory viewer/editor. At the bottom-right corner of the screen a four-digit address and two-digit data string will appear. Press Start to pause the game then press Left or Right to switch between the digits, A or B to increase/decrease current address by 1, Up or Down to change address/data digits. All changes are applied immediately.

Attack of the Killer Tomatoes

(UNI) Frame advance (added 05.10.08):
Press Start to pause game, then by pressing Select you can advance the game frame by frame.

(UNI) Secret message (added 05.10.08):
After you left last life and before tomatoes eyes animation and message "TRY AGAIN TOMATO FACE" will appear, hold Down + Left + A + B. Instead this message another one appears: "ROB LOVES SANDY". Rob Harris is a programmer of this game.

B-Wings

(UNI) Level and weapon select (added 31.10.08):
Before triggering one of these cheats you should enable the cheat mode. On controller 1 hold Up then press A, then release Up. Repeat this for Right, Down, Left accordingly, each time holding it, pressing A, then releasing. After this, hold one of the buttons below for according cheat mode then press B. A sound will confirm correct code entry.
Right-Enable stage select.
Press Up or Down to select level. Select "CONTINUE" menu item by pressing Select replaced by "STAGE N" menu item then press Start.
Down-Enable weapon select.
Pause game by pressing Start then by pressing Select choose any weapon.
Left-Enable stage select and weapon select at the same time.

Babel no Tou

(GEN) Babel pro:
At the title screen, press Up, Up, Up, Down, Down, Down, Down, Down, Right, Right, Left.

(BUR) Hidden text (added 19.01.09):
In addition to generic NAMCO copyrights, RESET routine in this game uses string
MR TAKASI FUKAWA
to check if game was soft or hard reset.

(BUR) GameGenie (added 05.02.13):
GENYEIEI-There is a series of the Namco games, made by the same programmers Haruhisa Udagawa and Kumi Hanaoka, that contains the same self-test for the data integrity. To enable any of these tests you need a special device that should be plugged into the expansion port. The operation of that device is very simple. It should accept the data bit from the data input port and return it back inverted to the output data port. The device consists of 4-bit shift register, working as some sort of the FIFO buffer. The input bits are goes to the input and then shifted to te output after a 4 cycles. At the game's boot, it tries to send some special data to the device. If the data output doesn't match the data input inverted, then the game continues the normal operation. But if all data (usually 32, rarely 64 bytes) is matches, self-tests will be performed. The program calculates 24-bit partial checksums for the PRG (excluding the last 8K) and the CHR data, summing only every 15th byte, and comparing it against the etalon. Before testing of the PRG data, the background color turns red, before testing of the CHR data, it turns green. If any of these tests are failed, the program will jump directly to the reset routine. It means, one of these tests will be performed infinitely, but until the special device is plugged in, or until the test are passed. Normally, you'll see the red to green flash just before the game's boot. Or the static red screen if the PRG data is bad, or the flashing from red to green screen if CHR data isn't good. Using this Game Genie code you can skip tests for the special device presence and jump straight to the integrity tests.

Baby Boomer

(UNI) Level skip (added 03.07.13):
Any time during the game, hold Up + A on controller 1, then press B. This will enable the level skip cheat. Now, hold B then press Select on controller 1. Total 10 stages are available, after 10th, you will return back to the stage 1.

Back to the Future

(FIX) Disable music (added 13.02.14):
Pause the game, hold B, then unpause it. To enable music back, just pause / unpause the game without B is held.

(BUR) Hidden text (added 19.01.09):
There is a hidden copyright text in this ROM:
BACK TO THE FUTURE V1.21TVN 3/5/1989, BEAM SOFTWARE


Back to the Future II & III

(GEN) Start at 1875 (Part 3):
At the title screen, hold B then press Select to display the password menu. Enter "FLUXCAPACITORISTHEPOWER" as a password.

Bad Dudes, Bad Dudes vs Dragon Ninja, Dragon Ninja

US version:

(FIX) Extra 64 lives:
Press B, A, Down, Up, Down, Up on controller 2 at the title screen, then press Start on controller 1.

(FIX) Extra punch power:
Enter "64 lives" cheat but don't press Start, now press Up, Up, Down, Down, Left, Right, Left, Right, A, B on controller 2, then press Start on controller 1. Your punch power two times increased.

(GEN) Sound test (added ReyVGM):
After beating game, when last credit's message "data east usa corp." rolls out, American flag at the White House stops flutter. Then press Right, Left, Down, Up, A, A, B on controller 2 to make it flatter again. Press A to hear a music, press any other button then A or Start to return to the main menu.

Japanese version:

(FIX) Extra 64 lives:
Press A, B, Down, Up, Down, Up on controller 2 at the title screen, then press Start on controller 1.
Source: ReyVGM

(FIX) Extra punch power:
Enter "64 lives" cheat but don't press Start, now press Up, Up, Down, Down, Left, Right, Left, Right, B, A on controller 2, then press Start on controller 1. Your punch power two times increased.
Source: ReyVGM

(GEN) Sound test:
After beating game, when last credit's message "data east usa corp." rolls out, American flag at the White House stops flutter. Then press Right, Left, Down, Up, B, B, A on controller 2 to make it flatter again. Press A to hear a music, press any other button then A or Start to return to the main menu.
Source: ReyVGM

Bad News Baseball, Gekitou Stadium!!

(FIX) Play as Girls team (added 13.02.14):
Hold a combination of buttons Up + Down + Left using both controllers (you can press for example Down + Left on controller 1 and Up on controller 2, or Down on controller 1 and Up + Left on controller 2), then press Reset. A heart will appear to confirm correct code entry.

Bakushou! Star Monomane Shitennou

(GEN) Instant win:
Any time during the game hold Select on controller 1 then press Start.
Source: ReyVGM

(UNI) Unknown (added 28.11.08):
Any time during the game press Up + Left + A + B on controller 1. Seems this causes a permanent luck for any player. Need to investigate.

(UNI) Unfinished game (added 13.02.14):
Before the title screen, hold Left + Right on controller 1 then press Start. Start a new game, but instead of begin gameplay, you will continue some unfinished long-played game. Need to investigate.

(UNI) Mini-game mode (added 13.02.14):
Hold Up + Left + A + B on controller 1 and press Reset. Instead of generic game demo loop, you'll see all playable characters in sequence, then will play all mini-games in row until you loose, then return back to the normal game mode. Need to investigate.

(UNI) Slow down the dice roll (added 13.02.14):
During the game, on the second part of the turn, when the letter dice is rolling, hold Left + Right on controller 1 to slow down it, and you can easily select desired dive values.

Bakushou!! Jinsei Gekijou 2

(UNI) Expanded mapper regs check (added 03.07.13):
Hold Up + Down + Left + Right on controller 2, then press Reset. Press A on controller 1 to start a mapper test. If fail (most emulators), the "NG" will be displayed on the red background and game will go to the infinite loop. In other case, the "OK" message will be displayed on the green back for the short time then game will return to the title screen.

(UNI) Sound test (added 03.07.13):
At the title screen, press Up, Down, Up, Down, A, B, Right, Left, Right, Left, Select, Select, A, B, Select, Select, Up, Right, Down, Left, a small number will appear at the bottom-right screen corner. Use Up or Down to change number from 0 to 255, press A to play music (0-31), press B to play sound effects (0-36), press A when number is 255 to enable the microphone test. The rest of the numbers are lead to the program crash.

(BUR) Events test (added 03.07.13):
Set the $304 variable value to $20. During the game press Start or Select to change the number at the top-right corner of the game's HUD. The next move will display only the one event with that number.

Banana

(UNI) Stage select (added 04.07.13):
Start a new game, make three steps down from the starting point, hold A + B on controller 2 then press Reset.
Start a new game again, press A + B on controller 1 to die once, after continue make three steps down from the starting point, hold A + B on controller 2 then press Reset.
Start a new game for the third time, press A + B on controller 1 two times to die twice, after continue make three steps down from the starting point, hold A + B on controller 2 then press Reset.
Finally, start a new game for the fourth time, press A + B on controller 1 two times to die twice, after continue make three steps down from the starting point, press A + B on controller 1 to die for the third time, at the game over screen hold A + B on controller 2.
The game will return to the title screen automatically without a reset. If all done right, the title menus and text color will change from orange to magenta (or blue, if combined with the cheat below).
Now you'll be able to increase or decrease the level counter by 1 instead of 5, just hold A + B on controller 2 and press Left or Right on controller 1.
Additionally you can instantly win the current level by pressing Up on controller 2 during the game, or return back to the previous level by pressing Down on controller 2 during the game. Returning back from the first level will lead you to the stage 0, which is actually an ending.

(UNI) Full items, Extra 8 lives (added 04.07.13):
At the title screen, select the level 101 and start a new game. Press A + B on controller 1 two times to die twice, then press Reset.
At the title screen, select the level 101 and start a new game one more time. Press A + B on controller 1 three times to die three times, then press any button to return back to the title screen automatically.
If done right, the title screen menu text will change from orange to pink (or blue if combined with the cheat above).
Now you can start a new game with maximum 8 lives, and 255 of bombs, ladders, ropes and stones if hold A + B on controller 2 before the game start.
Additionally, before pressing A + B on controller 1 to die, hold A or B on controller 2 to disable lives decreasing.
When using this cheat, when the game is over, your scores will be erased.
This code additionally will return you back to the title screen after completing the last 105th level instead of showing the ending sequence. To view the ending sequence, at the stage 105 complete screen hold Up on controller 2.
Even more secrets are available! You could PLAY the demo stage either. Before the demo sequence start, at the title screen, hold A + B on controller 1 and controller 2 controllers at the same time.

(FIX) Complete a level:
At the title screen, select stage 46, press A + B on controller 1 to commit suicide 3 times until you get a game over and go back to the title screen. Now, select any level, and while playing press Up + A + B on controller 2 to complete the stage. When using this cheat, after the game is over, your score will be erased.
Source: ReyVGM

Banana Prince, Bananan Ouji no Daibouken

(UNI) Debug menu:
Hold Left + A + Select + Start on controller 1 then press Reset.

(GEN) Secret ability:
While playing, hold Down + B for 3 seconds and then immediately press Up + B.
Source: ReyVGM

(BUR) GameGenie (added 14.02.14):
SZVLZTIK+SLVLLVOL-Re-enables some leftover secret message identical to the the "Doki! Doki! Yuuenchi" easter by the same developers. To see it, enter the Debug menu and press B. There is no code to call it in the right way, and althought the 99 lives are added when used this code, they will be overwritten by the debug menu code and just doesn't work.
GEKUVOGK-Re-enables ingame debug handler. Pause the game, press A to change the weapon, press B to max it power. There are more debug variables, but they aren't used in the final game.

(UNI) Password generator:
Level:
Unknown:
Weapon:
Password:
Note:0 - full banan
1 - half refined banan
2 - full refined banan
3 - banana peel


Barbie

(UNI) Secret message (added 17.12.08):
Hold Select, then press Reset, continue holding Select at the initial copyright screen and press quickly A, B, Up, Down, Left, Right, A, B. You must hurry, because this code can be entered only first five second during copyright screen show up. Upper copyright strings will change to "CHRISTINE, ROBERT, SCOTT, VICTOR, JEFFERY WESTEFELD" strings. Release all button and press A + B on controller 1 to return all normal copyrights back.

Bard's Tale, The - Tales of the Unknown

Japanese version:

(GEN) Sound test (added 16.01.14):
At the title screen, hold Up + B + Start and press Start.

Bard's Tale II, The - The Destiny Knight

(UNI) Secret words (added 17.02.14):
Enter one of this words as a player name while creating a new character.
もんすたーもにた-Monster Monitor. Shows you every monster in the game, the last one will stop the program.
えんかうんと-Encounters. The same as previous.
おんかくせれくと-Music Select. Use the D-Pad buttons to select music or sound effects, press A to play SE, music will be played automatically.
いちまいえもにた-Picture Monitor. Shows you every single picture of the place or person in the game.

Baseball Simulator 1.000, Choujin - Ultra Baseball

(BUR) GameGenie (added 06.07.08):
LANNPONY (for the Japanese version)
LANNTONY (for the US version)
-Re-enables a simple memory viewer/patcher cheat. Any time during the game press A + B + Start to enter it, press Select to exit back to the game.
LAXVANNY (for the Japanese version)
LAXVTNNY (for the US version)
-Re-enables a complex debug mode cheat. Hold A + B + Select then press Reset, to enter it, press Select + Start to exit back to the game.

Baseball Star - Mezase Sankanou!!, Baseball Stars

US version:

(FIX) Super team:
Select the "Make Team" option from the main menu. Then press Down, Right, Left, Down, Down, Right. Doesn't matter what team strength you are select after that, so just let it be at the "?" option by default. Press A to enter the team name edit screen. A team name "WHEN ISNT IT?" will be displayed. Change it to "WHEN IT IS." including punctuation, then select "END" and now enter a real team name. Complete the team making procedure. Now, team you've created has a lot more power than any other teams.

(FIX) Women's team:
Select the "Make Team" option from the main menu. Now, move the cursor to the "Veterans" strength option, then select any other option. Repeat selecting and deselecting the "Veterans" three more times, so this should be a 4 times in total you've selected this option. You can now select any other than "Veterans" strenght to your new team, just don't select the "Veterans" option anymore. Press A to enter the team name edit screen. A team name "WHAT IS A WREN?" will be displayed. Change it to "A BIRD." including punctuation, then select "END" and now enter a real team name. Complete the team making procedure. Now, team you've created will be consists of woman instead of men.

(FIX) Super women's team:
Combining two cheats above will give you the Super women's team after all. First you need to enter the Super team cheat sequence. Note, that while you doing this, you've selected the "Veterans" team once already. When done, do the same procedure as in the second cheat of selecting deselecting the "Veterans" option 3 more times. Press A to enter the team name edit screen. First you'll be asked "WHAT IS A WREN?", write a correct answer, select "END", then you'll be asked "WHEN ISNT IT?", write a correct answer one more time, then you'll be finally asked about the real team name. When you complete the team making, you'll obtain a Women's team with maxed out parameters.

Japanese version:

(UNI) Super team (added 17.12.13):
Select the "チームつくり" option from the main menu. Then press Down, Right, Left, Down, Down, Right. Doesn't matter what team strength you are select after that, so just let it be at the "バラバラ" option by default. Press A to enter the team name edit screen. A team name "すとくいんの しものくは" will be displayed. Change it to "われてもすえに あわむとぞおもふ", then select "おわり" and now enter a real team name. Complete the team making procedure. Now, team you've created has a lot more power than any other teams.

(UNI) Women's team (added 17.12.13):
Select the "チームつくり" option from the main menu. Now, move the cursor to the "Veterans" strength option, then select any other option. Repeat selecting and deselecting the "Veterans" three more times, so this should be a 4 times in total you've selected this option. You can now select any other than "Veterans" strenght to your new team, just don't select the "Veterans" option anymore. Press A to enter the team name edit screen. A team name "おののこまちの しものくは" will be displayed. Change it to "わがみよにふる ながめせしまに", then select "おわり" and now enter a real team name. Complete the team making procedure. Now, team you've created will be consists of woman instead of men.

(UNI) Super women's team (added 17.12.13):
Combining two cheats above will give you the Super women's team after all. First you need to enter the Super team cheat sequence. Note, that while you doing this, you've selected the "Veterans" team once already. When done, do the same procedure as in the second cheat of selecting deselecting the "Veterans" option 3 more times. Press A to enter the team name edit screen. First you'll be asked "おののこまちの しものくは", write the correct answer, select "おわり", then you'll be asked "すとくいんの しものくは" write correct answer one more time, then you'll be finally asked about the real team name. When you complete the team making, you'll obtain a Women's team with maxed out parameters.

Bases Loaded 3, Moe Pro! '90 - Kandou Hen

(UNI) Unknown (added 06.07.13):
Hold A + B then press Reset. The meaning isn't clear. The cheat flag used for select from two different data sets and two code handlers while moving on the field and bating.

Bases Loaded 4, Moe Pro! - Saikyou Hen

US version:

(FIX) Music test:
At the title screen, enter the "PLAY" option, then hold A + B on controller 2 and the press Start or A on controller 1 to get to a sound test screen. The same code at the title screen without entering the "PLAY" option works the same as entering "OPTIONS", no matter what manu option is selected.

Japanese version:

(FIX) Music test (added 18.02.14):
At the title screen, do not enter any menu options, hold A + B on controller 2 and the press Start on controller 1 to get to a sound test screen. This code is unlockable and given to you by one of the ending staff messages, which is absend from the US version.

Batman - Return of the Joker, Dynamite Batman

(GEN) Sound test:
At the title screen, hold A + Start.

Batman Returns

(FIX) Ending easter 1 (added 22.07.15):
During the ending's staff sequence, hold Start on controller 1 to make one of two characters running at the bottom of the screen. The character type depends on your ending type: for two good endings this is a stage 2-3 boss Catwoman, for two bad endings this is a stage 1-2 boss.

(GEN) Ending easter 2 (added 22.07.15):
After the ending sequence is over and copyright message appears, press either A or B on controller 1 to animate the penguin.

(UNI) Repeat ending sequence (added 25.06.08):
After the ending sequence is over and copyright message appears, press Left + A + B on controller 2.

(UNI) Extra batarangs (added 23.07.15):
During some cutscenes between levels, hold Start on controller 1 and A + B on controller 2 at the same time and press Select on controller 1 to skip the cutscene or just wait to cutscene is over. If done right, you'll start a new stage with 10 batarangs instead of 5. This cheat isn't working at the intro cutscene before stage 1-1. Also, you can use this cheat at the cutscene before stage 4-1, but there are no batarangs used in a car driving sequence, so this will help only in the next regular fighting stage.

(BUR) Copyrights check (added 23.07.15):
As most games by Konami made after 1991 year, this game contains some simple copy protection. During the game, there are two particular places, where the protection checks is performed. The first one occurs at stage 2-3 during the battle on the Ivory Tower, where it constantly check for the presence of the part of the title name data. The second one performed at the second part of stage 2-2, once when a helicopter bomber enemy appears on the screen and checks for Konami logo tilemap in the PRG-ROM. If one of these tests fails, the special protection flag is raised. There are two main effects triggered. First, at the stage 3-1, it will change its state so if you had already recorded the Penguin's conversation, but the flag for this event isn't raised at the same time, renders this level unbeatable. Second, any correctly generated passwords obtained after protection is triggered (even after the game over and beginning of the new game), will fail at the password entry screen. This flag only will reset if you enter the clean password or reset the system.

(UNI) Password generator (added 22.07.15):
Some notes about the password system and the game itself:
1. Stage 6-1 doesn't generate any passwords normally during the game, because there is no fatal events on it, you just can't die there. But you still able to get to this stage with the custom generated password.
2. The "Damage taken" counter is what you've got every time you get a hit from enemy or die. Regular hits add 8 times of the hit power value to this counter, the game over add 1024 instantly. The amount of continues you may use is unlimited, but the more you die or get hits, the bigger the damage counter. There are two main effects depends on it:
 a) the amount of HP you got refilled after continue; calculated as 0x28+(damage/128), but not much than your current HP capacity
 b) the different endings; less damage counter, more detailed the ending
 There are total 4 ending variants. Two are the good ones, two are the bad.
  1. The damage counter above 14848: only the staff roll with the stage 1-2 boss easter and the final message "YOU TOOK TOO MUCH TIME TO GET HERE. TRY GETTING HERE SOONER."
  2. The damage counter between 14848 and 9984: additional bat signal screen before the staff, the same stage 1-2 easter and the message "YOUR SKILL HAS IMPROVED, BUT YOU'RE NOT A REAL HERO YET."
  3. The damage counter between 9984 and 5376: the full demo sequence with the scene of the Penguin death, following the bat signal and staff roll with stage 2-3 boss Catwoman easter instead, and the message is "CONGRATULATIONS! BATMAN,YOU'VE SAVED GOTHAM CITY."
  4. The damage counter less than 5376: additionally a Catwoman picture appears on the bat signal screen, and the final message is "AWESOME! YOU ARE THE HERO OF ALL HEROES."
3. The "Game start" flag is used to determine if you access the password menu after the game over screen or you just powered up the console. Depends on it will or not clear some game variables. This prevents the game parameters and flags from erasing between game plays, and even if you choose "END" at the game overs screen, you can always go to the password menu and enter the default generated passwords (which is the same as on the game over screen) and continue the game. However, this flag is set to 1 ALWAYS when you start a new game or continue one way or another, it's is only has value 0 before the first game play after the reset. So technically, every password generated by the game after the game is started has this flag set, and only 4 random default passwords generated after the game reset, has this flag clear. When you generate any valid password, doesn't matter if you set this bit or not.
4. The "Test tube" flag is a special item, not displayed on HUD, but you can obtain it on stage 2-2 inside the cat's eye on the background after beating two trident armed enemies. Used automatically on the stage 2-3 boss Catwoman, cuts its HP by half.
5. The "Conversation" flag is set when you record the Penguins conversation in one of the rooms of the stage 3-1. This will change the level layout and allows you to complete it. You can't avoid setting this flag during the normal game, generated passwords with this flag set lead to the second part of the stage.
6. Also there is a special anti-pirate flag, if set, it makes any valid passwords not working. Here this flag is forced to be disabled for obvious reason.
7. There are two special debug flags, that can't be set during the game, and may be only generated. The invulnerability flag disables the HP decreasing. The Level Select flag is another debug leftover, allows you any time during the game, except the cutscenes, change current stage up to stage 4-2 instantly by pressing Left or Right on controller 2. The stages above 4-2 can't be accessed with this cheat.
8. "Box in hand" and "Box filled" are represents the special HP storage item. First is for amount of this items in your posession (given to you instantly after the stage 1-2 boss, the rest are hidden at some places). The second is amount of filled ones with HP. Actual HP counter in this game is 8-bit in size, so can contain as much as 255 HP. Only 64 HP is displayed in the HP bar on HUD, this takes only 6 lower bits of the number. When calculating your HP, the game will check for amount of boxes in posession and fills the higher two bits of the HP depending on it. So normally during the game you can't get the HP counter more than 64+(box*64) value. However, game doesn't check this when you lose your HP and decreasing it as if it full 8-bit value, so with this password generator, you can set "Hitpoints" + "Box filled" vealues to maximum to get 255 HP ingame without posessing the boxes at all. Unfortunately, the HP will be dropped back to 64 after the first continue.
9. And finally, there are two unused bits in passwords, that can be used for unique passwords generation, but doesn't appears to have any effects during the game.
Level:Game start :
Random:Test tube:
Hitpoints:Conversation:
Damage taken:Invulnerability:
Box in hand:Level Select:
Box filled:Unused:
password:


Batsu & Terii

(UNI) Level select:
At the title screen, press Up, Down, Left, Right, Up, Down, Left, Right on controller 2 then select desired level (only worlds 1, 2, 5, 6 are available) by pressing B on controller 2 corresponding number of times, then start the game:
1 time-World 1, Level 2
2 times-World 1, Level 3
3 times-World 1, Level 4
4 times-World 2, Level 1
5 times-World 2, Level 2
6 times-World 2, Level 3
7 times-World 2, Level 4
16 times-World 5, Level 1
17 times-World 5, Level 2
18 times-World 5, Level 3
19 times-World 5, Level 4
20 times-World 6, Level 1
21 times-World 6, Level 2
22 times-World 6, Level 3
23 times-World 6, Level 4

(UNI) Extra 5 health:
At the title screen, press Left, Left, Left, Left, Right, Right, Right, Right, Left, Left, Left, Left, Right, Right, Right, Right on controller 2 then start the game.

(UNI) Extra weapon:
At the title screen, press A, Up, B, Up, A, Down, B, Down, A, Left, B, Left, A, Right, B, Right on controller 2 then start the game.

(UNI) Extra 99 hearts:
At the title screen, press Up, Up, Up, Up, Right, Right, Right, Right, Left, Left, Left, Left, Down, Down, Down, Down on controller 2 then start the game.

(UNI) Extra 30 seconds:
At the title screen, press A, Up, Left, Left, B, A, Right, Down, Right, Left, Right, Up, A, Down, A, Up on controller 2 then start the game.

(UNI) Extra 99 lives:
At the title screen, press A, A, B, A, B, B, A, B, B, B, B, B, A + B, A + B, A + B, A + B on controller 2 then start the game.

Battle Baseball

(UNI) Sound test:
Hold Up + A + B + Start when "Banpresto" logo appears.

(GEN) The Final Team:
At the game menu, select the top option, then select the 1st or 3rd option. Pick your team and play a game (or let the computer play them, it's way faster). After finishing a game, you'll see a news anchor giving the results of the games. On the very last message he gives, press A + B on controller 2 until the Hero All Stars Team challenges you.
Source: ReyVGM

(GEN) The Same Team:
At the menu screen, choose the lower left option, then Vs Game. Now, while choosing your team, hold Select + Start on controller 1 and you'll be able to chose the same team as your opponent.
Source: ReyVGM

Battle City

Console version:

(UNI) Secret message (added 23.04.07):
At the title screen, select "construction" menu item then press Start on controller 1 to enter this mode and again Start to return back to the title screen. Repeat this 7 times. After that hold Down on controller 1 and press A on controller 2 8 times. Finally, hold Right on controller 1 then press B on controller 2 12 times. Press Start on controller 1. Message "THIS PROGRAM WAS WRITTEN BY OPEN-REACH WHO LOVES NORIKO" appears.

(BUR) GameGenie (added 23.03.08):
IIOKYXAZ-Enable in-game debugging routine allow you to view memory data. Press B or Select to change address in Zero memory page. Pressing to A should been increase address to $10 but as side effect of this GG code it causes end of stage. Some hex letters was overwritten with other data in final release, so numbers with "a", "b", "c", "d" letters cannot be displayed properly.
Source: Griever

(BUR) Hidden text:
COPYRIGHT 1981 1985 NAMCO LTD.
ALL RIGHTS RESERVED
RYOUITI OOKUBO
TAKEFUMI HYOUDOU
JUNKO OZAWA


(BUR) Hidden text:
At the end of PRG-ROM lies some small ASCII like art with 6 kanji combined in two groups by 3 kanji - two small at the top, one large at the bottom of each group. Kanjis means some words: "大久保" ("Ookubo") and "宇田川" ("Utakawa"). First one is Last name of game programmer, second one - street name it Tokyo, where just now opened entertainment complex "NAMCO INTI SHIBUYA". Back in 1985 year there was small developer company "TomCat System" where Ookubo Ryouiti was working and who develop "Battle City" game for NAMCO company.

Arcade version:

(UNI) Stage select (added 21.11.08):
Insert credit then hold A + B on controller 2 and press Start on controller 1. You must choose desired level in 10 seconds.

Battle Fleet

(BUR) GameGenie (added 05.02.13):
GEXVLAEI-Some of the Namco games, which uses the 19 mapper PCB, contains also the specific self-test routine. It can test and initialize the internal RAM buffers. Similar to the other Namco games series, in order to run these tests, you must plug in a special device to the famicom expansion port. This device is much simpler than mentioned another device. It just takes one bit of data and immediately returns it inverted to the data port, there is no FIFOs inside. When the program detects the device presence, it performs RAM test and initialization. If RAM is already tested/initialized, the screen will turn blue. If RAM isn't initialized, but after init and test all is fine, then screen will turn yellow or pink. If, even after the reinitialization, RAM test fails, then screen will turn red. After the tests, program goes to the infinite loop, so yo must unplug special device to boot into the game. Using this Game Genie code you can skip the special device check and just directly to the RAM initialization routine. This game tests it's IRAM buffer, used for the expansion sound.

Battle Formula, Super Spy Hunter

(GEN) Hyper tennis:
After the game over screen, put cursor to the CONTINUE option, then press A 8 times to put turrets on it straight down and then press Start. You may play with second player or with CPU. Defeat CPU to continue game play with 20 extra lives.

(FIX) Full equipment:
Pause the game, then press Up, Up, B, Right, Right, B, Down, B, Down, B, Left, Left, A.

(FIX) Extra lives (added 18.02.14):
Hold Select and press Start at the title screen. Various numbers will appear on the screen. The number that remains on the screen indicates the number of lives available at the game start, up to twelve lives.

(UNI) Anti continue (added 18.02.14):
Normally, continues in this game are unlimited. For some unknown reason, you can limit it with maximum 80 continues. Just before the title screen is show up (during the game boot or after selecting the "END" option at the game over screen), hold Start. Start a new game, and after exactly 80 continues you'll be returned back to the title screen immediately after the game over screen.

Battle Stadium - Senbatsu Pro Yakyuu

(UNI) Debug mode:
At the main game menu, select the bottom-right ("power off") option, when "oyasumi..." ("good night") message appears on the screen, press Up, Up, Down, Down, Right, Left, Right, Left, A, B, Start.

(UNI) Second player time out (added 19.02.14):
Usually, during the game the second player couldn't pause it and change the game settings, just like it can be done by the first player. To enable the ability to the second player to pause the game, on controller 1 hold A + B, then press Reset. Now during the game, if the second player will shout to the internal microphone on controller 2 for a one or two seconds constantly, the pause will be triggered.

(BUR) GameGenie (added 19.02.14):
PGONLLPK+EYONGLEI-Re-enables more hidden options in the debug menu as well as simple Debug Mode access cheat. To get to Debug Menu, just hold A then press Reset. Previously unused options in the Debug Menu now can be used. Need investigate, what exactly they do. Some of them are writing some signatures to the SRAM, some toggles unknown flags, seems unused now.
The game is checking if game in full debug mode or not by checking SRAM signature. In the release version it is "IGS", but for the debug version it should be "ALF". This game genie code just fool the debug signature check.

Battle Storm

(UNI) Ending sequence:
At the title screen, press Up, Left, Down, Right, A, B.

(UNI) Sound test (added 19.02.14):
At the title screen, press Up + Left + B + Select.

(UNI) Super challenge 1 (added 19.02.14):
Enter the Sound Test mode. Point the cursor to the music called "THE CHALLENGE" and press Right + Select + Start.

(UNI) Super challenge 2 (added 19.02.14):
Enter the Sound Test mode. Point the cursor to the music called "THE CHALLENGE" and press Left + Select + Start.

(UNI) CPU vs CPU (added 19.02.14):
During the game, press Start to pause it. Press Down + Left + B + Select. Select with Up or Down the player control mode "COMPT" to give the control of your side to the computer, now two computerw sill fight each other. Select "HUMAN" to return the controls to the human back again. This cheat can't be done in two player mode and the Challenge battles mentioned above.

Battleship

(UNI) Secret passwords:
0914-Unlimited weapons
0528-Shows enemy grid after the player's grid when push Start

(UNI) Sound test (added 19.02.14):
At the title screen, press Select on controller 2 to cycle the background music from the whole game.

Battletoads

(GEN) Extra 5 lives:
Hold Down + A + B and press Start at the title screen or continue screen on any controller (both players can get the extra lives). An explosion will confirm correct code entry.

Battletoads & Double Dragon - The Ultimate Team

(FIX) Extra lives:
Hold Up + A + B and press Start at the player selection screen or continue screen on any controller. (both players can get the extra lives).

(UNI) Warp zone Extra 5 Lives:
Press B, A, Down, B, Up, Down ot the player selection screen. A sound will confirm correct code entry. Press Start to enter Level selection menu up to 5-2 level and you'll start with extra 5 lives.

(GEN) Super Warp zone Extra 10 Lives:
Press Down, Up, Up, Down, A, B, B, A at the player selection screen. A sound will confirm correct code entry. Press Start to enter Level selection menu up to 7-1 level and you'll start with extra 10 lives.

Beauty and the Beast

(BUR) Hidden text (added 16.11.08):
There is a hidden copyright message in ROM:
beauty and the beast music and soundeffects (c) 1993 jeroen tel / maniacs of noise


Bee 52

(FIX) Cheat mode (added 20.02.14):
At the splash screen with Bee, before the stage number screen or the level restarting, enter one of the following button sequences then press Start to apply corresponding effect. The message "cheat!" will appear at the bottom of the screen to confirm correct code entry.
A, Up, Down, Left, Right-Extra 5 Lives (available only before the stage screen)
B, Up, Up, Up, Right-Level 5 (available only before the stage screen)
Select, B, B, B, Left-Level 9 (available only before the stage screen)
Up, Up, B, A, B, A-Do not clear powerups and items after death (useful only after death)
Down, Down, Up, Up-Water can't dodge you back (available at any splash screen, need to be reentered any time after death)
Left, Left, Right, Left, A-Level 13, Enables gravity (available only before the stage screen)
Right, A, B, A, B-Junior bee option, twice the weapon power, and defends from the instant death once (available at any splash screen, can be reentered after death)

(UNI) Smiley test:
Absolutely all games by Codemasters have internal PRG ROM and CHR RAM testing routines. So called "Smiley tests". Tests are normally enabled, but for triggering it needs pressing all D-Pad buttons. Hold Up + Down + Left + Right + A + Select + Start to enter the PRG ROM test or hold Up + Down + Left + Right + B + Select + Start to enter the CHR RAM test, and press Reset. A green smile means that test passed, red sad face - failed.

Beetlejuice

(BUR) Hidden text (added 17.11.08):
There is hidden copyright text in ROM:
* Written by Paul Machacek *


Best Keiba - Derby Stallion

(GEN) Sound and CHR test:
At the title screen, hold Right on controller 2 and press Start on controller 1.
Source: ReyVGM

(UNI) Horse stats (added 21.02.14):
During the game, in the stables, select any horse from the left part of the field, then on the info screen hold Right + B on controller 2 and press A on controller 1 to see all numerical parameters of the selected horse.

(UNI) Ending sequence (added 21.02.14):
At the title screen, while demo race is in progress, hold Up + B on controller 2 and wait for the end of the race.

Best Play Pro Yakyuu

(UNI) Debug menu:
Choose first option at the main game menu ("リーグデータ" or "league data") then select 2nd team name, press A, then edit it to そのべ and return to main menu by pressing B twice. Press Select, Right, Left and menu will appear. You can listen game music and view ending and other sequences.

(UNI) SRAM clear (added 22.02.14):
Before the powering the console on, hold A + Select.

(UNI) Autoplay mode (added 22.02.14):
Start a new game with two CPU controlled players. At the team presentation screen press A + Select. The message "AUTOPLAY" will appear. This will change some internal CPU behaviour, while playing agains each other. Need investigate.

Best Play Pro Yakyuu '90

(UNI) Debug menu:
Choose first option at the main menu ("リーグデータ" or "league data") then select 2nd team name and edit it to the そのべ (to enter edit mode, press A at the team name, then move cursor Up and again press A, edit name, press B to exit edit mode), return by pressing B to main menu and choose second option at the main menu ("日程表" or "にっていひょう" or "shedule"), move cursor down 13 times to set blue bar to the next to last position. Then return to main menu again and press Start at the currently selected menu option. You'll be able to hear the music, view ending and other sequences and edit custom sounds with sound editor.

Best Play Pro Yakyuu Special

(UNI) Debug menu:
Choose first option at the main game menu ("リーグデータ" or "league data"), select any league then select 2nd team name and edit it to そのべ (to enter edit mode, press A at the team name, then move cursor Up and again press A, edit name, press B to exit edit mode), return by pressing B to main menu and choose second option at the main menu ("日程表" or "にっていひょう" or "shedule"), move cursor down 12 times to set blue bar to the next to last position. Then return to main menu again and press Select at the currently selected menu option. You'll be able to hear the music, view some winning sequences and edit custom sounds with sound editor.

Best Play Pro Yakyuu II

(UNI) Debug menu:
Choose first option at the main game menu ("リーグデータ" or "league data") then select 2nd team name and edit it to そのべ (to enter edit mode, press A at the team name, then move cursor Up and again press A, edit name, press B to exit edit mode). After that, select 5th team name and change it to すだぴん the same way. Return to the main menu, point cursor to second option at the main menu ("日程表" or "にっていひょう" or "shedule") and press Start. You'll be able to hear the music, view ending and other sequences and edit custom sounds with sound editor.

Best of the Best - Championship Karate

(UNI) Secret words (added 17.11.08):
Enter one of following words as first player name. Note: there is two spaces before and three spaces after words in name.
"  LAYER   "-Your opponent health level down from 255 to 10.
"  OLRAC   "-Secret copyright message: "Conversion on NES by Movie Software (Perconti Carlo) Fax number: 33 1 60084528".

Bible Buffet

(BUR) GameGenie (added 21.03.11):
ELEPNYUX+VZEOENEZ-Re-enables Sound Test mode from another Wisdom Tree game - "Spiritual Warfare", just press Reset.

Big Nose Freaks Out

(UNI) Smiley test:
Absolutely all games by Codemasters have internal PRG ROM and CHR RAM testing routines. So called "Smiley tests". Tests are normally enabled, but for triggering it needs pressing all D-Pad buttons. Hold Up + Down + Left + Right + A + Select + Start to enter the PRG ROM test or hold Up + Down + Left + Right + B + Select + Start to enter the CHR RAM test, and press Reset. A green smile means that test passed, red sad face - failed.

Big Nose the Caveman

(UNI) Smiley test:
Absolutely all games by Codemasters have internal PRG ROM and CHR RAM testing routines. So called "Smiley tests". Tests are normally enabled, but for triggering it needs pressing all D-Pad buttons. Hold Up + Down + Left + Right + A + Select + Start to enter the PRG ROM test or hold Up + Down + Left + Right + B + Select + Start to enter the CHR RAM test, and press Reset. A green smile means that test passed, red sad face - failed.

(UNI) Hidden credits (added 22.02.14):
At the Codemasters logo hold A + B + Select + Start before the title screen appears. Instead you'll see a hidden credits.

(BUR) GameGenie (added 25.04.14):
PAUGTAAA-Re-enables the Stage Select after selecting of the one or two player mode.
PAUGYAAA-Re-enables the Infinite lives debug feature
PAUKAAAA-Re-enables the Free shop debug feature
AAUKPAPA-Switches the game to the "Galoob" publisher mode with different logos and copyrights.
Source: tcrf.net

Bikkuri Nekketsu Shin Kiroku! - Harukanaru Kin Medal, Crash 'n the Boys - Street Challenge

(BUR) Hidden text (added 16.12.07):
There is some hidden text list present. String index only initialized by 0 at the game start, and nothing seems points to strings output routine. Cheat seems to be totally disabled.
00004560: 00 00 00 C1 00 C1 00 C1 00 00 23 18 1F 20 00 00 000.0.0.00SHOP00
00004570: 00 00 20 1E 1F 00 24 15 23 24 23 1E 14 00 24 15 00PNO0TESTSND0TE
00004580: 23 24 23 29 1F 1B 25 23 29 25 12 11 13 1B 24 15 STSYOKUSYUBACKTE


Bill Elliott's NASCAR Challenge

(UNI) Easter egg (added 27.12.12):
During the game demo sequence, when DSI logo and credits are displaying, hold Up and wait about 10 seconds, then while still holding Up press A, B, Start, Select, Select, Start, B, A. A screen with the DSI developer's photos will be displayed.

(UNI) Skip cutscene (added 22.02.14):
A "Drivers, start your engines!" cutscene may be skipped by pressing Up + A + B at the same time.

Binary Land

(GEN) Hi-score record:
If your score is higher than 30000 pts, press Select after you die - you will be able to enter your name on the list of the best scores.

(FIX) Continue:
After the game over screen, hold at the title screen A or B or both at the same time and press Start.

(GEN) Love story:
Hold on both first and controller 2s A + B at the same time then press Reset to switch game to "Love story" mode. Title screen changed to "KIKU. MEGU. LOVE STORY" and when one of penguins will be hit by enemy it will be crying name of another penguin. "KIKU" is a programmer of HUDSON Kikuta Masaaki (菊田昌昭. He put secret codes with messages almost in all his games under HUDSON label.

Bing Kuang Ji Dan Zi - Flighty Chicken

(BUR) GameGenie (added 23.02.14):
XTETAAAV-Displays the game variables and timers during the game play.

Bio Hazard

(UNI) Earter egg (added 08.07.13):
During the game, press Up, Up, Down, Down, Left, Left, Right, Right, A. A message with the full company name ("Computer Technology Co., Ltd. Fuzhou Waixing") will appear.

Bio Miracle Bokutte Upa

(GEN) Level select:
At the title screen, hold Up + A on controller 1 and Down + B on controller 2 at the same time. Now press Select on controller 1, then release all buttons.

(BUR) No Damage:
RAM variable $1C set to 1 instead 0, then message "NO DAMAGE" appears at the stage number screen. No other noticeable differences.

Bionic Commando, Hitler no Fukkatsu - Top Secret

(GEN) Level exit:
During regular "left-to-right" levels, hold A + B then press Start. This won't work for the "bottom-to-top" levels.

(UNI) All weapons (added 11.02.16):
In the Japanese version, go to the interrogation room in level 17 and beat the prisoner 255 times, so he gives to you all weapons from the game.
Source: tcrf.net

Black Bass 2, The, Black Bass USA, The

All versions:

(BUR) Hidden text (added 23.11.08):
There is a hidden copyright text in ROM:
1988. Another Ltd. to YOSHIKAWA
1988. Another Ltd. Ver.


US version:

(GEN) Secret words (added 16.01.14):
HBMAX-Attractive Bait Meter

Japanese version:

(UNI) Secret words (added 23.02.14):
MIRUN-Attractive Bait Meter

Black Bass, The

(BUR) Hidden text (added 23.11.08):
The RESET routine in this game uses string
NAOKI
to check if game was soft or hard reset.

(BUR) Hidden text (added 23.11.08):
There is a hidden copyright text in ROM:
1986ANOTHERltd.


Blaster Master, Chou-Wakusei Senki - MetaFight

US version:

(BUR) GameGenie (added 04.12.08):
XTVYGGAV-There were Stage select mode at the development stage. The Japanese version contain it full functional, but the US version have critical JSR opcode removed, so it is impossible hack it back only with some bytes. This cheat just allow to view Stage select mode, but didn't allow to play at all.
GAUGIKGK-Enable debug features. While in game, level edit mode (Up on controller 2) not working. Use A and B on controller 2 to increase weapon power and stuff.

Japanese version:

(BUR) GameGenie (added 04.12.08):
EKNYUYAA-Enable debug features. You can select any level after starting a new game. While in game, press Up on controller 2 to move to any level coordinates, there was level editor or something else as well at the development stage with extra RAM at $7000-$7FFF area. Use A and B on controller 2 to increase weapon power and stuff.

Prototype version:

(BUR) GameGenie (added 04.12.08):
GAXKPKGK-Enable debug features. While in game, level edit mode (Up on controller 2) not working. Use A and B on controller 2 to increase weapon power and stuff.

Blodia Land - Puzzle Quest

(UNI) Stage and level skip (added 10.07.13):
Hold A + B on controller 1 and controller 2 at the same time then press Reset. Press B while in map mode to change the stage. Press Up or Down while on level to change the current level. Press A to play selected level.

Blue Marlin, The

(GEN) Sound test:
Hold Select + Start then press Reset.

(BUR) Hidden text (added 05.10.08):
The RESET routine in this game uses string
MEGUMI.MY.LOVE
to check if game was soft or hard reset.

Blue Shadow, Kage, Shadow of the Ninja

(FIX) Cheat mode:
Press A, A, A, A, B, B, B, B, A, B, A, B, A, B, A, B after selecting the number of players at the title screen. A sound will confirm correct code entry. Hold one of the following button combinations, then press Start on controller 1. To start with invulnerability, hold Down on controller 2 in addition to the other buttons.
B on controller 2-Level 1-2
A on controller 2-Level 1-3
A + B on controller 2-Level 1-4
B on controller 1-Level 2-1
B on controller 1, B on controller 2-Level 2-2
B on controller 1, A on controller 2-Level 2-3
B on controller 1, A + B on controller 2-Level 3-1
A on controller 1-Level 3-2
A on controller 1, B on controller 2-Level 3-3
A on controller 1, A on controller 2-Level 4-1
A on controller 1, A + B on controller 2-Level 4-2
A + B on controller 1-Level 4-3
A + B on controller 1, B on controller 2-Level 5-1
A + B on controller 1, A on controller 2-Level 5-2
A + B on controllers 1 and 2-Sound test

Blues Brothers, The

(UNI) Level skip (added 05.10.07):
Any time in the game press on controller 2 Down + Left + A + B + Select + Start and the same time press Up + Right + A + B + Select + Start on controller 1. This will enable level skip feature. To skip level press A + B + Select + Start on any controllers, input from both controllers merges into one button combination.

Bo Jackson Baseball

(GEN) All-Bo Jackson team:
Select any team, select a CPU opponent and press A, then press Left + B + Select at the team roster screen. Bo Jackson will appear in every position on the roster.

(GEN) Get Bo Jackson:
Select Chicago as a team, select a CPU opponent and press A, then press Up + Select at the team roster screen to place Bo Jackson as your central fielder.

Bokosuka Wars

(UNI) Higher level (added 23.02.14):
Hold Select + Start then press Reset. Immediately after reset, start shouting to the microphone until the title music starts. If done right, you can start a new game with some altered parameters of your character (K320), so you can fight without loose.

Bomber King, Robo Warrior

All versions:

(FIX) Cheat mode (added 08.01.14):
To enable a cheat mode you must meet a couple of requirements. First one is to play the game at least a couple of minutes, to be more specific: at least for one background music loop, the cheat won't trigger before that. The second one is the last killed enemy should be Lurker (grey enemy that fires powerful missiles), doesn't matter when or how you kill it, just don't kill anyone after that, or you need to find another Lurker. The third reuirement is the power meter and the energy tanks should be full. As soon as power meter drained very quickly, the best time to do a trick is right after using the Energy Tank item, so keep it until now and equip before you going to enable this cheat. Fourth reuirement is to have exactly 62 bombs, it's easy. And finally fifth requirement is to face the player to south. So, now to do a trick you must collect 62 bombs, kill Lurker, equip the Energy Tank, turn your face South, use the Energy Tank then immediately press Up + Left on controller 2. That's it, the cheat enabled. No Megaton Bombs or Inventory involved. Some effects are immediate and permanent: any items are available now and infinite, bombs are infinite too. Press Select to enter the Items menu, hold B on controller 1 then hold Select, while holding B + Select you can move the obstacles, release to return to normal mode. And finally, press Up + Left + Select on controller 1 to enter the stage select mode. Press A or B to change a level, then press Start.

US version:

(BUR) Theme song (added 05.10.07):
Set $2F8 to 1, a new title menu option that plays theme song along with the lyrics will appear. This option is unlockable in the Japanese version and can be enabled once you reach Items Shop after either 1, 3, 6, 9, 12, 16 or 21 level.

Bomberman

(BUR) Debug leftovers (added 04.08.15):
Setting RAM address $94 to a non-zero value before entering a level will cause the game to render hidden tiles (doors and powerups) as red half-destroyed walls until they are revealed.
Source: BMF54123

Bomberman II, Dynablaster

(UNI) Password generator:
Level:-
Bombs:
Blast range:
Random:
Password JP:
Password US:


(BUR) Hidden text (added 19.01.09):
The RESET routine in this game uses string
KOSAKA!!
to check if game was soft or hard reset.

(FIX) Secret passwords:
US|Japan-Effect
K3456712|PCDEFGAB-Sound test
K138BHDJ|PACHINKO-Manual detonator
K1HB3G1H|PANICMAN-Semi manual detonator
KJH5C13D|PONEJACK-Bonus stage
K2JG2135|PBOMBACE-Small primer time
K2JG2G1H|PBOMBMAN-Normal primer time
K2JG2JF4|PBOMBOLD-Long primer time

Bonk's Adventure, FC Genjin - Freakthoropus Computerus

(GEN) Level select and Sound test:
Hold Down + Left + A + B + Select + Start at the title screen. Switch between Level select and Sound test by pressing Select.

Booby Kids

(BUR) Password option (added 15.05.08):
There is some text left from early development stage. "ENTER PASSWORD" should be written on other nametable and probably switchable with the title screen.
0000EB50: 4C 54 44 2E FF 4E 20 43 4F 2C 4C 54 44 2E FE 28 LTD..N CO,LTD..(
0000EB60: 8A 45 4E 54 45 52 20 50 41 53 53 57 4F 52 44 FF .ENTER PASSWORD.
0000EB70: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 ................


(BUR) Hidden text (added 08.12.08):
The RESET routine in this game uses string
ERIKO
to check if game was soft or hard reset.

Boogerman

(UNI) Debug feature (added 25.01.10):
Pause the game then press A + B to enable cheat mode, then press Up, Left, Down, Right, A, A, B, character will disappear and you will be able to scroll any place of level. To put character back, press Start.
Source: Yakovlev Victor

Boy and His Blob, A - Trouble on Blobolonia, Fushigi na Blobby - Blobania no Kiki

(BUR) GameGenie:
XAKKEZXY+UGKKOXXK-A simple coordinate display. The first set of values is for the boy, and the second set is for the Blob. Each value represents the character's current screen number, X position, and Y position, respectively.
Source: BMF54123

Bram Stoker's Dracula

(BUR) GameGenie:
TOXEYNGT-Enable the title screen cheat for activating the advanced menu features.
After applying GG press Select, Up, Start, Right, Left at the title screen, before "Push Start" message appears. A sound will confirm correct code entry. This is enables following features:
Invulnerability:
Select "controls" menu item, hold A + B and press Start, you will hear the sound, it is mean, you'll be full invulnerable.
Level select:
Select "sound" menu item, select sound index from 0 to 13, then hold A + B and press Start, you will hear confirmation sound. Then just select "start game" option to play from selected level.

Break Time - The National Pool Tour

(UNI) Disable AI thinking (added 11.07.13):
This cheat only available in the "NINE BALL", "ROTATION" and "NATIONAL POOL TOUR" game modes. During the game, before the opponent starts thinking, hold Up + Select on controller 1 and Down + Left + A on controller 2 at the same time.

(UNI) Instant win (added 24.02.14):
Select the "NATIONAL POOL TOUR" game mode. Before the game starts, at the US map screen hold A + B + Select. The password screen will load instead of the game, mean you automatically beat this tour. Hold these buttons all the time until the ending sequence.

(UNI) Secret passwords (added 11.07.13):
SJNG-Sound test
FNDG-Ending
VRHK-Speech test

(UNI) Password generator (added 11.07.13):
Name:
Match:
Password:


Bucky O'Hare

All versions:

(GEN) Secret passwords:
HARD!-Hard mode

(BUR) Sound check:
Also, all versions of this game contains "SOUND CHECK" string as one of game strings, but seems there is no any handlig code for this string nor for sound check mode.

(UNI) Password generator (added 02.01.08):
Power:
Blue planet:
Red planet:
Green planet, Base HI:
Yellow planet, Base LO:
Password:


Japanese version:

(BUR) Copyrights check:
As most games by Konami made after 1991 year, this game contains some simple copy protection, it checks integrity of the title screen tilemap around the "KONAMI 1991" copyrights, and additionally tests for the opcodes integrity of the test routine itself. If tests fails, then the game enables a "HARD!" mode with one-touch-death permanently without using a secret password. This code were removed from the US version.

Buggy Popper, Bump'n'Jump

(FIX) Continue (added 25.02.14):
At the game over screen, hold Select on controller 1 and press A and B in any order on controller 2. Release all buttons and start a new game, you'll start from the last played scene, instead of the first one.

Bugs Bunny Birthday Bash, Bugs Bunny Birthday Blowout, The, Happy Birthday Bugs

(BUR) Sound test:
The strings sitting in the second bonus game strings table, seems it was possible to switch to that mode from this bonus game. But no accessing to this string procedures has been found. The cheat seems to be completely disabled.
000133C0: FE C0 C5 C3 B8 FE B2 C5 C4 C4 BF BE FE 8A 8A 0A .PUSH.BUTTON....
000133D0: 07 0C FE C3 BF C5 BE B4 FE BD BF B4 B5 FE BE BF ...SOUND.MODE.NO
000133E0: B0 0A 0C FE FE FE C4 B9 BD B5 FE B9 C3 FE C5 C0 @.....TIME.IS.UP


Bugs Bunny Crazy Castle, The, Bugs Bunny Fun House

(UNI) Password generator (added 30.10.07):
Level:
Password:
Note: levels 61, 62, 63, 64 are Special.


Burai Fighter

(GEN) Secret passwords:
LOBB-All weapons
KAGA-99 lives

(BUR) Hidden text (added 19.01.09):
There is some hidden text inside the ROM:
TAKASINA INOUE
Probably it was a part of some program code since strings are zero-terminated, but game itself do nothing with them and there is no visible cross-refrences. There is no such strings in the US version of the game.

Buzz and Waldog (USA), Ko Ko Eo Deu Ben Ce (Korea)

(UNI) Rest screen (added 24.12.15):
Every 50 minutes of the game play, no matter if you die or got the game over screen, the game will show the special screen with "REST" message on it. So it looks like this game wanted you not to play too much and rest. If you be patient and wait 5 minutes at this screen, you'll obtain one extra life and the counter will be reset and stopped. Press Start to exit back to the game and timer will restart again, so you can repeat the process and obtain up to 99 lives.

Cadillac

(UNI) Pre-defined card stack (added 15.07.13):
Enter the "Game Level Set" menu option, on controller 2 hold B, then press Up, Right, Right. The screen color will change from green to pink. Now start a new game, at the card shuffling screen, quickly press A on controller 2 before the cards start shuffling.

California Games

(UNI) Easter egg (added 26.02.14):
For any player, enter name as "PAUL" or "RACHEL". During "SKATE" competition, when this player is active, just before the end of the route, the flashing writing "PP & RME" will appeat on the ground. Initials stands for Paup Proctor and Rachel M. Edwards.

(BUR) Hidden text (added 26.02.14):
The RESET routine in the US version of this game uses string
PAUL & RACHEL
while the European version uses
HAS BEEN RAN
to determine was game hard or soft reset. As well as the whole file filled with a short copyright string for the US version
(C) COPYRIGHT 1987 RARE LTD. ENGLAND.
and for the European version
(C) COPYRIGHT 1990 RARE LTD.


Capcom Barcelona '92, Gold Medal Challenge '92

(BUR) Hidden text (added 11.07.09):
This game uses string
make software
to check save SRAM consistency and reset if it is not initialized.

Captain America and The Avengers

European version:

(BUR) Hidden text (added 15.01.09):
There is some hidden copyright text inside the European version ROM:
Program By
Hisatada,Ohta. &
Shuji,Ishimaki.
 Wed Aug 28,1991


Captain Ed

(UNI) Invulnerability (added 27.06.08):
During BOSS fight in no-flight game mode, pause the game then press on controller 1 Up + A + B + Select. After the game is unpaused you will be invulnerable.

(FIX) Flight stage skip (added 20.12.13):
During the flight stages, press Select to enter the items screen, then hold Up + A + B and press Select. If done right, you'll warp to the boss of the current level.

(UNI) Secret passwords (added 27.06.08):
こひあ-Invulnerability for all game modes.

(UNI) Secret words (added 27.06.08):
Enter as player name:
きんた-The BOSS rush mode.

Captain Planet and The Planeteers

(GEN) Secret passwords:
506210-Ending sequence, unlockable after beating the game.

Captain Saver, Power Blade 2

(UNI) Sound mode:
At the title screen, hold Left + A + B on controller 2, then press Start on controller 1.

(BUR) Hidden text (added 19.01.09):
There is a hidden message inside the game ROMs:
TOSHIKAZU IWASA


Captain Skyhawk

(GEN) Invulnerability:
Press Up, Right, Down, Left, Up at the copyright screen, background will flash.

(FIX) Nine lives, all weapons:
At the title screen, press Start and wait until the second title screen appears. Hold Down + A and wait for the next screen.

(FIX) Level skip:
Press Up + B on controller 2 during the game.

(UNI) Star speed (added 28.02.14):
During docking sequence after the dog-fight levels, press A or B on controller 2 to accordingly decrease or increase speed of the background stars. Normally the game automatically set this speed at maximum only on the final boss fight.

Captain Tsubasa, Tecmo Cup - Soccer Game, Tecmo Cup - Football Game

(UNI) Password generator:
Bits:










Japan:
USA:
Note: "#" means "Jr."


Captain Tsubasa Vol. II - Super Striker

(FIX) Sound test:
At the title screen, hold A + B then press Start.

(BUR) GameGenie (added 28.07.13):
OZOAYPXX+OZOETPEX-Re-enables the stage select mode, after an initial game briefing.

(UNI) Password generator (added 27.09.08):
Bits:









Random:
Password:


Castelian, Kyoro Chan Land

(UNI) Secret message (added 28.02.14):
At the game over screen, hold Up + A + Select, wait until the title screen is displaing, instead you'll see a secret message: "COPYRIGHT TRIFFIX 1991".

(BUR) GameGenie (added 26.06.08):
SAOKUPSZ (for the US version)
SAXKUZSZ (for the Japanese version)
-Enables Invulnerability cheat. Press Down + Left + A + B any time in game to become invulnerable. After entering new level you need to use cheat again.
SAOKSPSZ (for the US version)
SAXKSZSZ (for the Japanese version)
-Use this code to enable level skip feature by pressing the same buttons as for previous cheat. If you use this GG code alone, this will cause death instead of level skip.

Castle Excellent, Castlequest

(GEN) Sub command:
During the game press A or B on controller 2.

Castle Quest

(UNI) Secret words (added 01.03.14):
Enter one of these words as a player name in any game mode.
たろっと-Tarot - Tarot cards viewer
でも-Demo - Demo sequence viewer
くみんしーど-Kumin Seed - Ending sequence
もりきゅう-Wood 9 - Special round
よこがお-Profile - Character viewer
さしえ-Illustration - Picture viewer
とらんぷ-Playing cards - Playing cards viewer
もにたー-Monitor - Debug monitor
おおくほななこ-Ookubo Nanako - Easter representing the Ookubo's newborn daughter with some speech
なかしままさと-Nakasima Masato - Easter with small one-eyed girl, walking through the screen and shouting "MA!"

(BUR) Hidden text (added 05.11.08):
There is some hidden copyright text in ROM file:
COPYRIGHT 1990 OPR RYOUICHI OHKUBO


Castle of Deceit

(UNI) Level skip and invulnerability (added 15.07.13):
Any time during the game, except the title screen, hold Up on controller 2 and Up + A on controller 1 at the same time then press B on controller 1 to enable the level skip and invulnerability cheat. Now hold B and press Select on controller 1 to skip current level, hold A and press Select to enable invulnerability.

(UNI) Unlimited continues (added 15.07.13):
After the game over screen, hold A then press Start to continue from the last level you've played. It works only three times. Hold additionally Down on any controller before pressing A + Start every time you get a the game over screen and your continue will be unlimited.

Castle of Dragon, Dragon Unit

(UNI) Easter egg (added 01.03.14):
While walking through the corridor to the princess after beating the last boss of the game (the Red Dragon), hold Up + Left + A + B + Select + Start on controller 1. The princess, surprisingly, meets you topless. You can't see the topless princess in the Sprite Viewer of the Test Menu, though.

(UNI) Test mode (added 29.12.08):
At the title screen, press A, A, Left, Left, A, A, Left, Left, A, A, Left, Left, A, A, Left, Left, A, A, Left, Left, A, A, Left, Left, A, A, Left, Left, A, A, Left, Left. Test menu will appear. You will be able to select some game options, listen to music, view sprites and backgrounds. You can enter the game in test mode but cannot complete any level. To return back to the normal game, select "EXIT" option.

(BUR) Hidden text (added 29.12.08):
The RESET routine in this game uses string
GIANTS
to check if game was soft or hard reset.

Castlevania II - Simon's Quest

(UNI) Password generator:
Exp. level:Days:
Whip:
Silk Bag:Cross:
Crystal:
Items:
Rib
Heart
Eye
Nail
Ring
Weapons:
Dagger
Silver Dagger
Gold Dagger
Holy Water
Diamond
Flame
Oakstake
Laurel:Garlic:
Random:
Password (NTSC):
Password (PAL):


Caveman Ninja, Joe & Mac

US version:

(UNI) Secret words (added 17.07.09):
Enter one of following words as player name for the hi-score table:
BUNNYEAST-Player name will change to "EXCELLENT", from now in game you will have infinite lives and can skip current level by pressing Select on controller 1.
DATABUNNY-Player name will change to "YO DUDES", from now in game you will have infinite lives. If you appears to enter hi-score table name again, any your name will be always "YO DUDES" after using this cheat.

European version:

(UNI) Secret words (added 17.07.09):
Enter as player name for the hi-score table:
NESRABBIT-Player name will change to "B BUNNY", from now in game you will have infinite lives. If you appears to enter hi-score table name again, any your name will be always "B BUNNY" after using that cheat.

Challenge of the Dragon (Color Dreams)

(UNI) Level skip (added 02.02.14):
Any time during the game, hold Up on controller 2 and Up + A on controller 1 at the same time then press B on controller 1 to enable the level skip cheat. Now hold B and press Select on controller 1 to skip current level.

Challenger

(GEN) Love story:
When in SCENE 2 press on controller 1 A, B, A, A, B, B, A, A, A, B, A, A, B, B, B, B, A, B, A, B, A, B, B, A, A, B, A, A, A, B, A, B. You will see the message "KIKU MEGU LOVE STORY!" immediately. Note: if you write code sequence as 0 and 1 string "0100 1100 0100 1111 0101 0110 0100 0101" it will give you "4C 4F 56 45" hex string, in ASCII this mean "LOVE". Another interesting thing, that is the same message appears in "Binary Land" game for Famicom by HUDSON. "KIKU" is a programmer of HUDSON Kikuta Masaaki (菊田昌昭). He put secret codes with messages almost in all his games under HUDSON label.

(BUR) Hidden text (added 09.12.08):
The RESET routine in this game uses string
KIKU
to check if game was soft or hard reset.

Championship Bowling

(BUR) Hidden text (added 23.11.08):
There is a hidden copyright text in ROM:
1989ANOTHERltd.
1989 Another Ltd.
Another Ltd. 1989/2/27 New バージョン


Championship Pool

(BUR) GameGenie:
VYUTKKXG+EZUVEGXZ-Access to unfinished or disabled "cheat" console.

Chaos World

(BUR) GameGenie:
ZAKPOLGA-Code enables in-game debug screen instead the quick info screen popping up when the player is standing up.

Chess Academys

(UNI) Cheat mode (added 07.04.10):
At the title menu press A, A, Up, Down, Left, Right, Select, B, B, A, A. Sound will confirm correct code entry. From now all tiles of your opponents will be open and some other game features cheated to win easy.

Chessmaster, The

(BUR) Hidden text (added 19.01.09):
There is hidden version text inside ROM:
The ChessmasterVersion 1.3


Chester Field - Ankoku Shin heno Chousen

Final version:

(GEN) Invincibility:
During the game press Select to enter the game menu, press A + B on controller 2 to enable cheat input, now press P, A, Right, Left, Up, Right, Left, Down, Up, Right, Down.

(GEN) Suicide:
During the game, press Down + A + B on controller 2.

Beta version:

(UNI) Debug mode (added 20.12.13):
Any time during the game, press A + B on controller 2 to enable the debug mode. The game will hang and waiting for the commands, which changes some parameters in game.
Press Up or Down on controller 2 to enable or disable invincibility.
Press Up on controller 1 to enable the Mornig Star weapon.
Press Select on controller 1 to enable the Stage Select mode. A small number appears at the center of the screen. Press Left or Right on controller 1 to change it. Press Start to start with desired level.
Press A + B to continue the normal game with changed parameters.

(BUR) Hidden text (added 17.01.09):
There is a hidden copyright text in the Beta version ROM:
CHESTER FIELD SOUND DATA Ver 1.02 MUSIC COMPOSED & S.E. CREATED BY M.SAITOH(T.S.T) COPYRIGHT (C) 1987 VIC TOHKAI/TECMO.LTD
There is no such string in final release.

Chiki Chiki Machine Mou Race, Wacky Races

All versions:

(FIX) Only Bosses:
At the title screen, after the "PUSH START BUTTON" message appears, press A, B, Right, Left, Right, Left, Down, Down, Up. This cheat also enables debug mode. To use it, pause the game, hold Select and press Right to select weapon, or press Up to restore hearts. Or hold A + B then unpause the game to skip to the next boss.

US version:

(UNI) Double Jump (added 17.03.11):
Press Up, A, B, Right, Down, Left while in pause. From now you can perform double jump by pressing jump button twice.

Chiller

HES version:

(BUR) Hidden text (added 17.01.09):
There was some additional strings at the title screen before final release, but seems was removed from code. Only strings left:
BY CHRISTOPHER ERHARDT


AGCI version:

(UNI) CRC test (added 06.10.08):
Hold Up + A + Select, then press Reset. Messages "NTSC PAL VERSION 21 SEPT 1990, NTSC MODE, PRG CHECKSUM 1681, MODS BY SCOTT SCHRYVER" will appear.

Chinese Odyssey, A, Da Hua Xi You

(UNI) Easter egg (added 16.07.13):
During the game, enter the menu by pressing Select then press Left + Select + Start on controller 1. A "MARS" logo will appear at the top-left corner of the screen.

Chip's Challenge (Prototype)

(UNI) Secret passwords (added 07.04.08):
cred-Credits screen
hard-Extra 13 Levels (no pass for them)
ybli-Ending screen
jhen-Extra Level 133 "CAKE WALK"
coza-Extra Level 134 "FORCE FIELD"
rgsk-Extra Level 135 "MIND BLOCK"
digw-Extra Level 136 "SPECIAL"

Chitei Senkuu Vazorudaa, Wurm

(UNI) Sound test:
At the title screen, hold Up + A + B on controller 2.

(UNI) Stage select and invulnerability:
At the title screen, hold Up + A + B on controller 1 and Down + A + B simultaneously on controller 2. Release buttons and by pressing B change level and press Select to switch to "TEST" mode for invulnerability.

(BUR) Hidden text (added 19.01.09):
There is disabled option in final release "VISUAL DEMO". Only text left. There is no any code in ROM.

Chou Hen, Galactic Crusader, Papillion

All versions:

(UNI) Level and weapon select:
At the title screen, press Down, B, Left, A, Up, A, B, Right, then press one of the following buttons:
Up-Level 2
Down-Level 3
Left-Level 4
Right-Level 5
Select, Right-Wave
Select, Left-Spiral
Select, Down-Trident

Kinema Music version:

(UNI) Slideshow:
At the title screen, press Down, B, Left, A, Up, A, B, Right, Select, A, B.

Choujin Sentai - Jetman

(GEN) Extra difficulty settings:
Hold A + B then press Start at the opening screen to unlock the hard and very hard difficulty modes. This is unlockable cheat, you can obtain it if beat the game once.

(GEN) Soft reset:
During the game press A + B + Select + Start once.
Source: ReyVGM

Chu Da D

(UNI) Easter egg:
Press Up, Down, A, B, Left, Right, B, A at the title screen. The title will change to the company emblem.

Chu Han Zheng Ba - The War Between Chu & Han

(BUR) GameGenie (added 03.03.14):
XVNTAIAV-Displays the game variables and timers during the game play.

Chubby Cherub, Obake no Q Tarou - Wanwan Panic

Japanese version:

(UNI) Infinite lives (added 03.03.14):
To enable this cheat you must plug in the 4-Player adapter for Famicom (4-Score adapter for the NES isn't compatible), then at the title screen press Up + Down + Left + Right + A on controller 1. Start a new game, if done right, the Q-Tarou character picture on the stage info screen will change from standing to walking.

Chuugoku Janshi Story - Tonpuu

(UNI) Version display (added 03.03.14):
At the title screen, press Left, Left, Left, Left, Left, Left, B. The current known dump version is 1.05.

(GEN) Music test:
At the title screen, press Left, Left, Left, Right, Right, Right, Start.
Source: ReyVGM

(UNI) Voice test (added 03.03.14):
At the title screen, press Left, Left, Left, Right, Right, Right, Right, Right, Right, Right, Right, Start.

(FIX) Stage select:
At the title screen, press Down or Select 8 times, then press Start.
Source: ReyVGM

(FIX) Continue:
After the game over screen, at the title screen, press B + Start to begin where you left off.
Source: ReyVGM

(FIX) Tile select:
While playing the game, instead of pressing A to reveal the Mahjong title, press Up 5 times then Down. Press Up or Down to select any tile you want.
Source: ReyVGM

Chuugoku Senseijutsu

(GEN) Auto fill names list:
While on the Name List menu, hold Left and press B on the number 1 and number 6 to automatically fill the names list.
Source: ReyVGM

(UNI) Sound test (added 17.01.09):
At the title screen, press Select 5 times then hold Up and press B. A "SOUND REQEST" screen will appear.

(UNI) Hidden gambling game (added 04.03.14):
During the game, when at the Slot Machine Oracle, run the machine, when all the rows are stopped, hold Up and press A a couple of time to skip the messages. After the last message is skipped, the Slot Machine Oracle will turn to the Gambling Machine. You'll have some credits and can place the bets and win some money. Hold Up and press B to return to the main game with money won.

Chuuka Taisen

(UNI) Cheat menu (added 11.06.12):
At the title screen, hold Up + Left + B on controller 1, then press Start. A sound will confirm correct code entry. Now release previously pressed buttons and enter button code Select, B, Left. A cheat menu will appear. You can select difficult level, number of player lives and toggle power selection mode. When power selection is "ON", during the game press Start to pause, then cycle through 6 power levels by pressing B on controller 1.

(UNI) Auto fire (added 04.03.14):
Start a new game, at the "READY!" screen press Down + B once. A sound will confirm correct code entry. Now you can hold A or B to fire automaticly. This cheat will be disabled after the game over screen.

Circus Caper

(BUR) GameGenie (added 16.07.12):
AANNNNNY-Enables some simple debug functionality. During the game press Start to skip to the next stage. Press A before starting a new game to enable invincibility. Press B before starting a new game to jump to the ending screen.

City Adventure Touch - Mystery of Triangle

(UNI) Sound test:
Hold A + B on both controllers at the same time then press Reset.

Clash at Demonhead, Dengeki - Big Bang!

All versions:

(UNI) Instant death (added 14.02.13):
During the game, press Select to enter to the item select screen, press A + B at controller 2.

Japanese version:

(UNI) Secret passwords (added 07.04.08):
TENSAIWAWASURETA
KOTOWOOMOIDASUYO
-Full HP/MP and equipment.

US version:

(UNI) Secret passwords:
TENSAIWAWASURETA
KOTOWOOMOIDASU
-Full HP/MP and equipment.

Cliffhanger

(BUR) Hidden text (added 16.07.13):
There is a hidden copyright message inside ROM:
COPYRIGHT SPIDERSOFT 1993


Clu Clu Land

(BUR) Hidden text (added 26.11.08):
There is a hidden copyright message inside ROM:
T.SAWANO


Columbus - Ougon no Yoake

(UNI) Skip fight (added 18.07.13):
Select the "Load Game" option from the main menu, hold Up + B on controller 2 and B + Select on controller 1 at the same time, then press A on controller 1 to enter the selected option. Do not load any games, press B to return back to the title screen and start a new game. From now, you can finish any battle just by pressing Start on controller 1. This cheat will be saved also to your save slot and you won't need to enter it again, just load a previously saved game.

Commando, Senjou no Ookami

All versions:

(FIX) Secret passages (added 06.10.08):
At the title screen, press Left, Left, Left, B, B, A, A, A, A on controller 2 then start a new game. From now you will see underground passages on level.

(FIX) Level select (added 06.10.08):
At the title screen, press Left, Right, A, B, A, Down, Up on controller 2 then hold A on controller 1 and by pressing Select selects the desired level.

(UNI) Secret message (added 07.10.08):
Finish the last level 4-4 with exactly 3 lives and 24 grenades and you will see secret message "ARIGATOU GOZAIMASHITA, 31ST JULY 1986 CAPCOM" .

(BUR) Hidden text (added 07.10.08):
There is a hidden text in the ROM file:
SOFT:M.K SCROOL:KURA PLANNER:KURO SOUND:SAKA MUSIC:TAMA


US version:

(BUR) GameGenie (added 06.10.08):
PEKGKSYA-Enables "Timer Adjust" cheat. At the title screen, press A, Left, Left, Left, Up, B, Up, A, Right, Right, Right on controller 2. During the game press A + B on controller 2 to speed up the game timers.
AEUGXSNA-Enables "Invulnerability" cheat. After the game over screen and, when return to the title screen, press Down, A, A, Right, B, B, Up, Up, A, Left, Left, B, Down on controller 2, then select "1P CONT" or "2P CONT" menu options, hold A + B on controller 1 and press Start.

(BUR) Disabled cheats:
There is a lot more cheats was in game at the development stage and previously in the Japanese version. Cheat B, Down, Up, A, Left, Left, Right at the title screen is checked and triggered but there is no code that uses it's cheat flag in the whole ROM, it was the Frame Advance cheat in the Japanese version. Another cheat Left, B, B, Right, A, Up disabled by setting some wrong data in code sequence, so it cannot be verified correctly, but there is no any code that uses according cheat flag too. Two more disabled but still working cheats mentioned in "GameGenie" section. Another cheat sequence present in the ROM but not checked by any part of the code is Left, Left, Up, B, Up, A, Right, Right, Right.

(BUR) Hidden text (added 07.10.08):
There is a hidden text in the ROM file:
NO.16 TAKAI MAMIKO KAISYA NO HIKKOSHI DE 86/7/6 AKUSYUKAI NI IKENAKKATTA NOGA KUYASII MAMIKO FAN YORI
which means "It was not possible to go to the handshake party of Mamico done to 1986/7/6. For the move of my company. From Mamiko fan". Takai Mamiko is a singer in Japan. It is an old star. "Handshake party" is a party from which it shakes hands with the celebrity. And one more
THIS GAME OF KEYWORD IS 3/24... ITS MY BIRTHDAY.
IF 4-4 ROUND PLAY 3=PLAYER 24=HAND BOMB THEN YOU WILL BE CLEAR THIS GAME.
MY NEXT MAKE GAME IS -CAPTAIN HIGEMARU- PLEASE PLAY IT. YOU KNOW ??
86/9/10FOR USA VERSION

Source: Pongbashi

Japanese version:

(UNI) Frame advance (added 07.10.08):
At the title screen, press B, Down, Up, A, Left, Left, Right on controller 2. In game press or hold Select to stop or move frame by frame enemies. In the US version this cheat was disabled.

(BUR) GameGenie (added 06.10.08):
PAEKXSYA-Enables "Timer Adjust" cheat. At the title screen, press A, Left, Left, Left, Up, B, Up, A, Right, Right, Right on controller 2. During the game press A + B on controller 2 to speed up the game timers.
AENKEKNA-Enables "Invulnerability" cheat. After the game over screen, when return to the title screen, press Down, A, A, Right, B, B, Up, Up, A, Left, Left, B, Down on controller 2, then select "1P CONT" or "2P CONT" menu options, hold A + B on controller 1 and press Start.

(BUR) Hidden text (added 07.10.08):
There is a hidden text in the ROM file:
86/8/6 FOR JPN VERSION


Conflict

(BUR) GameGenie (added 18.07.13):
AENSSYPA-"Sorry Version for Promotion..." message if you select levels from 8 to 16 to play.

Conquest of the Crystal Palace, Matendouji

All versions:

(GEN) Sound test:
At the title screen, hold A + B + Select for a while. Use the D-Pad to select a song and press A to play the current selection.

(GEN) Cheat mode:
At the title screen, hold B + Select for a while, release the buttons then press A + Select a couple of times (not holding it), until a sound will confirm correct code entry. Actually, you just need to press both combination once, but program skip the code test every 8 frames, so you can just miss if press exactly at that time. Begin game play, hold Select and enter one of the following codes to activate the corresponding cheat function.
Right-Temporary invulnerability
Left-Extra gold
Up-Jumping Shoes
Down-Full life
Up + Right-Extra lives (up to 99)
Down + Left-Power-up weapon
Up + Left-Moon Mirror
Down + Right-Zap energy

Japanese version:

(GEN) Extra credits:
At the title screen, hold B + Select for a while, then press A + B to increase starting credits number.
Source: ReyVGM

Contra, Probotector, Contra 1993, Super Contra II

All versions:

(GEN) Extra 30 lives:
At the title screen, before demonstration begins, press Up, Up, Down, Down, Left, Right, Left, Right, B, A. The buttons Start and Select not counting when entering cheat, so you can press it any time, but after pressing Start game begins and entered button sequence is checked.

Japanese version:

(GEN) Sound test:
At the title screen, hold A + B and press Start.

(UNI) Stage select:
At the title screen, press Start, then hold Up + Left + A + Select before the title screen disappear.

(GEN) Secret message (added 05.03.14):
After beating the game, just before the staff roll, on the island explosion animation, hold Select + Start on controller 1 and keep holding it before the game should return back to the map and start a game from the beginning. Instead of map, you'll see a secret message about "Red Falcon".

Pirate version:

(UNI) Konami code (added 05.03.14):
At the title screen, press Up, Up, Down, Down, Left, Right, Left, Right, B, A. Instead of 5 starting lives, you'll obtain just 2.
Source: Yakovlev Victor

(UNI) Stage select (added 05.03.14):
At the title screen, press Select, Left, Right, B, A.
Source: Yakovlev Victor

(UNI) Extra 11 lives (added 05.03.14):
At the title screen, press Up, Down, B, A, then start a new game.
Source: Yakovlev Victor

(UNI) Extra 30 lives (added 05.03.14):
At the title screen, press Up, B, Up, A, Up, Up, B, A, then start a new game.
Source: Yakovlev Victor

Cool World

(UNI) Unlock `Ocean Plaza` level:
Press A, B, B, A, Left, Right, Left, Right at the title screen, triangle appears in left upper screen corner.

(BUR) Hidden text (added 13.11.08):
Most of the games programmed by Ocean shares the same music driver library all along with the hidden version and copyright string:
MUSIC DRIVER V1.0 (C)JONATHAN DUNN & OCEAN SOFTWARE


Corvette ZR-1 Challenge, Race America

All versions:

(UNI) Racers info skip (added 18.07.13):
At the racer's name entry screen, press B + Select to jump right to the race info screen, instead of watching the racer's presentation.

(UNI) Higher speed and accelerate (added 18.07.13):
At the initial copyright screen, press every single button at the same time on any controllers to make a combination of Up + Down + Left + Right + A + B + Select + Start in total. You can press the opposite D-Pad directions on the different pads. For example press Up + Right + A + B + Select + Start on controller 1 and Down + Left on controller 2. A sound will confirm correct code entry. Instead of 192 mph, you'll reach the 201 mph and the faster acceleration.

(UNI) Secret words (added 04.05.14):
Enter one of the following words as a Player 1 name in the single player mode to change the name of your opponent to the secret one, mentioning developer's name, his relatives and Jesus itself.
PROTECTOR-Player 2 name will be "ALEX DEMEO"
VICTORIOUS-Player 2 name will be "VICKY DEMEO"
IN GODS IMAGE-Player 2 name will be "TIFFANY DEMEO"
FOLLOW CHRIST-Player 2 name will be "CHRISTOPER D"
LITTLE LAMB-Player 2 name will be "RACHEL DEMEO"
GREATEST TRUTH-Player 2 name will be "JESUS IS LORD"

European version:

(UNI) Scene skip (added 07.03.14):
In the European version an ability were added to skip more info and animation screens, not really needed for the game. Just press A + B at the the title screen, next few screens, after a rave start, etc.

Cosmic Epsilon

(GEN) Continue:
At the game over screen, hold Select and press Start. Then, press Start at the title screen.

(GEN) Secret message:
At the title screen, press Up, Up, Down, Down, Left, Right, Left, Right, B, A. Message "I AM NOT KONANI" will appear. Similar code used in most of Konami games and accordingly called "Konami code" sometimes. If you try to enter is in "Cosmic Epsilon", then you will be informed about wrong game developer. ;)

(GEN) Level select:
At the title screen, press A, B, Right, Left, Right, Left, Down, Down, Up, Up after the introduction sequence ends and the logo appears. This is exactly "Konami code" backwards. ;)

(GEN) Another world mode:
At the title screen, press Up, Down, Left, Right, A, Down, Up, Left, Right, B after the introduction sequence ends and the logo appears. The phrase "Another World!" will appear at the bottom of the screen to confirm correct code entry. The game is more difficult in this mode. This chieat is unlockable when beating the game once, after the final staff roll, just wait for it at the Asmik logo.

(UNI) Invulnerability:
At the title screen, press Up, A, Right, B, Down, A, Left, B, Up, Select. A sound will confirm correct code entry.

(UNI) Copyright message:
At the title screen, press Select, Up, B, Left, A, Down, B, Right, A, Up after entering success Invulnerability code. Message "1989 home data" will appear.

(UNI) Easter egg (added 08.03.14):
After beating the game, before the Staff names is displaing, hold Select on controller 1. A small pictures, represents the staff members will appear at the top-left corner of the screen for every name.

(BUR) Secret message:
In addition to "I AM NOT KONANI" code game contain another text string "I AM NOT NANCO", which should be triggered by some key combination code like it Namco mostly likes.

Cosmic Wars

(UNI) Ending sequence (added 18.07.13):
At the title screen, hold Up + Right + A + B + Select then press Start on controller 1.

(UNI) Extra 20 of every unit (added 18.07.13):
At the game mode selection screen, hold Down + B + Select, then press Start on controller 1, then start a new game. You and your opponent will obtain 20 pieces of every unit for free from start.

(UNI) Skip Animation Between Turns (added 18.07.13):
During the game, hold Up + Right + A + B on controller 1 after the current round ends, but before the next one is started.

Cosmo Police Galivan

(BUR) Hidden text (added 19.07.13):
SRAM initialization routine in this game uses the string
HIROMU.YAMAMOTO
as valid data header.

(BUR) GameGenie (added 08.03.14):
GEOZUTVA-Re-enables the Pause cheat. During the game press A on controller 2.

Cosmos Cop

(UNI) Extra lives (added 08.03.14):
During the game, pause the game then press Up + B + Select to increase the lives counter.

(UNI) Extra weapon (added 08.03.14):
During the game, pause the game then press Down + A + Select to increase the weapon counter.

Crackout

(GEN) Secret words:
Enter into the computer at the end of the game:
MERRY CHRISTMAS-Ending of the game

Creatom

(UNI) Instant unlock (added 08.03.14):
During the "Unlock you universe" level, press Left + B + Select, then Right + A + Start and finally A + B + Start to instatnly complete the level.

(UNI) Instant game over (added 08.03.14):
During the game, press Up + A + Start to instantly over the current game.

(UNI) GL counter (added 08.03.14):
During the game, press Start to pause it, then press Left + B + Select, after that press Right + A + Select, then hold Up + Select and press A or B to increase or decrease the "GL" cointer.

(UNI) GameGenie (added 08.03.14):
XVUAOTAV-Re-enables the debug variables display, while increasing/decreasing the GL counter values.
XTEPKYAV-More debug display when unlocking.
GEXAZSGK+GESAASGK-More debug display during the "Unlocking" mode.

Crisis Force

(GEN) Extra 15 Ships:
At the title screen, press Up, Up, Down, Down, Left, Right, Left, Right, B, A, Start.

Cross Fire

(UNI) Level select (added 13.01.09):
At the title screen, press Select, Select, A, B, B, Select, B, Select, A then press Start.
Source: Yakovlev Victor

(UNI) Invulnerability (added 13.01.09):
At the title screen, press B, B, B, A, B, Select, Select, B, A, A, Select then press Start.
Source: Yakovlev Victor

(UNI) Invulnerability and Level select (added 13.01.09):
At the title screen, press Select, B, Select, B, A, B, B, A, B, B, Select, Select then press Start.
Source: Yakovlev Victor

Crystal Mines

(GEN) Level select:
At the stage number screen, press A or B to increase or decrease starting level number by 5, up to 81.

(GEN) Suicide:
During the game, press Select + Start to commit suicide.

(UNI) Stage select and Extra lives (added 09.03.14):
At the title screen, you must hold some buttons on controller 1 and press Select, when the right combination of pressings is done, the cheat will be enabled. There is a various ways to enable this cheat, for example you can hold Right, press Select twice, release Right, press Select twice, hold Right, press Select twice, release Right, press Select, hold Right, press Select, release Right, press Select three times. Or you can just hold Up + A + B, press Select, release the buttons, hold Up + Left, press Select, release all buttons, press Select twice. A sound will confirm correct code entry and the title menu corsor will reset to 1 Player option. Now, at the stage number screen, press A or B to increase or decrease the level number by 1, instead of 5 and this allows you to select stages up to 100, instead of 81. Press Start to increase the lives. Press Select to enable the far range robot weapon, instead of generic one. Additionally, if you increase the stage number above 100, the stage counter will be reset to 1, but now all levels will be more difficult, due to faster enemy and obstacles movement. This mode can be reached normally, when you beat more than 255 stages. This all is works for both, the first and the second players.

Crystalis, God Slayer - Haruka Tenkuu no Sonata

All versions:

(UNI) Game pause (added 08.01.08):
For pause the game press B on controller 2.

(FIX) Level warp:
During the game hold A + B on controller 1 then by pressing A on controller 2 you can cycle through 16 predefined places of the game.

Japanese version:

(UNI) Cheat mode (added 09.03.14):
Hold A + B on controller 1, then power off and on again the console, this doesn't work if you just reset the console. Now, during the game, press Start to enter the status screen. Press A on controller 2 to enable the super fast movement, press any D-Pad button to enable the invulnerability and add all items and equipment and 255 MP.

US version:

(BUR) GameGenie (added 09.03.14):
XTKLVYAV-Re-enables the cheat mode from the Japanese version. For the usage see the cheat above.
AXEPNEGG-Re-enables the debug shop routine, enter any shop and you can buy some special items instead of the generic ones.

Cyberball

(UNI) Soft reset (added 10.03.14):
During the game press A + B + Select + Start on any controller.

Cycle Race - Road Man

(UNI) Bike replace (added 19.07.13):
During the game press Down + B on controller 1 to ask for bike replacement at any time.

(UNI) Stage select (added 19.07.13):
Hold A + B at controller 1 then press Reset. Now you could select any stage on the map to race.

Dai Meiro - Meikyuu no Tatsujin

(UNI) Sound test:
Press A, B, Up, Right, Down, Left, A, B, Start at the title screen.

(UNI) Cheat mode (added 11.03.14):
At the title screen, select the "START" or "CONTINUE" options, hold A + B and press Start on controller 1. During the game, on controller 2, press A to instantly cleat current level, press B to refill POW meter, press Up to obtain all items at maximum amount (shows the full map, and movig direction as well).

(UNI) Secret passwords (added 06.06.09):
OWARIDAI-Ending sequence

Dai-2-Ji - Super Robot Taisen

(BUR) Hidden text (added 20.01.09):
There is some hidden version text in ROM:
Sirius Works 006
1991.09.27


(BUR) GameGenie (added 09.03.14):
GXKETAIA-Start a new game at the title screen, instead of prolog, you'll start at Sound Sample Editor, follow the instruction on the screen.
YXKEYEAL-One more debug menu with unknown functions, there is no seems the tilemap data left for this screen, only the input handler.

Daikaijuu Deburas

(UNI) Map select (added 06.07.08):
When you completed the game and your last save were between levels 15 and 16, you can use the cheat codes before starting a new game. Don't clear the SRAM data or save any other games to the last save slot to keep this ability. At the title screen, press Start, while intro cut scene is running, press Up, Down, Down, Down, Down, Down, Down, Up, Left, Left, Left, Left, Right, Right, Right, Down, Up, then press Start to select any map for the 1 player game.

(UNI) VS Map select (added 06.07.08):
When you completed the game and your last save were between levels 15 and 16, you can use the cheat codes before starting a new game. Don't clear the SRAM data or save any other games to the last save slot to keep this ability. At the title screen, press Start, while intro cut scene is running, press Left, Left, Left, Left, Right, Right, Right, Right, Down, Down, Up, Up, Down, Right, Left, then press Start to select any map for the versus game.

(UNI) Sound select (added 06.07.08):
When you completed the game and your last save were between levels 15 and 16, you can use the cheat codes before starting a new game. Don't clear the SRAM data or save any other games to the last save slot to keep this ability. At the title screen, press Start, while intro cut scene is running, press Up, Up, Down, Down, Up, Up, Down, Down, then press Start to listen the game music and sounds.

Daiku no Gen San, Hammerin' Harry

Japanese version:

(FIX) Invulnerability (added 19.07.13):
During the game play, press A to jump, while in midair, press Start to pause the game. Now press Up + A on controller 2 and Down + B on controller 1 at the same time. If done right, the game will be unpaused, and invulnerability flag will be toggled on. Your health bar also will be restored to 3. Do the same cheat one more time to toggle invulnerability off and refill the health bar once more.
Source: ReyVGM

European version:

(FIX) Invulnerability (added 12.03.14):
During the game play, press A to jump, while in midair, press Start to pause the game. Now press Up + A on controller 2. If done right, the game will be unpaused, and invulnerability flag will be enabled. Unless of the Japanese version, there is no possible to disable it back nor to refill your health.

Daiku no Gen San 2 - Akage no Dan no Gyakushuu

(UNI) Level select:
At the "Irem" logo, quickly press Up, Right, Down, Left, Up, Right, Down, Left, then start the new game.

(UNI) SE test:
After the "Irem" logo, during the intro sequence, hold A on controller 2 and press Start on controller 1.

(UNI) BGM test:
After the "Irem" logo, during the intro sequence, hold B on controller 2 and press Start on controller 1.

Daisenryaku

(GEN) Sound test:
Press Start on the title screen, select the third option ("マネー") and press B + Select to trigger a sound test.
Source: ReyVGM

Daiva - Imperial of Nirsartia

(UNI) Secret passwords (added 20.12.13):
たたかう-The Final Planet

Dalton McGuinty's Kids' Computer Game, M.C. Kids

(FIX) Suicide (added 27.06.14):
During the game, press Start, then press Select.

(UNI) Player 2 pause (added 27.06.14):
Any time during the game, except the dialogs, press or hold Select on controller 2 to temporarily stop the game.

(UNI) Unlimited lives (added 25.12.15):
Find all 6 secret and access the "Ronald’s PuzzLeWoRlD". In the bonus worlds, collect all arches, do not complete the stage, but die instead. Do this for all three stages, then go to the Ronald and he will give you an infinite lives.
Source: tcrf.net

Dancing Blocks

(UNI) Cheat mode (added 12.03.14):
After the "Sachen" logo disappear from the screen, hold A + Select then press Start. Release A, but while still holding Select press B, Start, A, B, Start, Up, Left, Down, Right, Start, Start, Start, Start, Start, Start, Start. If done right, three huge white kanji "陳關和" will appear on the screen and game will reset. This gives to you, an infinite lives, powerful weapon and ability to fire any direction at once and finally, you can select levels up to 65 with B, A still count up to 30.

(UNI) Hidden copyrights (added 12.03.14):
After the "Sachen" logo disappear from the screen, hold Up + Start. Release Up, but while still holding Start press Left, Down, Right, Up, Left, Down, Right, A, B, Select, A, B, Select, Select, Select, Select, Select. If done right, the copyright string will reappear on the screen alone.

Darkman

(UNI) Level select (added 23.06.09):
At the title menu, select the "HI SCORE" option, hold Right on controller 1 then press A or B. Now you will be in "DARKMAN CONTROL ROOM" instead of "RECREATION SYSTEM V1.00" and there will be password needed to access it. Enter "DERMA" as password. Now you can select any game sublevel and boss shooting, including the ending sequence.

(UNI) Soft reset (added 13.03.14):
Any time during the game, except the copyright screen, press Left + Select + Start on controller 2 to reset the game.

(BUR) Hidden text (added 13.11.08):
Most of the games programmed by Ocean shares the same music driver library all along with the hidden version and copyright string:
MUSIC DRIVER V1.0 (C)JONATHAN DUNN & OCEAN SOFTWARE


Dash Galaxy in the Alien Asylum

(UNI) Secret message (added 02.12.12):
During the game, pull at least 20 movable block to the elevator shaft. You can do this at any floor and continue to pull blocks even after death, no matter. Before the game over screen, all blocks pulled to the elevator are counts. When you pull the last block, a messages will appear, and after that you'll be rewarded with 10000 score points, 10 bombs, 10 keys and 10 detonators.

(FIX) Level select:
Press Up + Left + B + Select at the title screen. Press Up or Down to change the level number. Press Start to begin the game.

(BUR) Hidden text (added 26.02.10):
Game ROM contains the hidden version string:
Wed Sep 13 16:15:54 1989


(UNI) GameGenie (added 22.03.11):
XOOOSKNO+VEOOUKLZ-Brings back the copyright screen from the development stage. There is just "COPYRIGHT SCREEN" and "LICENSED BY NINTENDO OF AMERICA INC." text used.

Datach - Battle Rush - Build Up Robot Tournament

(UNI) GameGenie (added 26.03.14):
LEXKTEIA-Re-enables a complex Debug Menu and Sound Test instead of "FACTORY" menu option.
IPOXGAPO-Re-enables a password entry screen used to generate a Robot.
Source: tcrf.net

Datach - Dragon Ball Z - Gekitou Tenkaichi Budou Kai

(UNI) Selftest (added 22.07.13):
Hold Select on controller 1 and Select + Start on controller 2 at the same time, then press Reset. The game will perform a quick PRG bank switching test, and 8-bit summing for first and last bytes of every PRG bank. If test is pass, then game will continue normal operation. If fails, then screen will turn white and game stops.

Datach - J League Super Top Players

(UNI) Backup mode (added 22.07.13):
At the title screen, hold Select then press Start on controller 1.

(UNI) Credits (added 22.07.13):
At the title screen, hold Down + Left + B + Select then press Start on controller 1.

Datach - Ultraman Club - Supokon Fight!

(GEN) Backup mode (added 22.07.13):
At the title screen, hold Select then press Start on controller 1.
Source: ReyVGM

(UNI) Selftest (added 22.07.13):
Hold Select on controller 1 and Select + Start on controller 2 at the same time, then press Reset. The game will perform a quick PRG bank switching test, and 8-bit summing for first and last bytes of every PRG bank. If test is pass, then game will continue normal operation. If fails, then screen will turn white and game stops.

Datach - Yuu Yuu Hakusho - Bakutou Ankoku Bujutsu Kai

(GEN) Backup mode (added 22.07.13):
At the title screen, hold Select then press Start on controller 1.
Source: ReyVGM

(UNI) Unknown (added 22.07.13):
Any time during the game, hold Start then press Select. The $0469 should be 3 or higher. The mode where it changes is unknown, but present somewhere in the game. This mode sets NMI sub index $7F, the last one, there you can change some values on the screen, seem like some player data editor.

Datsugoku, POW - Prisoners of War

(GEN) Extra 21 lives:
Press A, B, B, Up, Up, Down, Left, Start at the title screen.

(UNI) GameGenie (added 07.07.10):
IPKGAKIY+XTNKGTAV-The GameGenie code enables in-game level select cheat routine. To use it on controller 2 press A to switch level select mode on or off, press Right to cycle from 1 to 5 level number. Then press B to advance to the selected level.

Day Dreamin' Davey

(BUR) GameGenie (added 14.12.12):
TXNLOUOL-Mostly removed cheat screen from the early stage will replace the regular title screen menu. Although, it will work just like regular menu.
Source: tcrf.net

Days of Thunder

(UNI) Hidden message (added 16.12.12):
At the title screen, when "PRESS START TO PLAY" is displayed, hold A, press B 4 times, release A, hold A, press B 1 times, release A, hold A, press B 26 times, release A, hold A, press B 5 times, release A. So this stands for word "DAZE" (D is a fourth letter, E is a fifth, etc...). A "GALERY" screen will appear. Press A to advance to the next secret screen. There is a total 9 secret screens with dot pictures of the game developers.

Deadly Towers, Mashou

(UNI) Debug mode:
Several debugging tools can be activated via the Family BASIC keyboard. Hold A + B on controller 1 along with one of the following keys, then reset the console:
@-CHR RAM test
L-CRC test
M-Monitor adjust
C-Color adjust
T-Timer on
S-Sound check
ESC-Reset
Source: tcrf.net

(BUR) Hidden text (added 02.11.08):
The game ROM contains a funny hidden copyright message:
DISASSEMBLE? HELLO ! THIS IS DISASSEMBLE MESSAGE FOR YOU.
THIS PROGRAM WAS MADE IN JAPAN TOKYO 10 NOV 1986 COPY RIGHT BY
IREM CORP.PROGRAMMED AND LICENSED BY LENAR SPLENDOR
TEAM  GOOD BYE !!!


Deathbots

(UNI) Extra 60 lives (added 26.06.13):
At the copyright or the title screens, press on controller 2 A, B, Start then on controller 1 A, B, Start to begin the new game with extra 60 lives instead of 5.

Deep Dungeon 3 - Yuushi heno Tabi

(UNI) Maximum experience (added 22.07.13):
At the main menu, enter the "Load Saved Game" option, then select any game to play, hold Left then press Start. Release all buttons, then enter the code Up, Down, A, Select, Left, Start, B, Up, Down. All of your 4 characters will now have maximum of 65535 experience points.

Deep Dungeon 4 - Kuro no Youjutsushi

(GEN) Secret words:
Enter this word as player name:
みさりん-After a first battle, you'll gain 27 levels at once.
Source: ReyVGM

Defender II, Star Gate

US version:

(BUR) Hidden text (added 04.12.08):
There is some hidden copyright text in ROM:
 DEBUGED BY TOSHIO SENGOKU  ( Intelligent Systems )  1987/07/31 15:00 


Demogorgon Monk

(BUR) GameGenie (added 14.03.14):
XTKNKYAV-Re-enables the generic type of debug display for many of Waixing's games.

Demon Sword, Fudou Myouou Den

US version:

(FIX) Password screen (added 24.10.07):
At the title screen, hold Up then press A, B, A, B on controller 1. Password code have internal abuse filter, passwords with words "FUCK" or "SEX" at any position always fail.

(GEN) Gain password:
At the game over screen hold Down then press B, A, B, A on controller 1.

All versions:

(BUR) Hidden text (added 14.03.14):
The game using string
Yoshikawa
to determine if it was hard or soft reset.

(BUR) GameGenie (added 14.03.14):
AESNNNNY (for the US version)
AENNONNY (for the Japanese version)
-Re-enables debug leftovers. During the game press B on controller 2 to skip current level. During pause you can add any items and ammo to your inventory by using the D-Pad buttons and A on controller 2, enable the invincibility by pressing Left + B on controller 2 for the the US version or on controller 1 for the Japanese version.

Densetsu no Kishi - Elrond, Wizards & Warriors

(BUR) Hidden text (added 08.02.13):
Almost every bank in the English versions of game starts and ends with the same copyright text:
(C) COPYRIGHT 1987 RARE LTD. ENGLAND.
In the Japanese version the same string present at the start of every bank, but ends with
[ PP + RME ] (C) COPYRIGHT 1987 RARE LTD. ENGLAND.
Additionally, in the Japanese version the RESET routine check if game was soft reset using string
PP + RME
while the English versions have another string there
ThE tAlE
Initial stands for Paup Proctor and Rachel M. Edwards.

Derby Stallion - Zenkoku Han

(GEN) Sound test and CHR viewer:
On the title screen, hold Right + B on controller 2 and press Start on controller 1 to enter a combined sound test/CHR viewer.
Source: ReyVGM

(GEN) Ending sequence:
At the title screen, on controller 2, hold Up + B and wait until the demonstration starts.
Source: ReyVGM

(UNI) Horse stats (added 14.03.14):
During the game, in the stables, select any horse from the left part of the field, then on the info screen on controller 1 press Select, Left, Up, Left, Up, Right, Up, Start to see all numerical parameters of the selected horse.

(UNI) Extra 5bil yen and instant Ending sequence (added 14.03.14):
During the game, in the stables, press B to enter the main menu, enter the last option ("SAVE"), press Select to enter the "TURBO FILE" menu, now on controller 1 press Right, Up, Left, Left, Down, Up, Down, A, after the message about loading, another message will appear, means you have now extra 5 billions yen and you can see the ending sequence instantly without using the cheat above, just wait for the demonstration.

Destination Earthstar

(UNI) Cheat mode (added 17.03.14):
To enable the cheat mode, hold Down + Select and press B, B, B on controller 2 during the game play. Release all buttons and you will hear a sound confirm correct code entry. Then press one of the following combinations on controller 2 to get corresponding effect.
Right + A + Start-Advance to the next level.
Left + B + Select-Repair damage during the space flight levels.
Up + Right + A-Difficulty of the flight levels (?). Need to investigate.
Left + B + Select-Extra 9 lives during the planet flight levels.

(UNI) Easter egg 1 (added 17.03.14):
At the game over screen in the planet flight levels, hold Left + A + B on controller 1 to reverse the "GAME OVER" message to "REVO EMAG" for some strange purpose.

(UNI) Easter egg 2 (added 17.03.14):
During the planet flight levels, when the Shield is obtained, hold A + B on controller 1 then press Up or Down to make the ship rotate around instead of sliding up or down.

(UNI) Disable music (added 17.03.14):
During the game, in the space flight levels, pause then unpause the game by pressing A + B twice on controller 1 to disable the backround music. In the planet flight levels, pause the game by pressing Start or Select then press A + B on controller 1.

Destiny of an Emperor, Tenchi wo Kurau

(GEN) Sima Yi thunder defense:
This is not actually a cheat, the button-code Up, Up, Down, Down, Left, Right, Up, Down need for defending from Sima Yi thunder attack and can be acquired by talking with some people in the game.

Dezaemon

(GEN) Sound Tets:
On the title screen select the 7th option, then press Select + Start to trigger a sound test.
Source: ReyVGM

(GEN) Block Master:
While in the above sound test, press Select + Start once more to end up in a menu with various graphics tests, including a CHR viewer.
Source: ReyVGM

(BUR) GameGenie (added 18.03.14):
XVUSVPAV-Re-enables some unfinished zooming effect for intro or just for some tech fun. There should be some graphics which is displaying with this effect and slowly zooming, but currently it's using the default font data.
XTKIAGAV-Re-enables the debug ingame cheat. During the game press Select to cycle trough the weapons, press A to increase the current weapon power.
PESKPIYE+UKSKZIVG-Some debug display can be seen with this code. Enter the "BLOCK MASTER" mode as described above, then press Select to cycle throug different parameters display, meant to be called during the game play, but there is no proper font data, so even if this called there, it's impossible to see something useful.

Diablo (Nanjing)

(UNI) Secret message (added 25.03.14):
During the game, while in conversation mode, hold Up + Select + Start on controller 1 and skip with A to the end of the dialog. The copyrigh string will be displayed in the dialog box, but the proper graphics or text was removed from this version of the game. This cheat can be found in a couple of Nanjing games on the same engine.

Die Hard

(UNI) Speedup time (added 24.11.12):
During the game, pressing Start brings you to the status screen, where the time is stop. Press A + B + Select while in the status mode screen to run and speedup the time. It will lead to increase locks counters, and then the final time to leave the building. If you skip all this time, the game will over. Also this can be done during staircase events, when the game displays how much time you spent on climbing to another floor of the building.

(UNI) Continue (added 24.11.12):
Immediately after you were killed, before screen fades out, hold Down + A + B + Start. After the game over screen the "Continue" screen will show up. You have only two continues there though.

(UNI) Picture test (added 24.11.12):
At the difficult select screen, hold Up + Left + Select before starting a new game. Press A, but before the new game starts, you'll see all in-game splash screens with just one the same text: "Theo: "Lock one is down, Hans! I Estimate about a half hour to go!".

Dig Dug

(BUR) Hidden text (added 22.03.11):
The RESET routine in this game uses first 16 symbols of generic Namco copyrights
COPYRIGHT 1982 1985 NAMCO LTD. ALL RIGHTS RESERVED
inside the ROM to check if game was soft or hard reset.

Dig Dug II

(GEN) Level select:
Ususally, you can start with any level you already beat during your game. When the title screen stops moving press A + Select + Start to max out the beaten level counter to 72, so you can select any level.

(FIX) Infinite lives:
Enter the Level Select cheat and start on level 15. Kill a single enemy so your score reads 200 points. Kill off all your lives and at the game over screen, press B on controller 2 and A on controller 1 at the same time. Now start your game again and your lives will read "HERANAI".
Source: ReyVGM

(BUR) Hidden text (added 22.03.11):
The RESET routine in this game uses string
K.N.
to check if game was soft or hard reset. Also it contains generic Namco copyrights:
COPYRIGHT 1982 1986 NAMCO LTD.ALL RIGHTS RESERVED


Digger - The Legend of the Lost City, Digger T. Rock - The Legend of the Lost City

(GEN) Morse code cheats:
At the copyright screen, using A you can enter the one- or two-letter Morse codes. The first letter can be either C ("-*-*") or D ("-**"), which stands for "Continue" and "Demo" options which will be enabled. The second letter can be either R ("*-*"), L (*-**) or X ("-**-") which stands for "Rocks", "Ladder" or "Explosives" items which will be added and unlimited. The second letter can be entered only if the first letter is correct. To enter the Morse codes, press A for a short time for "*" and for a long time for "-", so combine short or long continuos pressings in one Morse letter, then wait. If done right you'll hear the Letter dubbed with sound. Enter different combinations of letters to obtain different effects enabled, but no more than 2 effect at once. For example, if you enter "CL", you'll obtain one continue and unlimited ladders. If you enter "DX" letters, then you'll obtain the unlimited explosives, and can watch the full demo sequence for the second cavern, which will show you a complete level walkthrough.

Digital Devil Monogatari - Megami Tensei

(UNI) Easter egg (added 05.05.12):
There is a specific monster encounter appears in the game. It's a BULL, which is flipped upside-down, with "BUG" text on his side. The game contain some Easter egg concerning this "BUG". When you encounter this enemy in battle, hold Down + Left + A + B on controller 2, then select option "AUTO" to start the automatic battle mode. The generic message about your character being fighting with a monster ("ナカジマたちはたたかっている。", which means "Nakajima and others start fighting."), will change to the secret message: "カブちゃんはDEBUGをはじめて。", which means "Cabu-chan begins debugging.".

Digital Devil Monogatari - Megami Tensei II

(UNI) Enemy stats (added 30.04.12):
After the game ending sequence (which is shows you all of bosses/places you've encountered during the game), the screen "END" will appear and loops. But if you hold Up + Right + A + B or Up + Left + A + B on controller 2 and Up + Right + A + B + Select + Start or Up + Left + A + B + Select + Start on controller 1 at the same time, the "END" screen will disappear and you will see all the enemies/bosses/monsters and demons with it's names, levels, HP/MP stats. All monsters are sorted by classes, and by levels from the higher ones to the lower ones. After all monsters are displayed, "DDSII" logo will continuously flashing on the screen, each roll changing colors from the whole colors palette.

(GEN) Sound test:
In a town, stand in front of the building where the save/warp Totems are and enter the building while holding Up + Right + A + B on controller 2. If done right, you'll get a sound test menu instead of the save/warp menu.
Source: ReyVGM

(BUR) Hidden text (added 02.11.08):
The RESET routine in this game uses string
DDSII PRESENTED BY ATLUS & PROGRAMING BY COZY
to check if game was soft or hard reset.

(BUR) GameGenie (added 05.02.13):
GEXYNIEI-Some of the Namco games, which uses the 19 mapper PCB, contains also the specific self-test routine. It can test and initialize the internal RAM buffers. Similar to the other Namco games series, in order to run these tests, you must plug in a special device to the famicom expansion port. This device is much simpler than mentioned another device. It just takes one bit of data and immediately returns it inverted to the data port, there is no FIFOs inside. When the program detects the device presence, it performs RAM test and initialization. If RAM is already tested/initialized, the screen will turn blue. If RAM isn't initialized, but after init and test all is fine, then screen will turn yellow or pink. If, even after the reinitialization, RAM test fails, then screen will turn red. After the tests, program goes to the infinite loop, so yo must unplug special device to boot into the game. Using this Game Genie code you can skip the special device check and just directly to the RAM initialization routine. This game tests it's WRAM.

Dirty Harry

(FIX) Secret passwords:
MYSTY-Level 2
BYRD-Level 3
CLYDE-Invulnerability

Dizzy The Adventurer

(UNI) Smiley test:
Absolutely all games by Codemasters have internal PRG ROM and CHR RAM testing routines. So called "Smiley tests". Tests are normally enabled, but for triggering it needs pressing all D-Pad buttons. Hold Up + Down + Left + Right + A + Select + Start to enter the PRG ROM test or hold Up + Down + Left + Right + B + Select + Start to enter the CHR RAM test, and press Reset. A green smile means that test passed, red sad face - failed.

(UNI) Soft reset (added 18.03.14):
During the game press A + B + Select + Start on controller 1 to return back to the title screen.

(UNI) Free movement (added 18.03.14):
During the game press Start to pause it, then hold Up + A and press Start again. Now, any time hold A + B + Select and move your character using the D-Pad buttons to any location. Be careful, some locations are still deadly.

Doki! Doki! Yuuenchi, Trolls in Crazyland, The

(UNI) Secret passwords:
"DB !"-First ending sequence
"DW *"-Second ending sequence
"!MGB"-Sound test
"Z!N*"-Secret message + Extra 99 Lives (The European version haven't a secret message but 99 lives is still there).

(BUR) GameGenie (added 03.01.08):
LAVINNKO+OTVSEYVS (for the Japanese version)
IUXSNVZL+EVUIETVS (for the European version)
-Choose PASSWORD on the title screen to access a Stage Select menu. Press Left or Right to change the stage number (includes mid-stage checkpoints), B to reset the number to 0, and Start to start the game. You can also choose stage FE to view the first ending sequence, or stage FF to view the second.
Source: BMF54123

Dokuganryuu Masamune

(BUR) Hidden text (added 22.07.13):
The RESET routine in this game uses string
michiya dameyo
to check if game was soft or hard reset.

Don Doko Don

(UNI) Extra 12 credits (added 08.03.09):
At a player select menu press Left + A, Up + A, Right + A, Down + A, Right + A, Left + A, Down + A.

(GEN) Reverse rounds:
Don Doko Don features a hidden password prompt in the very first level. Above the top most platform, jump and swing your hammer. You will see the outline of an invisible bubble. Keep swinging at this bubble to release a key, this key opens a door to the password prompt. You have 15 seconds to input the password, so move quickly. Hammer the jar with the proper card suit display to input each part of the password in this order: Spade, Diamond, Heart, Club, Diamond, Heart, Spade, Club. When the proper order has been inputted, you will be taken to Reverse Rounds.

Don Doko Don 2

(BUR) GameGenie (added 27.09.07):
EAUEAKYG-Enable Stage Select Menu cheat.
To enable Stage Select Menu press A, A, A, A, A, A, A, A.
AGUAAKYG-Enable BGM Test Menu cheat.
To enable BGM Test Menu press A, A, B, B, A, B, A, B.

Donald Land

(UNI) Level select:
At the title screen, before the Ronald has jumped from the window, press A, B, Right, Left at the title screen, then hold one of the following combinations and press Up on controller 1.
A-Level 1 - Home Town World
B-Level 2 - Lake Side World
A + B-Level 3 - Forest World
Select-Level 4 - Sky World
A + Select-Level 5 - Oasis World
B + Select-Level 6 - Cave World
A + B + Select-Level 7 - Pond World
Right-Level 8 - Harbor World
Right + A-Level 9 - Ocean World
Right + B-Level 10 - Ghost Town World
Right + A + B-Level 11 - Dark Forest World
Right + Select-Level 12 - Castle World

(BUR) GameGenie (added 19.03.14):
TEULLSIE-The Level Select cheat be able to display the Ending sequence as well, but seems this was disabled in the final release. With this code you can use the combination Right + A + Select for the cheat above to access the Ending sequence.

Dong Dong Nao II - Guo Zhong Ying Wen

(UNI) Hidden game (added 07.04.10):
At the title screen, press Up, Up, Down, Down, Left, Right, Left, Right, B, A then press Start to start a hidden "Pyramid" game instead of learning English.

Donkey Kong Country 4

(UNI) JY company's Easter egg:
At the title screen, press Up, Down, Up, Down, Left, Left, Right, Right.

Doraemon

(GEN) Continue:
At the game over screen, hold any D-Pad button (e.g., Up), then press Start.

(FIX) World warps:
At the title screen, press Select on controller 1 a number of times corresponding to the desired level from to table below, then hold A + B and press Start. Note, that if you use these cheats and beat the game, you doesn't see the ending credits. After the final screen the game will return to the title screen.
0 times-World 1 with intro skipped
1 time-World 2
2 times-World 3

(GEN) Super Prize:
At World 1, kill enemies in a particular sequence: KOBUN (Red man with black hat), KOBUN, NAME (Caterpillar), GOZURA (Creature with the tube instead of nose), YUBOU (some kind of UFO), KOBUN, KOBUN. A new prize will appear, it gives you invulnerability for 15 seconds.

(GEN) Programmers Face:
At World 1, go to the final boss building, go to the right of the front door and up in a cavity. Shoot continuosly in the middle of location and shout tho the microphone at the same time. After a while a special item with programmer's face wil appear. It will add you 80000 points.

(GEN) Kill all enemy:
At World 2, after the resque of "Gian", shout at microphone about 3 seconds. All enemies will die.

(UNI) Debug mode and Easter Egg (added 30.01.15):
This can be done only for World 3. Before the World number screen appears, hold Up + Left + A + B + Select + Start on controller 1 and Down + Right + A + B on controller 2 at the same time. During the game use D-Pad on controller 2 to jump to the next screen in corresponding direction. Press A + B on controller 2 to show the Easter screen with blue DORAMI and word "KiKu". You can use World warps cheat to reach World 3, but instead of just A + B you must hold complete combination for Easter at the title screen.
Source: tcrf.net

(BUR) Glitch easter (added 02.02.15):
At World 3, in the very first room, try to swim very close to the leftmost-bottom part of the screen, in a cavity under the rock. Fire continuosly there and shout in the microphone at the same time. The code should jump to some location at the end of PRG bank, but there is no code at all and space filled with $FF. So the game breaks on the BAD opcode and jumps to the reset. So you just return back to the title screen. It is unknown whether this code was removed or unfinished, but this cheat is part of the Debug code handler above.

(GEN) Cave easter:
At World 3, there is a room on third level, seventh from left (index $16) with dead end cave and sandy floor. Shout in the microphone about 2 seconds and in the middle of the cave DORAMI character will appear as well as every single item needed to complete this level.

(BUR) Hidden text:
The ROM contains some hidden copyrights and version info text
DORAEMON WORLD3 WRITTEN BY KIKU VER1.9 86/10/31
"KIKU" is a programmer of HUDSON Kikuta Masaaki (菊田昌昭. He put secret codes with messages almost in all his games under HUDSON label.

Doraemon (Waixing)

(UNI) Stage select (added 20.03.14):
At the title screen, press A, B, Select, Up, Down, Left, Right, A then press Start.

Double Dragon II - The Revenge

All versions:

(BUR) GameGenie (added 20.06.08):
There is some common feature in some Technos games like "SAMPLE VERSION" flag, allowing you to have some extra or debug features in game. Depending var is at $FFF6 address and uses some bits set to enable hidden features.
AXNYVYAA-Bit 5. Enables free level mode, you can walk to any level position any time.
EKNYVYAA-Bit 7. Enables "SAMPLE VERSION" mode. In this mode some debug features available:
In game hold on controller 1 Select then press on controller 1 A to skip current level, B kill all current enemies and advance to next point, Up or Down to kill one nearest enemy at front or back side.

US version:

(UNI) Continue (added 22.05.11):
The Japanese version of this game have "Continue" after the game over screen by default. The US version haven't continues normally, but you can use it with this cheat code. At the game over screen press one of the following combinations to enter the "Continue" mode and start again from the last played level.
on controller 1 Up, Right, Down, Left, A, B-For Levels 1-3
on controller 1 Up, Down, Left, Right, B, A, A-For Levels 4-7
on controller 2 A, A, B, B, Down, Up, Right, Left-For Levels 8~

Japanese version:

(BUR) GameGenie (added 20.06.08):
There is a lot more disabled features in game since development stage. The byte sequence is "A9 00 F0" for such disabled code branches. Just replace 0 to 1 to enable it back. Some of them may cause glitches.
PENNGLAA-Different title menu like in the English versions.
PAKNYAAA-Enables copyright screen as in the English versions, but since there is no latin letters message completely unreadable.
PEKOYGAA-Re-enables difficult limits, do not allowing you play further 4th level on "PRACTICE" and further of 8th level on "WARRIOR" mode.

Double Dragon III - The Rosetta Stone, Double Dragon III - The Sacred Stones

(UNI) Title screen skip (added 23.12.13):
At the "TECHNOS" logo screen in the US version, hold A + B on controller 1 and wait until the screen fades out. There is no such skip in the Japanese version.

(BUR) GameGenie (added 20.06.08):
There is a common feature in many Technos games like "SAMPLE VERSION" flag, allowing you to have some extra or debug features in game. The var is at the $FFF6 address and uses some bits raised to enable hidden features.
EXNYVYAA (for the US version)
EXNYVYAA+XVNXAPAV (for the Japanese version)
-Re-enables some debug features. First, it will enable the free walk feature, so you can walk to any point of the level without need to beat some enemies first. Second, is the pause debug options. During the game, hold Start, then press one of the buttons from the table below to get corresponding effect. Release the Start to apply features. Note, that in the US version you must enable the pause debug mode first. To do that, at the "TECHNOS" logo, hold Down + Left + B and wait until the license screen appears. You don't need to do this in the Japanese version, but most of the debug features was disabled, so you need to enter additional GameGenie code to re-enable the full set.
A-Skip to the next location or Stage.
B-Make all the characters selectable during the game, but doesn't update the selection screen properly, so you couldn't see all the character icons anyway.
Up-Remove the first enemy instantly.
Down-Remove the second enemy instantly.
Left-Restore full health for both players.
Right-Drops health to 0 for both players.

Double Moon Densetsu

(FIX) Playable girl character:
At the main game menu, select the "Start a new game" option (first, then first again), hold A or B on controller 2, then press A on 1.
Source: ReyVGM

Double Strike, Twin Eagle (Sachen), Shuang Ying (Joy Van)

(UNI) Extra 30 lives (added 20.03.14):
A the title screen, press Up, A, Down, A, then start a new game.

Dough Boy

(FIX) Extra 30 lives (added 22.07.13):
Hold Left + A + B on controller 2, then power the console off then on again.

Downtown - Nekketsu Koushin Kyoku - Soreyuke Daiundoukai

(UNI) Watch the game (added 20.03.14):
At the Technos logo screen, hold Up + Select then wait for the title screen. Start a new single player game, 1P must be in the firs position, then setup the game parameters as you like. When all this done right, the game will start with all 4 players being controlled with the CPU, so you can just sit and watch.

(BUR) GameGenie (added 20.06.08):
There is some common feature in some Technos games like "SAMPLE VERSION" flag, allowing you to have some extra or debug features in game. Depending var is at $FFF6 address and uses some bits set to enable hidden features.
AXNYVYAA-Bit 5. The debug display during the game at the top-right corner of the screen.
EKNYVYAA-Bit 7. Enables cheat mode. In this mode some debug features available:
In game hold on controller 1 Select then press on controller 1 A or
B% to skip current location or win current level accordingly. If you additioanlly press Down with A or B, you can just skip level with your current results/points, so you can loose as well.

Downtown - Nekketsu Monogatari, River City Ransom, Street Gangs

English versions:

(GEN) Easter egg (added 27.08.11):
Start a new game. Go to game menu, then select and enter "STATUS" screen. Press Down + Left on controller 2 and Right + Select on controller 1 at the same time. A screen with Riki and Kunio pictures will appear.
Source: ReyVGM

Downtown Special - Kunio-kun no Jidaigeki Dayo Zenin Shuugou!

(UNI) Auto fight (added 24.03.14):
At the game mode selection screen before the game start or during the game, move cursor to the character selection option, hold Down + B on controller 1 then press Start. If done right, you will automatically start a new or continue current game, but now when any encounters appear on the screen, you'r character will fight automatically, just like your CPU opponent. Anyway, you still can control it yourself and fight if you want, or travel by your own. You can see if cheat is working, when your character will always turn face-to-face to your CPU controlled player if you stay still a while.

(UNI) Disable AI (added 24.03.14):
As the opposite type of cheat to the previous one, at the game mode selection screen before the game start or during the game, move cursor to the character selection option, hold Right + B or Left + B (according to the game mode you prefer) on controller 1 then press Start. If done right, you will automatically start a new or continue current game. From now, any encounters on any location will be helpless dummies, doesn't able to fight.

(GEN) Secret words (added 24.12.13):
At the game mode selection screen, press Select and enter this word as a player name.
こがねむし-All Techs and 990200 ryo for your characters.

Dr. Jekyll and Mr. Hyde, Houma ga Toki

(GEN) Stage skip (added 22.07.13):
At the title screen, when the title menu cursor points to the "START" option, press B on controller 2, then press Up, B, Right, Left, Down, Right, Left, A, B, Right, Select, B, Down, Start. During the game press A on controller 2 to skip the current level up to the ending sequence, or press B on controller 2 to switch between the Dr. Jekyll and the Mr. Hyde modes.
Source: ReyVGM

Dr. Mario

(GEN) Soft reset:
Press A + B + Select + Start during the game.

Dragon Ball - Dai Maou Fukkatsu

(BUR) GameGenie (added 26.03.12):
NNNYEYAE-Disabled debug feature, allow to skip game cut scenes/events/fights and dialogues. Just press A on controller 2.
NNNYOYAE-Selectable events at the end of each move. Just select one of 5 cards to choose one of events modes.
NNNYXYAE-Disabled level select/continue. Not working properly. Hold A on controller 2 before selecting CONTINUE mode at the title menu.
NNNYUYAE-Disabled fight debug, press Up/Up + B on controller 2 to increase/decrease your health or Down/Down + B to increase/decrease enemy health.
NNNYKYAE-Disables debug feature, allow to move your character without spending moves or triggering events. Just hold A on controller 2 before moving.

Dragon Ball, Dragon Ball - Shen Long no Nazo, Dragon Power

European version:

(GEN) Level skip:
Press B on controller 2 to skip stages.
Source: ReyVGM

(GEN) Refill energy:
Press Down on controller 2 to refill your energy.
Source: ReyVGM

Dragon Ball 3 - Gokuu Den

(BUR) GameGenie (added 26.03.12):
NNNYEYAE-Disabled debug features.
Press B on controller 1 then press Reset to enter fight debug mode.
During fighting events hold A on controller 1 then press Up to select your enemy. Also works holding A then pressing Down or holding Up or Down at the end of move to instant kill player or enemy accordingly.

Dragon Ball Z - Kyoushuu! Saiya Jin

(BUR) GameGenie (added 24.03.14):
YASEGXGA-Re-enables the complex debug settings menu, where you can toggle on/off a lot of various features used to debug the game, such as free map movement, battle win, level skip, etc. Need to investigate.

Dragon Ball Z II - Gekishin Freeza!!

(BUR) GameGenie (added 25.03.14):
NNNKNZAE-Re-enables similar to the Dragon Ball Z debugging flags. Unfortunately, there is no more working menu to modify these flags, so enter this code and just reset the game to have all flags on permanently.
With these flags, using the buttons on controller 2, you can pause battle, win or skip current battles, switch maps, and additionally when script sequence is in progress, a number will appear at the top-left corner of the message window. Press A or B, , o, n, 2 to change to the different script scenes instantly.

Dragon Ball Z III - Ressen Jinzou Ningen

(BUR) GameGenie (added 25.03.14):
AOSNEYAA-Starts a game with unfinished Tournament Mode. It have numerous issues with menus and graphics, as well as some planned game modes isn't implemented as well and just crashing the game.

Dragon Buster

(GEN) Second Quest:
At the title screen, enter Right, Down, Up, Left, Right, A, B, Start. You'll know the code was entered properly if the background color of the map is red instead of green.

(BUR) Hidden text (added 23.06.09):
The RESET routine in this game uses string
D.BUSTER
to check if game was soft or hard reset. Also the game contains some hidden copyright text at the end of the ROM:
HARUHISA.UDAGAWA & KUMI.HANAOKA


(BUR) GameGenie (added 23.06.09):
GAUYNTEI-There are a series of the Namco games, made by the same programmers Haruhisa Udagawa and Kumi Hanaoka, that contains the same self-test for the data integrity. To enable any of these tests you need a special device that should be plugged into the expansion port. The operation of that device is very simple. It should accept the data bit from the data input port and return it back inverted to the output data port. The device consists of 4-bit shift register, working as some sort of the FIFO buffer. The input bits are goes to the input and then shifted to te output after a 4 cycles. At the game's boot, it tries to send some special data to the device. If the data output doesn't match the data input inverted, then the game continues the normal operation. But if all data (usually 32, rarely 64 bytes) is matches, self-tests will be performed. The program calculates 24-bit partial checksums for the PRG (excluding the last 8K) and the CHR data, summing only every 15th byte, and comparing it against the etalon. Before testing of the PRG data, the background color turns red, before testing of the CHR data, it turns green. If any of these tests are failed, the program will jump directly to the reset routine. It means, one of these tests will be performed infinitely, but until the special device is plugged in, or until the test are passed. Normally, you'll see the red to green flash just before the game's boot. Or the static red screen if the PRG data is bad, or the flashing red to green screen if CHR data isn't good. Using this Game Genie code you can skip tests for the special device presence and jump straight to the integrity tests.

Dragon Buster II - Yami no Fuuin

(BUR) GameGenie (added 23.07.13):
PENNOYAA-Enables a simple debug mode. Press Left / Right on controller 2 to jump to the previous / next level. Hold A on controller 2 then move the character to any location using controller 1 during both map and dungeon modes. During the dungeon mode additionally press B on controller 2 to restore lives and energy and add an extra 16 arrows.

Dragon Fighter (Sofel)

(GEN) Expert mode:
Press A, A, A, A, B, B, B, B, A, B, A, B, A, B, A, B when message "PRESS START" appears on the title screen. Text on the screen will turn red to confirm correct code entry.

(UNI) Sound test:
At the title screen, hold A + B then press Start.

(UNI) Level select:
Hold A + B button on controller 1 and press Reset, continue holding A + B after the title screen appears about 30 seconds. A sound will notice you that the cheat is enabled and you can release the buttons. Before the demo sequence starts, you can hold one of the following buttons on controller 2 to select desired level and then press Start on controller 1.
Right-2 level
Down-3 level
Up-4 level
B-5 level
A-6 level

(FIX) Restore energy (added 16.01.10):
Any time during the game you can restore your energy. Each level have it's own cheat sequence for that. Pause the game then enter one of the following codes according to the current game level to restore the energy.
A, A, A, A, B, B, B, B-1 level
A, B, A, A, B, A, B, B-2 level
A, B, Up, Up, A, B, Down, Down-3 level
Up, Down, Left, Right, A, B, A, B-4 level
A, Up, B, Down, A, Left, B, Right-5 level
Up, Down, Up, Up, Up, Up, Down, Up-6 level
Source: ReyVGM, Yakovlev Victor

(BUR) GameGenie:
ZEVEUSLE (for the Japanese version)
ZAUANNLE (for the US version)
-The Japanese version of this game have a disabled cheat test routine, means the both Sound and Obj Test modes were available and should've been enabled first, the same way as the Stage Select cheat. After enabling the Stage Select mode you need to hold B + Select, then press Start on controller 1 to access the Obj Test mode, and hold A + Select then press Start on controller 1 to access the Sound Test. The Game Genie code just replaces the Sound Test mode with the Obj Text mode. It is possible to reenable the cheat routine itself, but it need more GG codes, than this one. The US version have this cheat totally removed, so this GG code is only option to see the Obj Test mode.
XTKGETAV-Re-enables the development stage routine for both versions. To enable it you must enable the Stage Select code first, then during the game press Select to change the power mode, also you can see the CPU usage meter as gray line on the screen. Some unknown function can be enabled by press A on controller 2. Only visible effect for this is a unrevertable game pause.

Dragon Fighter (Flying Star, Unlicensed)

(UNI) Ending sequence (added 23.06.15):
At the title screen, hold Down + A + B on controller 2 and wait for a couple of seconds.

(BUR) Hidden text (added 23.06.15):
There are hidden copyrights inside the game:
Programming by Peter Lai , Hardware design by Tony Tseng .


Dragon Quest, Dragon Warrior

US version:

(BUR) Hidden text (added 24.06.09):
The SRAM initialization routine for this game uses string
KEN MASUTA
as SRAM signatures to check save banks integrity.

Dragon Quest II, Dragon Warrior II

All versions:

(UNI) Weird easter (added 26.03.14):
During the game, your position on the map should be $EB,$00 and $31 flag should be $00 (normally $01 on the world map, $40 in the dungeon, etc.) After a fight in this partucular location, when the reward is displayed, hold A on controller 2, then press A on controller 1. This will cause the message speed flag to be increased by 1 (var $62C, for fast is $28, normal $46 and for slow $FF). Only noticeable effect of this cheat would be different speed for different parts of the game, dialogs shoul be now slow speed, but fight message speed should be fast or normal if was slow.

Japanese version:

(GEN) Name easter:
In the Japanese version, the Prince and Princess' name are already predetermined. If you want to change them, just start a new game, type the Hero's name and before entering the last letter, hold Select + Start and enter the last letter. If done right, you'll be taken to a second name entry screen where you'll be able to name the Prince and then the Princess.
Source: ReyVGM

Dragon Quest III, Dragon Warrior III

All versions:

(UNI) Forbidden names (added 26.03.14):
There is a forbidden name for name entry screen for both regional versions of the game. In the Japanese version you couldn't enter a name "ろと". For the US version, forbidden name is "Erdrick" in any combination of letter cases.

(BUR) Hidden text (added 24.06.09):
SRAM initialization routine for this game uses string
MANABU YAMANA
as SRAM signatures to check save banks integrity.

US version:

(BUR) GameGenie (added 26.10.15):
AEENSNNY-Re-enables some debug leftovers. During the game hold B on controller 1 to move throught the walls and obstacles in both map and town modes. However, this doesn't disables the random encounters and game events, and you may get a glitch sometimes.

Japanese version PRG1:

(UNI) No random encounters (added 26.03.14):
This cheat was NOPed in PRG0 versions for all regions, but for some reason it was re-enabled in the PRG1 of the Japanese version. During the game, hold A on controller 2 while walking on the world map, the random encounter won't bother you anymore. Release this button to meet the enemy again.

Dragon Quest IV, Dragon Warrior IV

(BUR) Hidden text (added 24.06.09):
SRAM initialization routine for this game uses string
MANABU YAMANA
as SRAM signatures to check save banks integrity.

(GEN) View Poker Results:
Go to the casino, start a Poker game, hold B and press Select + Start.
Source: ReyVGM

Dragon Scroll - Yomigaerishi Maryuu

(GEN) Secret passwords (added 26.11.12):
かみなる めよりつ かわれし
ひかりの うろこも つものし
めいはた しこのち にねむる
-"Konami Shibun" a newspaper with some news about a "Chrome Dragon" (translated as "A message about divine shiny scales sleeping in the Tashiko lands").
こなみあ かまつみ しなまつ
おかいわ さやまし たすらた
かわにし こいけき のした
-Maximum exp, all items and weapons, last level access before last boss, invulnerability (translated as "Kamatsu Mishina, Matsuo Kaiwasa, Yamasita Suratawa, Nishiko Ikeki from Konami").

(UNI) A god's Narime promise (added 26.11.12):
After completing the game, people on the screen will throw a coffin and message "THE END" will slide right. After that, some people will start walking through the screen again. While they are walking, press Up + A + B on controller 2. A screen called "A GOD'S NARIME PROMISE" will appear. Here is some other cheats are available:
Press Down + A + B on controller 1-Return to the ending sequence with walking men and coffin, but this time all this will happen on the same "Narime" screen. You can return back to the normal "Narime" screen again with the same cheat as you did it before.
Press A + B + Select on controller 1-A message "あいことばは。。。。 ひみつが あるかも" will appear. From now, press A to return to the ending sequence starting from the dragon scene.
Press A 3 times, B 9 times, A 6 times and B 9 times on controller 1-A bottom message will disappear, now press A + Select. A message "きみの しあわせを しんじて" will appear. Press Select then message "ぼくは きみのますから さります" will appear. Finally, press Select to the final message "しあわせに まこ、、のぶちゃんより" and program will locked. You can't do anything any more here.

Dragon Slayer 4 - Drasle Family, Legacy of the Wizard

(FIX) Cheat mode:
All pressed buttons from both controllers in this game are combining to the one common button code, so it's doesn't matter which controller do you use. For example, the button A pressed on controller 1 is the same as being pressed on controller 2. This means that any button code combination can be pressed in many different ways, also it means, that you can press combinations, impossible to a single regular controller, like Left + Right combination. So, to enable cheat mode you must press Up + Down + Left + Right + A + B + Select at the title screen, combining the buttons from both controllers as you wish, then press Start. A sound will confirm correct code entry. Start a new game, then choose Raos (the boy on the left). Go to the store, stand before the Crystal and press A. You'll get a free Armour. Go back to the house and choose Raos again, but this time, wear the armour you just got for free. Leave the house and deplete your magic points completely. A sound will be heard again. Go back into the house, place the cursor on the grandfather painting on the wall and at the same time hold Left + Right + B also combining a buttons from two controllers as you wish, the cursor should stay in place. While holding, press A. If done right, a sound should be heard for the third time. Now you'll have max items and if you die, you'll come back to life, but maximum 4 times.

(UNI) Ending sequence (added 10.02.13):
To trigger this cheat you need a 4-player adaptor. With the same method as for previous cheat, you must press the button combination Left + Right + A at the title screen, but using the controllers 3 and 4. If done right, the title screen music will fade out and the staff roll begins.

Dragon Spirit - Aratanaru Densetsu, Dragon Spirit - The New Legend

All versions:

(GEN) Sound test:
Hold Up + A + B on controller 2 and press Reset. Use controller 1 to select various game sounds.

(FIX) Level select (added 02.01.08):
Enter "Sound test" cheat. Then, press Up, Up, B, Down, Down, B on controller 2. Use controller 2 to select a new starting level.

(FIX) Extra 20 dragons (added 02.01.08):
Skip first training game level. After some plot animation, when you return to the title screen with one of three dragons obtained, according to results of the first training stage, hold A + B on controller 2 then press Start on controller 1 to start a new game with extra 20 dragons.

Japanese version:

(GEN) Easter Egg (added 28.01.13):
Press Select 20 times at the good ending scene where Iris is riding on top of the Dragon's head to lift her skirt up.
Source: ReyVGM

Dragon's Lair

(GEN) Secret words:
Enter as player name for the hi-score table:
BATS-Thirty lives

Dragon, The

(UNI) Easter egg:
At the title screen, press Up, Down, A, B, Left, Right, B, A.

Dream Master

(UNI) Global skip (added 17.02.13):
Press A + B on controller 2 during the game to skip current cut scene or any other game's mode with no player involved. With this code, you can skip from the title screen just to the first dream intro and next to the game itself.

(BUR) GameGenie (added 17.02.13):
EAEGAAAE-Re-enables the global in-game pause. Hold Start to hold the game.
PAEGAAAA-Re-enables the global in-game debug. A couple of features now available.
Hold Start while walking to move through the obstacles and avoid the random encounters. But you still can enter the doors and climb on to ladders.
When starting a new game, enter any Prince name, then enter any 4-letter name of the Princess, but instead of pressing Start or selecthing the "END" option, press 5 times on any letter from 1 to 8 to start with the corresponding level including the Ending sequence.
During battle hold Select before attacking the enemy to deal 999 damage at once.
Press Start during cutscene to skip it.
GAEAIZEY-Re-enables the hidden unused main menu option with generic text entry screen with 8-letter string to enter. To enter it, select the "MESSAGE SPEED" from the main menu and press A or Start. It seems that this screen was used previously for the quick level access. To select a stage, you must enter correct sequence from the desired amount of letters. There are total 8 letters can be used: ユヒテラテホリス. The internal counter will be 3 if you enter only first three symbols, or 8 if you enter them all. Anyway, it seems that this option doesn't work properly now and leads to the same place with same glitches.

Dreamworld Pogie (Codemasters, Prototype)

(GEN) Suicide (added 24.09.14):
During the game, press Select.

(GEN) Soft reset (added 24.09.14):
During the game, press Select + Start.

(GEN) Free walk (added 24.09.14):
Press A + B on controller 2 during the game to skip current cut scene or any other game's mode with no player involved. With this code, you can skip from the title screen just to the first dream intro and next to the game itself.

(UNI) Extra 40 lives (added 24.09.14):
At the title screen, hold A, then press Start.

Drop Zone

(UNI) Secret words (added 25.06.09):
To enter any player names at the hi-score table you must get at least 10000 pts. After entering any name from the list below, wait for the hi-score table appears and press Up, Right, Down, Left on controller 1. A small green enemy will appears left to the hi-score table as animated cursor. You can switch with the Up or Down the cursor position and select one of the secret names entered before to select corresponding game effect, one effect at once. To play with this effects, press Select. Pressing Start will reset current cheat state.
ZOQ-Does nothing (threated as a secret name!)
NOJ-Does nothing (threated as a secret name!)
RRP-Doubles the cloak time
CZN-Start from WAVE 5
FHO-Start from WAVE 10
INR-Prevent explosion when volcano particles or NMEYE enemy collision detects
KEN-Faster moving acceleration
LOB-Slower moving acceleration
BAZ-Higher gravity
WOW-Start from WAVE 75
MPS-Glamour game mode
HDB-Cancel cheat mode, set all names as "JNR" and all scores to 100

Duck Tales, Wanpaku Duck Yume Bouken

(UNI) Avoid falling from upper stages (added 29.03.14):
During the game, only bottom levels of the stage are deadly if you fall into the holes. When falling from the upper levels, you just moving to the lower ones. To avoid falling from the upper levels and loop back from the top of the screen, hold Up on controller 2 while falling.

Duck Tales 2

(BUR) Debug leftovers (added 29.03.14):
The RAM variable $D8 stands for the debug flag. Set it to the any non zero value to enable a couple of debug features: infinite HP, hold game any time by press Select on controller 1 or during the game press A or B on controller 2 to skip to the next or the previous level accordingly.

Dungeon & Magic - Swords of Element

(UNI) Extra 18 HP and 2nd level (added 04.01.08):
At the first scene of the opening sequence (threes) wait for text starts displaying then press A, A, A, A, A, A, A on controller 2 before text stop. You can wait for the next opening sequence scenes to enter other cheats, but can press Start on controller 1 and begin a new game.

(GEN) Extra 100 gold:
At the second scene of the opening sequence (village) before text starts displaying press A, A on controller 2. You can wait for the next opening sequence scenes to enter other cheats, but can press Start on controller 1 and begin a new game.

(UNI) Hidden level map (added 04.01.08):
At the third scene of the opening sequence (eye) before text starts displaying press A, A, A on controller 2. Then press Start on controller 1 and begin a new game. During the game you can press Up on controller 2 to view current level map.

(BUR) Ending sequence (added 04.01.08):
At the opening sequence press Left + Right on controller 2. Normally this is impossible and need modified controller.

Dusty Diamond's All-Star Softball, Softball Tengoku

(FIX) See the whole field (added 24.12.13):
At the title screen, on controller 2, hold Up and press A 6 times. Then hold Down and press B 4 times. Then on controller 1, press Select to enable cheat and then begin the game. While playing, anytime the field is in view, hold Start and use D-Pad to move the camera anywhere you want.
Source: ReyVGM

(UNI) Credits screen (added 21.01.15):
Beat the game, any time during final animation, on controller 2 hold Up, press A 3 times. Then hold Down and press B 6 times. Then press Select on controller 1.

Dynamite Bowl

(UNI) Ending sequence (added 23.07.13):
Hold Select on controller 1 just before the reset the console or before the title menu appears. Now at the title menu press A to increase internal counter to 1, press B to increase internal counter to 10. You need a number 31, so you can just press A 31 times, or B three times, then A one more time, or any other available sums. Press Start at the title screen to view the ending sequence.

(BUR) GameGenie (added 23.07.13):
GAOOVXGK-Switches the game into the strange kind of edit mode. You can move any of the ninepins on any position on the lane, and set any animation frame to it. You can't exit this mode or do something with resulting game field.

Dynowarz - Destruction of Spondylus

(FIX) Secret passwords:
0916-Level select
By pressing Up level increased, by pressing Down decreased.
For Level 2 press 5 times, 3 -> 9, 4 -> 13, 5 -> 17, 6 -> 21, 7 -> 29, values between means sublevels.
1965-Sound test
By pressing B selecting song, by pressing A play song.
7777-Enemy Viewer
Press Up or Down and you'll see the enemy on the right side of the title screen change. Press Start again to return to the title screen.
8708-Weapon select.
Additionally, in Man-Mode, pause the game and press Up for "Gun 1", press Up, Up for "Gun 2", in Dino-Mode, pause the game and press Down to select a weapon.
9425-Ending

Earth Worm Jim 2 (Shin-Shin)

Single game version:

(UNI) Easter egg 1:
Press Down, Down, Right, Left, Left, Up, Right, Left, Down, Right at the title screen.

(UNI) Easter egg 2 (added 13.01.10):
Press Up, Down, Left, Left, Left, Right, Up, Right, Left, Down at the title screen.
Source: Yakovlev Victor

2-in-1 game version Part 2:

(UNI) Secret passwords:
XFILE-Easter Egg

2-in-1 game version Part 4:

(UNI) Secret passwords:
NBA96-Easter Egg

Earth Worm Jim 2 (Super Game)

(UNI) Debug feature (added 25.01.10):
Pause the game then press A + B to enable cheat mode, then press Up, Left, Down, Right, A, A, B, character will disappear and you will be able to scroll any place of level. To put character back, press Start.
Source: Yakovlev Victor

Earth Worm Jim 3

(UNI) Easter egg:
Press Up, Up, Up, Down, Down, Down, Left, Right at the title screen.

Eggland - Meikyuu no Fukkatsu

(GEN) Secret passwords (added 24.12.13):
きいそうさすきなとこいくきのうみせなさい-Stage select. During the game, press B to see the map of the levels, hold Select then use the D-Pad buttons to navigate, press B to move to the selected level.
かなさしはにはたしてせいさつにつかもつた-Final battle.

Egypt

(GEN) Alternative credits:
To see an alternative credits screen, hold Up + A + B right before the credits roll.
Source: ReyVGM

(UNI) Super free play mode:
Choose "edit" mode at the title menu. Move cursor up (do not move it left or right!) and point it to the area right above the edit menu window frame, just between two first horizontal background lines, then press A. Message "super free play mode on" will appear. Now choose "free play" mode and you'll be able to select any level.

(GEN) Sound and CHR test:
Hold Right + B then press Reset. This cheat will be revealed after beating the game on the Normal difficulty.

(BUR) Hidden text (added 25.12.13):
There is hidden copyright message inside ROM:
1991 BY S.NEZU
used to determine was the game hard or soft reset.

(UNI) Password generator (added 25.12.13):
Level:
Difficulty:
Magic:
Rooms:
Password:


Eliminator Boat Duel

(UNI) Stage select (added 23.07.13):
At the title screen, hold Up + B on controller 1, then press Start. While the opponent's speech screen is displayed, hold Left and press Select on controller 1 to switch to another opponent, hold Right and press Select to instantly win the current match.

Elite

(BUR) Hidden text (added 07.07.09):
There is hidden copyright message inside ROM:
<2.8>  NES ELITE IMAGE 2.8  -   04 MAR 1992  (C) D.Braben & I.Bell 1991/92


(UNI) SRAM clear (added 30.03.14):
Hold Up + Left + B + Select on controller 1, then press Reset and wait before the title screen appears. This will write some garbage to the SRAM and force the check routine to rewrite it and restore.

(UNI) Credits (added 30.03.14):
At the demo screen with the rotating objects, hold A + B + Select + Start, then release all the buttons at once. Instead of initial "Practice combat sequence" text you'll see a Credits roll.

(FIX) Secret words (added 27.07.13):
Enter one of the following words as a player name for corresponding language to get 10000 credits. This can be done once and you cannot change the name anymore.
CHEATER-For the English Language
BETRUG -For the German Language
TRICHER-For the France Language

Elysion

(UNI) Secret passwords (added 27.07.13):
Enter one of the following password to enable the location warp for the corresponding class, along with higher specs/experience, etc. During the game press Start to warp to the next key location (just like in Crystalis/God Slayer). At some points in the game you can switch current class and continue to warp to the corresponding locations, which is different for every class. There is no indication, where it can be enabled, depending on the story itself, but if you at the such point, press A 5 times, then press Select to cycle between 4 possible ways to continue, then press Start to warp to selected story line.
たいりよ くいちば んみのすくん-Minos class.
せいせき ゆうしゆ うあいれ ちやん-Aylex class.
おによが はやいぞ でおねあ ちやん-Dionea class.
みりよく さいこう びすかむ くん-Viskam class.
くかいら いんじい ていえす-Minos class, ultimate specs/experience, etc.

Emoyan no 10 Bai Pro Yakyuu

(UNI) Auto infield play (added 31.03.14):
Hold B on controller 1 and press Reset. During the game, when in the infield closeup mode, the catcher will always throw the ball immediately to the base, instead of waiting for player input. As well as runner will always run automatically to the next base, according to the situation.

Erika to Satoru no Yume Bouken

(GEN) Secret message:
Beat the game. The last screen on the ending is a photo of the characters with the word おしまい (END).
Let the screen sit for 18 minutes. The photo goes black-and-white.
Let the screen sit for 18 more minutes. The photo goes sepia-tone.
Wait 55 minutes. When the music stops suddenly, press Left + A + B + Select + Start on controller 1, and Right + A + B on controller 2. A new music will start.
Press Right + B + Select on controller 1, and Down + Right + B on controller 2. Hidemushi's message will start.
Once Hidemushi's message stops, press Up + A + B on controller 1 for his last message.
Wait 18 more minutes, and the game goes back to the title screen.

(GEN) Secret passwords (added 31.03.14):
みのりくみこきよはる-Secret message 1
おみやきていしよくさ-Secret message 2
ままかいしやこわいよ-Secret message 3
こいするおおまちくん-Secret message 4
Source: tcrf.net

Erunaaku no Zaihou

(UNI) Starting point warp (added 31.03.14):
During the game, hold Down + A + B on controller 2, then prees A on controller 1 to immediately return back to the starting point of the level.

Escape From Atlantis

Prototype 1 version:

(UNI) Level skip (added 31.03.14):
Any time during the game, press Select + Start on controller 2 to skip current level. This cheat was removed from next Prototype version.

Esper Dream 2 - Aratanaru Tatakai

(UNI) Secret words (added 18.10.07):
Enter one of following words as a player name, then hold on controller 2 corresponding button combination and press Start, release the controller 2 buttons when the next screen appears. Both words has the same effect, gives you extra 255 gold.
こや 2-Hold Up + Left on controller 2
あ0き -Hold Up + Right on controller 2

Exciting Boxing

(UNI) Secret masked opponent (added 23.07.13):
After you beat all 7 opponents and the "END" screen is displaying, hold Up + A on controller 2, then press any button on controller 1. Instead of regular title screen, you'll get to the secret opponent challenge request. Press Start then select the "VS MODE" to play it. You also can obtain the password with this secret opponent.

Exodus

(GEN) Level select:
At the stage number screen, press A or B to increase or decrease starting level number by 5, up to 81.

(GEN) Suicide:
During the game, press Select + Start to commit suicide.

(BUR) GameGenie (added 01.04.14):
SXOOLNNY-Engine of this game based on the "Crystal Mines" game engine, so this game have the same Level Select routines, but haven't any cheat codes to enable it. With this GG code you can change the level number with A or B by 1, instead of 5, up to 100. Press Select to enable powerful weapon, press Start to increase lives number. The harder mode flag still exists, but not used.

F-1 Sensation, Formula 1 Sensation

(UNI) Empty cheat 1 (added 29.06.09):
At the title screen, press Up, Up, Down, Down, Left, Right, Left, Right, B, A (also can be entered on pause during the game), a sound will confirm correct code entry. Cheat does nothing. Probably there was some other cheat at the development stage.

(UNI) Empty cheat 2 (added 29.06.09):
At the title screen, press B, A, B, A (also can be entered on pause during the game), a sound will confirm correct code entry. Cheat does nothing. Probably there was some other cheat at the development stage.

(UNI) Cheat mode (added 29.06.09):
Press A, B, A, A, A, B, A, A at the title screen (also can be entered on pause during the game), a sound will confirm correct code entry. Effect identical to "ED.ED" secret word effect except it can be used in "FREE MODE".

(UNI) Speed boost (added 26.12.13):
During race, pause the game, hold Up + A and then press Start to unpause. The speed of the car will be temporarily boosted to it's maximum, even if you were standing. Speed will return to it's normal value or to 0 if you don't accelerate.

(UNI) Add lap time (added 26.12.13):
During race, pause the game, hold B + Select and press A to increase the internal lap timeout timer. If this timer is dropped down to 0, then you'll get retired from the current race. With this cheat you can increase this timeout counter up to maximum as much as you need and stay on the race for a long time you need.

(UNI) Secret words (added 24.11.08):
Enter one of following words as a player name in the "GRAN PRIX" mode. When name is entered right a sound "GO!" will confirm correct name entry.
KONAMI-Does nothing
MOAI-Does nothing
BEST-Does nothing
ED.ED-Unlimited tires and more cheat features.

F-117A Stealth Fighter

(FIX) Secret passwords:
Select "saved..." game mode, enter the player name, then enter:
4093CB1#-Now you can select any mission in "Theater" menu and invulnerability will be enabled.
#1BC3904-Message "USAF regulations do not permit save codes taken from game manuals.".

(BUR) Abuse filter (added 04.01.08):
No one following player's names you could enter: "ASS", "CLIT", "COCK", "CUNT", "DAMN", "DICKHEAD", "DILDO", "FUCK", "HELL", "PISS", "SHIT", "TIT", "BEATOFF", "BITCH", "BLOWJOB", "FART", "HARDON", "JACKOFF", "JERKOFF", "NIGGER", "PECKER", "PENIS", "PRICK", "PUSSY", "SCHLONG", "SLUT", "SNATCH", "SPIC", "TWAT", "VAGINA", "WHORE", "HARDON", "CUM", "BASTARD", "BLOW".

F-15 City War

All versions:

(BUR) Hidden text (added 07.07.09):
There is hidden copyright text in ROM:
DESIGN BY K.T.JEAN COPYRIGHT RESERVE


(UNI) Extra 30 lives (added 01.04.14):
At the game start of after the game over screen, at the tile menu, press Select 20 times, cursor should stop at the "CONTINUE" option, then press Start to continue the game with 30 lives. This only works if you continue from the first two levels.

REV 1.x version:

(UNI) Stage select (added 01.04.14):
At the tile menu, press Select 10 times, cursor should stop at the "CONTINUE" option, press A to switch between 1, 3 and 5 levels (press A to play the same sound as Select now), press Start to play from selected level.

F-15 Strike Eagle

(BUR) Abuse filter:
Nothing of the following player's names you could enter: "COCKSUCK", "ASSHOLE", "TIT", "PRICK", "PUSSY", "SNATCH", "JACKOFF", "BITCH", "PENIS", "TWAT", "SLUT", "BLOWJOB", "BEATOFF", "CLIT", "SPIC", "WHORE", "VAGINA", "DICKHEAD", "FART", "PECKER", "SCHLONG", "ASS", "DILDO", "COCK", "SHIT", "PISS", "FUCK", "CUNT".

F1 Circus

(UNI) Ending sequence:
Hold Up + A + B + Select + Start on controller 1 and press Reset.

(UNI) SRAM clear:
Hold A + B on controller 2 and press Reset.

(UNI) Skip current race (added 01.04.14):
During the game press Down + Select on controller 1. This ends the current race with worst results. Additionally to these buttons, hold A + B on controller 2 during qualify race to complete it with the best result ever: 00:00:00. But you can't get the best result during regular championship race, anyway.

(UNI) Machine select (added 01.04.14):
During World Championship, highlight the "LAP" menu option, hold Up + A on controller 2, then press A on controller 1 to select the Machine, which is not available during normal game.

(UNI) Course select (added 01.04.14):
During World Championship, highlight the "LAP" menu option, hold Right + B on controller 2, then press A on controller 1 to select the Course, which is not available during normal game.

Famicom Disk System BIOS

(UNI) Self test (added 02.11.08):
Hold Select + Start then press Reset. Messages "PRAM CRAM" and "PORT" will appears. If internal RAM test fails, instead "OK" will be displayed first bad RAM address.

(UNI) Secret message (added 02.11.08):
Hold Select + Start, press Reset, then in next two seconds release Select + Start and hold Right + A. Message "2C33 INTERNAL ROM PROGRAMED BY TAKAO SAWANO NINTENDO CO.,LTD. DEV.NO.2" will appears.

FamicomBox

(UNI) Easter egg (added 07.04.12):
Turn key on the FamicomBox front panel all the way to the left. When "GAME TITLE & COUNT DISP." screen displayed, press Up, Down, Left, Right, A, B, Select, Start on controller 1. The screen will scroll up, instead of menu "NINTENDO ENTERTAINMENT SYSTEM (FAMICOMBOX) DEVELOPMENT..STAFF" screen will appear. Now, press Select to cycle through the staff members.

(BUR) Hidden text (added 07.04.12):
There is hidden copyright and build dates text inside the ROM:
THIS PROGRAM IS MADE BY TOSHIO SENGOKU.  MAKE START 1986/08/27 - MAKE END 1986/09/10.


Famicom Jump - Eiyuu Retsuden

(BUR) GameGenie (added 10.12.10):
PENNOYAA-Re-enables the in-game debug mode. While on world map or in towns you can press on controller 2 A to refill HP, press B to add 65535 money, Right or Down to other effects.
PEXPVYAA-Re-enables debugging feature for the small event screens, like Game Over screen or Teleport Display. Press Select to switch to the next event while any of it is displayed. Be careful, it's just increasing the internal counter and doesn't check it for validity or wrap around 0, there is a total 7 events and after 8th you'll crash the game. Note: the Game Over event number - 6, events 2 and 4 are unused and 4th one has a nudity.
PEVAIPAA-Similar to the previous debug feature for mini-games. Press on controller 2 A to win current game, B to exit from it, press Select on controller 2 to switch to the next nimigame. This time there is a value check, so you couldn't crash the game with it.
PAOEZZAA-Different debug routine for the last mini-game battle. Press A or B on controller 2 to refill HP/MP ore press Select on controller 1 to win current battle.

Famicom Jump II - Saikyou no 7 Nin

(UNI) SRAM test (added 03.04.14):
When no save data is present (first boot or battery was removed or saves are damaged), hold Left + A + B on controller 2 then press Reset. This will init the whole SRAM with particular byte pattern. The screen will turn green and game stops. Now, hold only A + B on controller 2 and press Reset again. The game will test for the particular pattern presence, if test is ok, the game will reinit it's SRAM and continue normal play. If not, the screen will turn red and game stops. With this feature, you can test as well SRAM integrity or how is battery keeps save data, if you remove the cart between two mentioned above operations.

(BUR) GameGenie (added 03.04.14):
AAEGAENY-Re-enables a simple debug features. First of all, this disables the random encounters on the world map. Hold A on controller 2 while walking to move faster. Also hold B on controller 1 while walking to free move on any map in any direction, anyway doors are still working.

Famicom Meijin Sen

All versions:

(UNI) SRAM clear (added 03.04.14):
Hold A + B on controller 1 and controller 2 at the same time, then press Reset.

(BUR) GameGenie (added 30.06.09):
GEOKYAAX-Engine test mode. Reset the game, then you can scroll background in any direction with controller 1, move test sprites and write sting "TEST123456789TEST" to the background with the controller 2 buttons. Use A and B on controller 1 to play some test sounds.

REV0 version:

(BUR) GameGenie (added 30.06.09):
AANGIAAE-Powerful CHR data viewer. Just reset the game.
GANGIAAA-Powerful memory editor/viewer enabled. Just reset the game.

Famicom Shougi - Ryuuousen

(GEN) Save and Load menu:
Select first or second game modes at the title menu, then press B + Start on controller 1 to enter the Save/Load menu.

Famicom Top Management

(GEN) Sound test:
At the title screen, press A + B.
Source: ReyVGM

Famicom Wars

(UNI) SRAM clear (added 23.07.13):
At the main game menu, before the game starts, hold A + B both on controller 1 and controller 2 at the same time, then press Start on controller 1.

Family BASIC, Playbox BASIC

(GEN) Secret words:
Enter following commands to see a hidden built-in games.
GAME 1-Unfinished game 1
GAME 2-Unfinished game 2
GAME 2,1-Complete finished game 1 + 2 Mario type
GAME 3-Complete finished game Shooter type

Family Boxing, Ring King

(UNI) Super power (added 06.07.09):
At the gym screen, where you can set up your parameters before the fight. Enter the following button sequence: A on controller 2, A, Select, A on controller 1, B on controller 2, Select on controller 1, A, B on controller 2, B, B on controller 1. From now, your punch power will be at the maximum and enemy's punches won't damage you. But you couldn't save your progress with the passwords. A password string will be always "ANTAWOTUYOI", which means "YOU ARE STRONG".

Family Circuit

(FIX) Sprint race skip (added 05.04.14):
Due to specific of the program design, there is possible to abuse some features to easily win the Sprint Race mode. Start a new Sprint Race mode (third option), enter a name and select a car with the password, then select game type (the last one "SUPER A" will give you the real ending). During normal game, every course consist of two parts, two qualify and one sprint race. You can retire from any course by press Select, but you get no points and will be last in the list. Now, just before the start of every sprint race part (results of the qualify part doesn't matter, so you can skip it), try to press A + Select at the same time, so you start a new race and immediately retire from it. If done right, the game won't init the racers list, but skip immediately to the result calculation, using the empty tables. This will turn all cars into default ones called "RALLY-X", all racers are retired now, as well as you. But points calculation and sorting routine will place YOU to the top of the ranking list! If you continue this operations for every course, you win! The same bug can be done with the "Taikyuu" race, but in this mode, there should be at least one winner. If all cars are retired, the race is over, so you just can't abuse this trick here.
Source: ReyVGM

(UNI) Extra acceleration (added 03.04.14):
Normally, during the game, if you press B, your car will brake. But, if you hold A at the title screen and press Start, the brake button will turn into acceleration button. So, pushing B during race will twice the acceleration speed as well the speed itself. There is other method for enable this cheat, seems its just a bug. If you start a new "Kansen" mode race, the acceleration button will be enabled too. You just need to skip the race by pressing Select to return back to the title menu. This cheat also disables the random opponent car selection in the Sprint Race or Taikyuu Race modes. You will always race with the first 8 cars from the predefined cars list.

(BUR) Hidden text (added 29.12.08):
There is some copyright text inside ROM:
COPY RIGHT
   1987
   GAME
  STUDIO
  END
  HAZ


Family Circuit '91

(UNI) Retire from race (added 03.04.14):
During the game in any game mode, press Select + Start to retire from the current race.

(UNI) Clear Sprint Race memory bank (added 03.04.14):
While selecting the memory bank in the "SPRINT RACE" game mode, hold Select on controller 1, then press B to erase selected memory bank.

(UNI) Clear Time Attack record (added 03.04.14):
Enter the "TIME ATTACK" mode, select a course. Now at the Record Data and Settings screen hold Select on controller 1 and press B to clear current record.

(UNI) Special practice courses (added 03.04.14):
Enter the "COURSE SELECT" in either the "FREE PRACTICE" or "TIME ATTACK" game modes. Highlight either the "LONG RUN" or "FRANCE" courses, hold Select on controller 1, then press A. This will gives to you two extra hidden courses.

(UNI) Special endurance course (added 03.04.14):
Enter the "ENDURANCE RACE" mode. Highlight the "LONG RUN 50" course, hold Select on controller 1, then press A. This will gives to you an extra hidden course "OLD LONG RUN".

(BUR) Hidden text (added 03.07.09):
The RESET routine in this game uses string
KNIGHT
to check if game was soft or hard reset.

(BUR) GameGenie (added 05.02.13):
GAXTNAEI-Some of the Namco games, which uses the 19 mapper PCB, contains also the specific self-test routine. It can test and initialize the internal RAM buffers. Similar to the other Namco games series, in order to run these tests, you must plug in a special device to the famicom expansion port. This device is much simpler than mentioned another device. It just takes one bit of data and immediately returns it inverted to the data port, there is no FIFOs inside. When the program detects the device presence, it performs RAM test and initialization. If RAM is already tested/initialized, the screen will turn blue. If RAM isn't initialized, but after init and test all is fine, then screen will turn yellow or pink. If, even after the reinitialization, RAM test fails, then screen will turn red. After the tests, program goes to the infinite loop, so yo must unplug special device to boot into the game. Using this Game Genie code you can skip the special device check and just directly to the RAM initialization routine. This game tests it's WRAM at $7800.

Family Computer - Othello, Othello

(UNI) Edit mode (added 05.01.08):
At the time limit select menu for any mode, except "SLOT", press Right + A on controller 2 and A + B + Select on controller 1 at the same time and hold all buttons until the name entry screen appears. Before the game start, you will be able to put black or white stones on the table by pressing A or B, then press Start to finally start a new game with given field configuration. To edit field configuration in the "SLOT" mode, hold the same button combination at the mode selection screen. Unfortunately, you couldn't see the ending credits if using this cheat on any difficult level.

(FIX) Slot mode (added 07.04.14):
At the mode selection menu, hold Select and press A or Start to enable the slot mode game type 1 or press B to enable the slot mode game type 2. The mode name will change to "SLOT". The slot mode will force 2 player game. Here you will play the regular Othello game, but both players can only put the stones at the random locations, instead of the selected ones. In the game type 1, the location is selected with the random dice roll. Press B twice to stop two dices and put a stone. In the game type 2, press B while a star cursor is jumping randomly on the field to put the stone at the place where the star were located at that moment.
This cheat remains in the US version, but actually does nothing, except changing the mode name to "SLOT", forcing 2 player game, and selecting the stone pickup method in "SLOT GAME", descibed below.

(UNI) Slot game (added 07.04.14):
In addition to the main "SLOT" mode, there is other "SLOT GAME" mode can be enabled. When 2 player game is over and message "GAME END" is displayed, hold Select on controller 1, the press A on any controller. The player who pressed A, when in "SLOT" mode type 1 or regular 2 player game, will be asked to roll the dices then pick up a color. When in "SLOT" mode type 2, a random star will be jumping over the field, press B to stop it, then pickup a color. A stone of the selected color will be placed on the field in given position. Other player should do the same next. This may change the game results by luck.

(UNI) Hidden staff screen (added 07.04.14):
There are two endings in this game, the first one you get when beat the Level 4 computer, the second one you gen when beat the Level 5 computer in a special game after that. The Staff screen is displayed always in the second ending, but if you hold B on controller 1 during the first ending, you can see the same Staff screen as well.

(BUR) Hidden text (added 07.04.14):
There is a hidden developer message present inside the ROM:
PROGRAMMED BY HAL LABORATORY


Family Jockey

(BUR) Hidden text (added 23.06.09):
The game contains some generic NAMCO hidden copyright text:
COPYRIGHT 1986 NAMCO LTD.ALL RIGHTS RESEEVEDPROGRAMED BY T.FUKUMOTO
Also at the end of the file there is some other text:
HARUHISA.UDAGAWA  & KUMI.HANAOKA
This text is a part of a hidden CRC test routine and used in some other games programmed by the same people.

(BUR) GameGenie (added 23.06.09):
GANNVTEI-There are a series of the Namco games, made by the same programmers Haruhisa Udagawa and Kumi Hanaoka, that contains the same self-test for the data integrity. To enable any of these tests you need a special device that should be plugged into the expansion port. The operation of that device is very simple. It should accept the data bit from the data input port and return it back inverted to the output data port. The device consists of 4-bit shift register, working as some sort of the FIFO buffer. The input bits are goes to the input and then shifted to the output after a 4 cycles. At the game's boot, it tries to send some special data to the device. If the data output doesn't match the data input inverted, then the game continues the normal operation. But if all data (usually 32, rarely 64 bytes) is matches, self-tests will be performed. The program calculates 24-bit partial checksums for the PRG (excluding the last 8K) and the CHR data, summing only every 15th byte, and comparing it against the etalon. Before testing of the PRG data, the background color turns red, before testing of the CHR data, it turns green. If any of these tests are failed, the program will jump directly to the reset routine. It means, one of these tests will be performed infinitely, but until the special device is plugged in, or until the test are passed. Normally, you'll see the red to green flash just before the game's boot. Or the static red screen if the PRG data is bad, or the flashing red to green screen if CHR data isn't good. Using this Game Genie code you can skip tests for the special device presence and jump straight to the integrity tests.

Family Mahjong II - Shanghai heno Michi

(UNI) Luck control (added 09.04.14):
In the Mahjong Grand Prix mode, the program does some additinal luck manipulation. Although the tiles are shuffled once before the match, sometimes, the game can look for the tile, that can help you to complete the mahjong, and swap it with the topmost tile in the stack, which should be tossed to the player in the next round. It depends on the player's stats (mahjong power, luck and stamina), which determines how many tiles in the nearest stack will be checked for the tile you need. If sum of your stats is greather than 200, then no tiles will be checked, if sum is between 150 and 200, then first 10 tiles will be checked, first 7 tiles will be ckecked if sum is between 100 and 150, and finally only first 4 tiles will be checked if sum less than 100. Obviously, if there are no useful tiles in the nearest stack, you'll just get the next random tile from the stack. This also does mean, that you just obtain the tile you need much earlier, but all the tiles you don't need will be given to you later anyway.
Normally, you can only control the depth of mentioned search by keeping the player's parameters in the proper range. This gives you a little more luck during the game. But you can obtain the useful tile only when the programm picks one of your tiles in hand to check if any other useful tiles in the stack, this means a random value in range from 0 to 255 should be less than 13. However, you can increase it's probability slightly, by using the buttons on controller 2. Every button stands for a number: A - 1, B - 2, Select - 4, Start - 8, Up - 16, Down - 32, Left - 64, Right - 128. When you hold a button combination, the numbers are summing, and resulting value is using as the divider for the random generator. The resulting random number calculated as remainder of division. For example, hold A on controller 2 during the game, and all random numbers will be divided by 1. Remainder of this operation is always 0, so, the game will look for the tile that exactly or less by 1 than leftmost player's tile in the hand. Or, hold A + Select + Start on controller 2, to divide the random number by 13. In this case, it will always look into the player's hand and pick up any of it's 13 tiles to look for in the stack, resulting in higher probability.

(BUR) GameGenie (added 23.06.09):
GEEZAEGK-Re-enables the face debug routine. Just start a new game with opponent selection screen, you cannot play this mode, but can switch all faces with A or B on controller 1.

(BUR) Hidden text (added 09.04.14):
The RESET procedure in this game uses the string
@1988 Nichibutsu
to determine if game was hard or soft reset.

Family Pinball, Rock 'n' Ball

(FIX) Skills select (added 10.04.14):
Any time after the game boot up, but before the first demo sequence at the title screen, enter one of the following codes on controller 2, then start a new game to enable corresponding effect. All these codes are unlockables in the Gambling mode. When you win one of the picked skills, the game will display the corresponding cheat sequence to enter on the title screen, except the last one.
B, Left, Right, A, Up, Down-Extra 10 balls in the Gambling mode.
Up, A, Right, B, Down, Left-Player 1 controls both flippers in the Battle mode.
Left, Right, A, Down, B, Up-Extra 5 balls in the Piball mode.
Down, B, Left, Right, Up, A-Flippers with highest rebound in all modes except the Sports mode, and for all players.
Right, Up, B, Left, A, Down-Pair A. During the game in the Pinball mode, controller 1 will control the bottom flipper and controller 2 will control the top flipper.
A, Down, Up, Right, Left, B-Pair B. During the game in the Pinball mode, controller 1 will control the right flipper and controller 2 will control the left flipper.
B, A, Down, Up, Left, Right-Unused cheat. Working, but does nothing.

(BUR) GameGenie (added 10.04.14):
IVOXPASE (for the US version)-Only the US version of this game contains this mode, where you can not only enter your name, also the age, phone number and even the home address, and the program should generate some password for you. It seems, that western copy was intended to be used in some competition, like "Treasure Master", but cancelled and left unfinished. The code re-enables the name entry screen after the end of the Pinball mode.

Family Quiz

(BUR) Hidden text (added 07.07.09):
There is hidden copyright text in ROM:
=====STAFF======
---[produce ]---
      S.N
---[picture ]---
      M.E
----[music ]----
      S.S
-----[quiz]-----
      Y.I
      S.O
---[program ]---
      K.I
      T.O
      Z.Y


(BUR) Hidden text (added 07.07.09):
The RESET routine in this game uses string
WHALES
to check if game was soft or hard reset.

Family School

(UNI) Instant game over (added 10.04.14):
During the game press A + Select + Start on controller 1 to instantly over it and see the results. There is no exit from the results screen except reset.

Family Tennis

(BUR) Hidden text (added 08.02.13):
There are a hidden copyright messages inside the ROM:
FAMILY TENNIS 1987 NAMCO,ALL RIGHT RESERVED.
COPYRIGHT 1987 NAMCO LTD.ALL RIGHTS RESERVED


Family Trainer - Athletic World, Athletic World

Japanese version:

(UNI) Secret words (added 12.02.14):
Enter one of the following words as a player name:
はたなかまさこ!!!-This will allow you to select the stage of the game to start with, and some additional features (need to investigate), to do that you need fill the year in the date field. To select a special features, enter for the first number of the year any non-zero value. To select a stage, enter the second number of the year to any value from 0 to 4, values from 5 to 9 can be entered too, but they cause a heavy glitches to the rounds.

Family Trainer - Jogging Race

(BUR) GameGenie (added 10.04.14):
ENNSYOXT+AAEIAXXV-Re-enables the debug marathon stage select. At the title screen select the 2nd option and press A.

Famista '89 - Kaimaku Han!!

(UNI) Credits:
At the title screen hold A + B on controller 1 then press Start.

(BUR) Hidden text (added 08.02.13):
There is a hidden copyright message inside the ROM:
COPYRIGHT 1986 1989 NAMCO LTD.ALL RIGHTS RESERVED 1989.3.31 KISSIE


(BUR) GameGenie (added 10.04.14):
XTOYUZAV-Re-enables the simple memory viewer/editor. You need a 4-player adapter for the famicom, to use it. On Controller 3, press Start to hold the game, press Select to enable the memory viewer/editor, use the buttons on Controller 3 to change address and data, press Select again to disable it.

Famista '90

(GEN) Test mode:
At the title screen after "push start button" message appears hold A + B on controller 1 then press Start.

(BUR) Hidden text (added 08.02.13):
There is a hidden copyright message inside the ROM:
COPYRIGHT 1986 1989 NAMCO LTD. ALL RIGHTS RESERVED 1989.9.30 KISSIE


(BUR) GameGenie (added 05.02.13):
GEVYNPEI-Some of the Namco games, which uses the 19 mapper PCB, contains also the specific self-test routine. It can test and initialize the internal RAM buffers. Similar to the other Namco games series, in order to run these tests, you must plug in a special device to the famicom expansion port. This device is much simpler than mentioned another device. It just takes one bit of data and immediately returns it inverted to the data port, there is no FIFOs inside. When the program detects the device presence, it performs RAM test and initialization. If RAM is already tested/initialized, the screen will turn blue. If RAM isn't initialized, but after init and test all is fine, then screen will turn yellow or pink. If, even after the reinitialization, RAM test fails, then screen will turn red. After the tests, program goes to the infinite loop, so yo must unplug special device to boot into the game. Using this Game Genie code you can skip the special device check and just directly to the RAM initialization routine. This game tests it's IRAM buffer, used for the expansion sound.

Famista '91

(GEN) Test menu:
At the first title screen, before "push start button" message appears on controller 1 press B 9 times and A 1 time (in any order), then press Start.

(BUR) Hidden text (added 08.02.13):
There is a hidden copyright message inside the ROM:
COPYRIGHT 1986 1990 NAMCO LTD. ALL RIGHTS RESERVED 1990.9.10 KISSIE


Famista '92

(UNI) Soft reset:
Press Start then immediately press Select.

(UNI) Test menu:
At the title screen, press Left 9 times and Right 2 times (in any order), then press Start.

(BUR) Hidden text (added 08.02.13):
There is a hidden copyright message inside the ROM:
COPYRIGHT 1986 1991 NAMCO LTD. ALL RIGHTS RESERVED 1991.09.13 KISSIE


(BUR) GameGenie:
PEKNSTAA-Re-enables debug input routines, as well as simple test menu cheat, at the title screen hold A + B and press Start. Use Controller 3 with the 4-Player adapter to switch memory view monitor on during the game or pause it.

Famista '93

(UNI) Test menu:
At the title screen press Left 9 times and Right 3 times (in any order), then press Start.

(BUR) Hidden text (added 08.02.13):
There is a hidden copyright message inside the ROM:
COPYRIGHT 1986 1992 NAMCO LTD. ALL RIGHTS RESERVED 1992.09.18 KISSIE


(BUR) GameGenie:
PEUNVTAA-Re-enables debug input routines, as well as simple test menu cheat, at the title screen hold A + B and press Start. Use Controller 3 with the 4-Player adapter to switch memory view monitor on during the game or pause it.

Famista '94

(UNI) Test menu:
At the title screen press Left 9 times and Right 4 times (in any order), then press Start.

(BUR) Hidden text (added 08.02.13):
There is a hidden copyright message inside the ROM:
COPYRIGHT 1993 NAMCO LTD. ALL RIGHTS RESERVED 1993.08.31 KISSIE


(BUR) GameGenie:
PEKNVTAA-Re-enables debug input routines, as well as simple test menu cheat, at the title screen hold A + B and press Start. Use Controller 3 with the 4-Player adapter to switch memory view monitor on during the game or pause it.

Fantastic Adventures of Dizzy, The

All versions:

(FIX) Immune to spiders (added 03.03.16):
The game has a programming bug, which may cause the immunity to the spider enemies. Every time you take damage or lower it, the damage progress bar is filled or drained accordingly. Press Select during the progress bar animation period to show the items screen and then press Select again to return back to the game. This causes the damage change process to abort. Which means you may not only loose some life points, when refill process is interrupted, but either stop taking additional damage. But most importantly, this stops the spider enemy collision code to detect the collision with main character, rendered the Dizzy immune to spiders for some time. Untill you take another damage or restore it in the normal way. It can be done either after the fruit eaten or when spider itself is touched.
Source: gamefaqs.com

(UNI) Smiley test:
Absolutely all games by Codemasters have internal PRG ROM and CHR RAM testing routines. So called "Smiley tests". Tests are normally enabled, but for triggering it needs pressing all D-Pad buttons. Hold Up + Down + Left + Right + A + Select + Start to enter the PRG ROM test or hold Up + Down + Left + Right + B + Select + Start to enter the CHR RAM test, and press Reset. A green smile means that test passed, red sad face - failed.

Aladdin version:

(UNI) Soft reset (added 11.04.14):
During the game press A + B + Select + Start.

(UNI) Extra life (added 11.04.14):
At the intro screen after the title screen, press Left + Select.

(UNI) Minigames warp (added 11.04.14):
During the game, in the Dizzy's house, stand under the table in the middle between two cupboards. Pause the game, then hold A + B and press one of the following buttons to select corresponding mini game. Now release all the buttons, unpause the game and exit from the house. Instead of outside of the house, you'll start a selected minigame.
Up-Ride on the trucks.
Down-Shooting range in the Castle.
Left-Underwater bubbles ride.
Right-River ride.

Fantasy Zone (SunSoft)

(UNI) Sound test:
After beating that damn hard game, when the "staff" roll is about to over, press on controller 2 Left 33 times. After "staff" ends, sound test mode will appear.

Fantasy Zone (Tengen)

(UNI) Invulnerability (added 10.01.09):
In game press Select then press A, B, B, Start, Start, Start, B, B, A, Select.

(UNI) Level skip (added 10.01.09):
In game press Select then press B, A, B, A, Start, Select.

Fantasy Zone 2 - The Teardrop of Opa-Opa

(FIX) Continue (added 11.04.14):
After the game over screen, at the title screen press A, A, A, Up, Up, B, B, B, then press Start to continue from the last played level. You can do this again up to 3 times.
Source: ReyVGM

Faria - A World of Mystery and Danger!, Faria

US version:

(FIX) Secret words (added 05.01.08):
Enter one of following words as player name:
GaoGao-Begin game play with invulnerability, unlimited gold and other bonuses.
ENDING-Begin game play with all quests completed.

Japanese version:

(UNI) Secret words (added 05.01.08):
Enter one of following words as player name:
むしか-Sound test. Note: after entering three symbols, press "end" option.
つっょい-Begin game play with invulnerability, unlimited gold and other bonuses.
っりわお-Begin game play with all quests completed.

Felix the Cat (Dragon Co., TomSoft)

(BUR) Hidden text (added 04.12.08):
There is some hidden copyright text inside the ROM:
TomSoft Studio. E-mail:tomsoft@ihw.co.cn.  Tel:(029)7223482
and
tomsoft-1997


Fighting Golf, Lee Trevino's Fighting Golf

(GEN) Left-handed play:
While selecting a player, hold Left.

Fighting Hero (Unl)

(UNI) Secret moves (added 24.07.13):
At the title screen, press Up + Left + A + B on controller 1, then start a new game, and while on the stage select screen press Down + Left + B on controller 1. Now you'll be able to use three secret moves: Up + A + B - high uppercut, Left + A + B - round kick, Right + A + B - fireball.

Fighting Hero III

(UNI) Secret moves (added 24.07.13):
Start a new VS CPU game, loose 4 times. At the continue screen, when the number of continues is 6 and the countdown timer is 6 too, press Start. Now you'll be able to use three secret moves: Select - high uppercut, B + Select - round kick, A + Select - fireball.

Fighting Road

(UNI) Test mode:
Hold A + B on controller 1 then press Reset.

(UNI) Secret passwords:
TO LAST !!-Ending sequence
DEBUG*MODE-Enable in game debugging mode.
Pause the game and use following buttons to get additional effects:
A-Toggle player's invulnerability
B-Toggle enemy's invulnerability
Select-Enemy kill
Up-Restore player's health
Down-Fill power bar
Left-Restore enemy's health

(BUR) Sound mode:
Bank $0D, address $B800, old sound test routine, all function calls are wrong and moved lately to another addresses, so routine totally unfunctional, but can be repaired as soon as contains all the data strings and the code to work properly.

Final Combat

(UNI) All weapons (added 07.04.10):
At the title menu, select the "START" option and press Start, then while a sound is playing quickly hold Up + Left + A + B.

Final Fantasy

(GEN) Bonus puzzle game:
Enter the ship, hold A and press B 55 time. Arrange the tiles in order from 1 to 15 to collect 100 Gold.

(GEN) Display map:
During the game, holp B, then press Select. Instead of the Lineup edit mode, a map will appear.

Final Fantasy III

(UNI) Secret message:
Holdin Up + Left + Select + Start, power the console off, then on again, and then release Select. There is no software protection involved, just another way to hide the developer credits if the normal ones is removed.
Source: tcrf.net

Final Fantasy V (Mars)

(UNI) Easter egg (added 24.07.13):
During the game, enter the menu by pressing Select then press Left + Select + Start on controller 1. A "MARS" logo will appear at the top-left corner of the screen.

Final Fight 3

(UNI) JY company's Easter egg:
Press Down, Down, Left, Up, Right, Left, Up, Down at the title screen.

(UNI) Stage select (added 14.04.14):
During the game, press Start, then press Select. The screen will turn black. Press A or B a number of times, corresponding to the desired level. For example press A 1 time to go to the stage 1-2, press A 16 times to go to the stage 6-2. Do not press more than 16 times, this will crash the game.

Fire 'n Ice, Solomon no Kagi 2 - Coolmin Tou Kyuushutsu Sakusen, Solomon's Key 2

All versions:

(GEN) Extra levels, Sound test (added 18.12.07):
Hold Select and press B, B, B, B, B, B, B, B, B, B at the title screen. Extra 5 Worlds (50 new levels) all along with sound test options will be available.

US version:

(UNI) Password generator (added 18.12.07):
12345678910
World 1-
World 2-
World 3-
World 4-
World 5-
World 6-
World 7-
World 8-
World 9-
World 10-
Random:
Password:


Fire Emblem

(UNI) Sound test (added 10.10.08):
After saving current game, when asked, select "no continue" option to end current game. Then press Up, Down, Left, Right, Up, A.

Fire Emblem Gaiden

(GEN) Easy mode:
Hold Select + Start and select the "New Game" option. Additional menu will appears.

(UNI) Sound test:
When first messages appears on screen after powering up the NES system, press Up, Down, Left, Right, Up.

Fire Hawk

(GEN) Mission 2:
At the title screen, hold A and press Start.

(UNI) Mission 4 (added 15.04.14):
At the title screen, hold Up + Right and press Start.

(UNI) Extra life (added 15.04.14):
At the title screen, hold Left + B + Select and press Start.

(UNI) Invincibility (added 15.04.14):
At the Mission screen, hold Up + B + Select and press Start. The helicopter color will change, now you are invincible, but the fuel still may run out. You should re-enter this cheat before the every mission.

(UNI) Mission skip (added 15.04.14):
At the Mission screen, press one of the cheat sequences below, corresponding to the mission number, to skip to the next mission instantly:
Up, Right, Down, Left, Left, Left, Left, Left-Skip from Mission 1 to Mission 2
Up, Left, Down, Right, A, B, B, B-Skip from Mission 2 to Mission 3
A, B, Up, Right, Down, Left, Up, Right-Skip from Mission 3 to Mission 4
A, B, Select, A, B, Select, Select, Select-Skip from Mission 4 to Mission 5
Up, A, Down, B, Left, A, Right, B-Skip from Mission 5 to Mission 6
Left, B, A, Up, Right, Down, B, A-Skip from Mission 6 to Mission 7

(UNI) Credits (added 15.04.14):
Before the title screen appears (at the Codemasters logo, or after the game over screen, or after the demo loop is over), hold B. This cheat can be done via the secret player's name, see below.

(UNI) Dizzy demo (added 15.04.14):
Before the title screen appears (at the Codemasters logo, or after the game over screen, or after the demo loop is over), hold Right + A + Start. This cheat can be done via the secret player's name, see below.

(UNI) Secret words:
Enter one of the following words as a player name in the hi-score table and you'll see some programmer's messages and demos:
"DIZZY......"-"BUY IT NOW!" (Dizzy demo)
"CREDITS...."-"FAMOUS NOW " (Credits)
"OLIVER TWIN"-"THE AUTHORS"
"CODE MASTER"-"BRILLIANT! "
"CAMERICA..."-"GOOD GUYS! "
"POGIE......"-"WE LOVE YOU"
"YOLKFOLK..."-"DIZZY FAN "
"DENZIL....."-"COOL DUDE "
"DORA......."-"DIZZYS SIS "
"DAISY......"-"DIZZYS GIRL"
"GRAND D...."-"YE WISE ONE"
"DYLAN......"-"OH WOW MAN!"
"DOZY......."-"ZZZZZZZZZZZ"
"MIG 29....."-"ITS 3D FUN "
"BMX SIM...."-"WE WROTE IT"
"BMX SIMULAT"-"ONE OF OURS"
"ROBIN HOOD."-"WE WROTE IT"
"ANDREW OLIV"-"AUTHOR "
"PHILIP OLIV"-"AUTHOR "
"PAUL ADAMS."-"ARTIST "
"GAVIN RAEBU"-"MUSICIAN "
"           "-"SOMEBODY "
"TOYOTA MR2."-"MY NEW CAR "

(UNI) Smiley test:
Absolutely all games by Codemasters have internal PRG ROM and CHR RAM testing routines. So called "Smiley tests". Tests are normally enabled, but for triggering it needs pressing all D-Pad buttons. Hold Up + Down + Left + Right + A + Select + Start to enter the PRG ROM test or hold Up + Down + Left + Right + B + Select + Start to enter the CHR RAM test, and press Reset. A green smile means that test passed, red sad face - failed.

Flappy

(GEN) Suicide:
During the game, press Select + Start to commit suicide.

Flintstones, The - The Rescue of Dino & Hoppy

Japanese version:

(UNI) Debug mode (added 07.10.07):
When the "PUSH START BUTTON" message starts flashing, press A, A, B, B, Right, Down, Down, Down, Down, Down, Down, Down, Left, Start to enter the debug mode. First, choose one of two game modes "NORMAL" and "NOHIT", then a number will appear. Press Up or Down to change it, press A to hear a sound with the corresponding number, or press Start to start from the level with the corresponding number. In the "NOHIT" mode, you will have an invulnerability and all extra abilities. Additionally, during the game on controller 2 press B to switch the game into the frame advance mode (press A to advance frames or B to switch back to the normal mode), and press Up on controller 2 to skip current level.

(UNI) Test mode (added 07.10.07):
When the "PUSH START BUTTON" message starts flashing, press A, B, A, B, Up, Right, Right, Right, Down, Down, Down, Down, Left, Left, Start to enter the test mode. This mode is a simple version of "Debug mode", allows you to select and hear a sound and music and set up the desired level. There is no "NOHIT" mode and no extra abilities are available.

US version:

(BUR) GameGenie:
SKKALTIZ+VEKAGTNA-Re-enables the cheat for the "Debug mode". After the "PUSH START BUTTON" message starts flashing, press Up, Right, Right, Right, Down, Down, Down, Down, Left, Left, Start. This mode is the same as "Debug mode" in the Japanese version, including the level skip and frame advance on controller 2, see instructions above.
Source: BMF54123

Flintstones, The - The Surprise at Dinosaur Peak!

(GEN) Debug mode:
Press A, B, Right, A, Down, Down, Down, Down, B, Left, Left, B, A, Start at the title screen. This "Debug mode" identical to the one from the "The Rescue of Dino & Hoppy", except there is no Frame advance feature anymore. But additionally an instant game over is added if you press Down on controller 2.

(BUR) Hidden text (added 25.12.08):
The RESET routine in this game uses string
misako
to check if game was soft or hard reset.

(BUR) GameGenie (added 16.04.14):
XVUAVOXK-Replaces the "Debug mode" with the "Test mode", exactly the same as in "The Rescue of Dino & Hoppy", but for some reason disabled here, while both games shares the same cheat and title screen routines.

Flipull - An Exciting Cube Game

(UNI) Level select:
At the title screen, press Down, Left, Right, Up, A, Right, Down, B, Up, Left, Start.

Flying Hero

(UNI) Continue (added 26.07.13):
At the game over screen, press Up, Up, Down, Down, Select, Select, Select, Select, Start.

Flying Warriors, Hiryuu no Ken II - Dragon no Tsubasa

US version:

(UNI) Intro skip (added 17.04.14):
To skip the starting intro, press A + Select.

(UNI) Secret passwords (added 25.01.10):
MUSIC-Sound test
END-Ending
888-Characters presentation. One by one will be displayed characters cards with short descriptions.
8xy-Level select.
x - stage number from 1 to 4.
y - substage number from 1 to 3.
For example, password "843" means the latest stage.
Source: Yakovlev Victor

(BUR) GameGenie (added 17.04.14):
GESLAPEI-Re-enables the location debug routine. During the game, hold A then press Start. A number will appear instead of the game menu. Select any location number then press Select to jump directly to it.

Japanese version:

(GEN) Secret passwords:
おんがく-Sound test
さいご-Ending
Source: ReyVGM

Fong Shen Bang - Zhu Lu Zhi Zhan

(UNI) Debug (added 26.07.13):
To enable debug mode, during the game, hold for a while Up + B + Select + Start. A sound will confirm if code is enabled. Now, press Select to toggle on and off walk through the walls, press Start while in fight mode, to end it instantly.

(UNI) Unknown (added 17.04.14):
Hold Select or A + B, then press Reset. The gray glitchy square or two will appear. Probably there was some copyright screens, currently removed.

Four Players Tennis, Top Players' Tennis - Featuring Chris Evert & Ivan Lendl, World Super Tennis

(BUR) GameGenie (added 09.07.09):
XVUZILAV+XVXZGLAV (for the English versions)
XOKZTLXO+XVEZPZAV (for the Japanese version)
-Enables copyright easter. While in game, enter game menu and select "ADVICE" option, now hold A on controller 2 and enter sequence Up, Down, Left, Right, Up, Left, Down, Right on controller 1. From now instead of generic advice Ivan or Chris will talk three times in row: "COPYRIGHT 1989 HOMEDATA! COPYRIGHT 1989 HOMEDATA!! COPYRIGHT 1989 HOMEDATA!!!".

Free Fall, Sunday Funday (Wisdom Three)

Sunday Funday game:

(UNI) Skip level (added 30.01.15):
Just like in the original version of this game "Menace Beach", start a new game, then press Up on controller 2 and Up + A + B on controller 1 at the same time. Now, during the game press B + Select on controller 1 to advance to the next level, up to ending animation sequence.

Freedom Force

(GEN) Unlockable:
After completing all levels, a message with some secret words will appear. Secret words are: "SPYHUNTER", "XENOPHOBE", "PLATOON". All these are other SunSoft titles, but meaning of these words is unknown, except they are all other SunSoft titles.

(UNI) Sound test:
Connect controller 2 to the console instead of the Zapper. At the game mode selecting screen hold Up + Left + A + B on controller 2. Use controller 2 to selecting and playing music. Press A + B to exit.

(UNI) Secret message (added 06.06.09):
After beating all 5 levels, when message "CONGRATULATION" appears on the screen, on controller 2 press A. Message "HIRO-KUN" will appear.

(UNI) Level skip (added 24.05.11):
Pause the game (controller 1 must be connected), then press A 16 times and additionally one more time for each level. For example, you must press A 17 times to skip Level 1, and 21 times to skip fifth level. This works only once per game.

(BUR) Hidden message (added 06.06.09):
There is some unused text strings in bank 1. There is no cross-refrences to these strings in code at all. Probably it was meant to display somewhere in attract mode.
SUN ELECTRONISC CORPORATION
WELCOME TO OUR OFFICE
        MR RICHARD
        MR MENDHEIM
Another one unused string present between generic game strings at bank 3.
PRESENTED BY [SUNSOFT]
Note, that "[SUNSOFT]" written with other font, which is mostly removed from the final CHR ROM data. There is only [-FT] left.

(BUR) GameGenie (added 06.06.09):
EENVZLAA-Enables some game features designed for the VS arcade system version. It will enable a hi-score table, "INSERT COIN" message and some other stuff. The name entry screen quite unfinished and only partially working, and you can't save your name in the record table.

Fushigi no Umi no Nadia

(UNI) Secret words (added 17.04.14):
Enter one of the following words as a player's name:
でばッぐ-Maximum stats by default for all units. Note, that before "ぐ" used symbol from Katakana slphabet, not the Hiragana as the rest of the symbols.

(BUR) GameGenie (added 17.04.14):
AESYENNY-Something with the stage select menu involved, probably allows you to select any stage independently whether they completed or not.
AESYXNNY-Re-enables the Unit Level Setup secret word. Enter as a player's name "__AB", where "_" are empty symbols, "A" and "B" are characters from "あ" to "こ", each representing the number from 0 to 9, so you will get the desired level number of every units in your team. For example name "__ここ" will give you all 99 level units.
AESYUNNY-Misc message display disable.
AESYONNY-Re-enables the Ending sequence secret word. Enter as a player's name "えんど_", where "_" an empty symbol. Start a new game and select this slot to see the Ending sequence.
AESYKNNY-Re-enables following debug features. Soft Reset, press Select + Start any time during the game. An extra "DEBUG" menu option in the main game menu, allow you to edit some game parameters. Need investigate. The enemy AI monitor during enemy turn. And some other internal features.
AESYSNNY-Some unknown CPU AI adjustments.

Fuzzical Fighter

(GEN) Palette editor:
While playing on Ship mode, press Up on controller 2 to pause the game and then press A, B, Up, Down on controller 1. If done right, a bunch of numbers will appear. Use these numbers to change the colors of the game. For some unknown reason, this was a leftover from the development stage didn't disabled in the final release. Actually this secret code was intended for the cheat described below.
Source: ReyVGM

(UNI) Extra gold and maximum HP and MP (added 18.04.14):
Enter the Palette editor mode, as described above, when your maximum HP is exactly 224, and amount of gold meet the rule: in a hexadecimal notation, the lower 8 hex nibble of the gold number should be the same as higher 8 hex nibble (for example, first obvious amount is 0, also decimal 257 in hex notation is $0101, or decimal 1285 is $0505 in hex, both meets this condition). If all conditions are met, hold Down on controller 1 and press Select or Start to exit the Palette editor mode. You'll get the 7777 gold and 240 both to maximum and current HP/MP, as well as 9 Fuzzy points.

(UNI) Free magic (added 18.04.14):
During the game, select any magic, use it by pressing A on controller 1 while holding any button on controller 2, except Up, to cancel MP consumption. This means that any magic can be used any time any number of times, and seems this cheat is one more development leftover, since it's very easy to beat the game with this cheat with no need to upgrade and lift up your abilities.

(UNI) Hyper debugger mode:
At the title screen, hold A + B on controller 2 and A or B on controller 1 at the same time, then press Select on controller 1.

G.I. Joe

(UNI) Secret passwords:
ZLGMZLGMZ-3 Members, Leader Duke, Maximum level
ZSFXZSFXZ-2 Members, Leader Duke, Maximum level
ZKNZZLBBZ-2 Members, Leader Duke, Maximum level
ZMSCZTSTZ-Sound test
Z1STZNDGZ-Ending sequence

(BUR) GameGenie (added 02.01.08):
PTUAOYZY-Replaces the Sound test mode with the CHR test mode, disabled in the final release.
PENEXTAA-Replaces the Password screen with the old debug stage select menu.
AEKEAAAE-Re-enables the in-game shorctuts. Press Right + A + B to commit suicide or press Left + A + B to skip current level.

G.I. Joe - The Atlantis Factor

(BUR) GameGenie (added 26.12.12):
PEEALLAA-Re-enables the disabled cheat code for the level skip. During the game, press Left + Select to complete the current level.

(BUR) Unused (added 18.04.14):
Hold B, then press Reset. This will clear some internal RAM buffers, but they actually was eraced just before that by the RESET procedure itself. So this cheat does nothing. Probably, at the development stage this meant to be used to clear hi-score table, which isn't present in the final release.

(UNI) Copyright screen (added 18.04.14):
Hold A, then press Reset. This will show the Capcom logo and the copyright screen, that will be showed by the game itself at the game's boot. So, the Capcom logo will be displayed twice. One more seemingly useless cheat, like the previous one, probably intended to keep copyrights if the game was somehow hacked (ant IT IS!).

Galaga

European version:

(BUR) Hidden text (added 08.02.13):
There is a hidden copyright text at the start of the ROM:
TM AND COPYRIGHT 1981 1988 NAMCO LTD.
Another one message is hidden inside the CHR graphics at the second CHR page, tile $CF:
COPYRIGHT NAMCO
The Japanese version of this game have only the CHR part of these messages.

Galaxian

(UNI) Music player (added 04.12.08):
Power the console, press Reset 44 times. Then, hold A + B on controller 2 then press Reset one more time. Screen will changes, at left side of screen will fall flashing in music rhythm tile, until it reaches bottom of the screen you can press Reset again, each 45 pressings will change music. There is total 5 melodies hidden between graphic tiles in CHR ROM. For last two melodies offset in CHR ROM shifted by 128 bytes, or 8 tiles from starting play offset, so you will hear some strange "music" while first 8 tiles with normal graphics will play. It is possible to trigger this player another way. Reset the system only 10 times after power on, then shout in microphone on controller 2 of Famicom console 4 times. This need additional 34 resetting before reaching second melody.

(BUR) Hidden text (added 04.12.08):
There is hidden copyright text in ROM:
COPR.1984 NAMCO HARUHISA UDAGAWA


Galaxy 5000

(GEN) Credits:
Press Left, Up, B, Left, Up, B at the game over screen after using all continues.

(GEN) Cheat menu:
At the title screen, after first alien appear on the screen, press B, Left, Up, Right, B. Start 1 Player game, select controls and press Start. A secret "DR DAVES CHEAT SCREEN" will appear.

(BUR) Hidden text (added 09.07.09):
There is a hidden copyright text at end of ROM file:
(c)1991 Activision. 01/21/91 David J. Ross
for the European version and
(c)1990 Activision. 06/28/90 David J. Ross
for the US version.

Gambler Jiko Chuushin Ha - Mahjong Game

(FIX) Multiple Harutans:
At the game mode screen, select Free Mode. Then at the character selection screen, on controller 2, press Up + B, Up, Right + B, Down, Right, Up, A + B, Left. If done right, a sound will be heard. Now you can pick the Blue Monster (Harutan) from the second players page and pick him as your 2nd and 3rd option too.
Source: ReyVGM

(UNI) Autoplay menu (added 18.04.14):
Normally during the game, only in the Free play mode you could enter the in-game menu by press Select and select either to open all players tiles or enable autoplay. However, you can open the same menu in any other mode if hold Up + Down + Right on controller 1 before pressing Select.

(BUR) Hidden text (added 09.07.09):
There is a hidden version text in ROM:
Thu Jul 28 00:19:00 1988


Gambler Jiko Chuushin Ha 2

(GEN) Multiple Harutans:
At the game mode screen, select Free Mode. Then at the character selection screen, pick the Blue Monster (Harutan) from the second players page. Now, start yelling on the Famicom's microphone while you hit A to pick him as your 2nd and 3rd option too.
Source: ReyVGM

(UNI) Autoplay menu (added 19.04.14):
Normally during the game, only in the Free play mode you can see the opponent tiles using the menu by press Select. In any other mode, however, you can enable this option too, using the 4-Player adaptor for the Famicom. During the game, enable the autoplay mode, then hold for a short time Up + Down + B on Controller 3, to enable the rest of the menu options. Now, you can disable the autoplay mode and open your opponent's tiles.

(BUR) Hidden text (added 09.07.09):
There is a hidden version text in ROM:
ASM-2J 90/09/20=1.02R1


Game Party

(UNI) Cheat controls (added 21.04.14):
Hold A on controller 1 and B on controller 2 at the same time, then press Reset. During any game, except "MIND Q", press Select on controller 1 to enable cheat controls, using D-Pad on controller 2 move the ball in any place, additionally while holding A or B on controller 2 you can move also the player 1 or player 2 rackets in the "AIR HOCKEY" game or lift up or down the ball in the "BASKETBALL" game. Press Start to return controls to normal state and continue playing. If you press Select at the main game menu, the cheat controls will be disabled. Was actually a part of this cheat, involving the additional key press after the game selection, when some flag is displayed, but for some reason isn't used.

Ganbare Goemon Gaiden - Kieta Ougon Kiseru

(FIX) Easter egg (added 21.04.14):
After beating the last boss, at the image where all 4 characters are standing looking to the left, press A, B, A, B, A, B, A, B, A, B, A, B, A, B, A, B, A, B, A, B and you'll see Yae in a Bikini instead of her usual clothes.
Source: ReyVGM

Ganbare Goemon! - Karakuri Douchuu

(GEN) Contine:
At the game over screen, hold A + B then press Start. If done right, you'll continue on the same stage you were in and you'll keep your energy bar, but half the money.
Source: ReyVGM

(GEN) Map screen (added 21.04.14):
During the first person events, press A + B to see the map.

(UNI) CRC test (added 30.10.07):
Hold A + B, then press Reset. After some time message "ごえもん 1ばん" and "こなみ 1ばん" appears. First one is results for PRG CRC test, second one for CHR CRC test. If test fails, then message will be "2ばん".

Ganbare Pennant Race!

(UNI) Secret passwords:
S-Sound test
ふらの-Ending sequence

Ganso Saiyuuki - Super Monkey Daibouken

(GEN) Level select (added 24.04.07):
At the title screen, by pressing combinations of A or A + B you may select game area then press Start to enter it. Some of this codes are unlockable passwords in game.
A + B-Area 1
A + B, A-Area 2
A + B, A + B-Area 3
A + B, A, A-Area 4
A + B, A, A + B-Area 5
A + B, A + B, A-Area 6
A + B, A + B, A + B-Area 7
A + B, A, A, A-Area 8
A + B, A, A, A + B-Area 9
A + B, A, A + B, A-Area 10
A + B, A, A + B, A + B-Area 11
A + B, A + B, A, A-Area 12
A + B, A + B, A, A + B-Area 13
A + B, A + B, A + B, A-Area 14
A + B, A + B, A + B, A + B-Area 15

Garfield - A Week of Garfield

(UNI) Level select (added 22.04.14):
At the title screen, press Up + Left + B on controller 2 to increase the starting level number up to 8, press Start to play from the selected level.

(BUR) Hidden text (added 10.07.09):
There is a hidden copyright text in ROM:
Written by Masashi Itoi. (c) Copyright MARS Corporation. 1988


Gargoyle's Quest II - The Demon Darkness, Red Ariimaa 2

(UNI) Secret passwords (added 26.07.13):
14142135-1732050-Start a game with extra 9 lives and all magic available.

Gauntlet

(GEN) Soft reset:
During game, press A + B + Select + Start.

Gegege no Kitarou - Youkai Dai Makyou, Ninja Kid

(UNI) CRC test (added 26.07.13):
Hold any button on controller 2 then press Reset. The game will test PRG and CHR ROMs consistency with 16-bit checksum. If the PRG test fails, then screen will locked with the red color. If the CHR test fails, then screen will be blue. If all is ok, then game will continue as usual. The US version has the checksums from the Japanese version, so PRG test don't pass.

(UNI) Unlimited lives (added 26.07.13):
Hold on controller 1 Left + B, press Reset, release the buttons.
Hold Right + B, press Reset, release the buttons.
Hold Up + Down + Left + B, press Reset, release the buttons.
Hold Down + B, press Reset, release the buttons.
Hold Right + B, press Reset, release the buttons.
Hold Up + Right + B, press Reset, release the buttons.
If all done right, the live counter won't be decreasing after death. Note, if you write down the button codes for this cheat: 42 41 4E 44 41 49 in ASCII, you'll get the string "BANDAI".

Gegege no Kitarou 2 - Youkai Gundan no Chousen

(BUR) GameGenie (added 22.04.14):
PAKKXTAA-Re-enables debug HP refill. During the game hold A on controller 2 for some time.

Geimos

(BUR) GameGenie (added 26.12.12):
AEEIXKNY-Enable debug feature to record replay for the demo sequence. Since offsets are set for the ROM data, you cannot actually record something.

Gekitotsu Yonku Battle

(BUR) Hidden text (added 08.02.13):
There is an unused text sting at the end of some PRG banks:
JECT DMA ADDRESS 2E4H
Additionally, this game contains a few of source code lines, used as padding:
24,$24,$24,$24,$24,$24
;COKL5	.BYTE	$24,$24,$24,$24,$24,$24,$24,$24,$24,$24,$24,$24,$24,$24,$24,$24
;	.BYTE	$24,$24,$24,$24,$2
and
	STA	WORK1
	TYA
	AND	#$FE
	ASL	A
	ROL	TEMP1
	ASL	A
	ROL	TEMP1
	ASL	A
	R


Gekitou Pro Wrestling!! - Toukon Densetsu, Tecmo World Wrestling

(GEN) Sound test:
At the title screen, press Up + Left + A + B + Select.

Genpei Touma Den - Computer Boardgame

(GEN) Flashing Attacks (added 26.07.13):
At the title screen, hold Select then press Start. If done right, the attacks during battle will be flashier.
Source: ReyVGM

Getsufuu Maden

(BUR) All items (added 07.10.07):
The game still performs a check for A held at the game start. In this case it sets up $7D9 and $7DA variables corresponding to the inventory items to $FF. But before game starts this variables are rewritten with $01, so cheat is discarded. Probably this was quick lazy debug feature.

(BUR) GameGenie (added 25.06.08):
SUUSUOKN-Enables some debug features.
In map mode you can press at the same time A + B + Select to clear internal map data for current screen location and will be able to move any position in that region.
In game hold Up + A + B then press Select to cycle through game modes.

Ghostbusters II

(BUR) GameGenie (added 22.04.14):
SEEVLKXT+PKEVGKXT-Re-enables the Stage skip cheat. During the game demo and title sequences, before the player select menu, on controller 2 hold Right + Select and press A, A, A. Release all buttons. During the game, press Select on controller 2 to skip current level till the ending sequence.

Ghosts'n Goblins, Makai-Mura

Japanese version:

(GEN) Continue:
After the game over screen at the title screen, hold Right and press A or B three times, then press Start.

All versions:

(FIX) Level select (added 22.10.07):
At the title screen, hold Right and press A or B three times. Release Right and press Up, B, B, B, Left, B, B, B, Down, B, B, B, Start. After player screen, a number and letter will appear. Press A or B to select starting level and press Start to begin from the selected level.

(FIX) Credits message (added 22.10.07):
Complete both quests, then at the "...CHALLENGE AGAIN!" screen press A, B, Up, Down, A, B, Left, Right and wait for "GAME OVER" message.

Ghoul School

(UNI) Debug mode (added 09.12.07):
At the "Electro Brain presents" screen press quickly B, Up, B, B, Left, Select. You can select any game screen or level to start, play sound or game music, and after start you will have all items in inventory.

Gilligan's Island

(UNI) Episode select (added 26.07.13):
At the episode number screen, hold Down + Right + B on controller 2, then press Down on controller 1 to increase the episode number from 1 to 4.

Gimmi a Break - Shijou Saikyou no Quiz Ou Ketteisen

(GEN) Player select (added 23.04.14):
Start a game with the regular controllers, don't plug the special quiz buzzers controller. Before the second round of the Quiz game, you should select the player who will play agains the Quiz King. Press Up + B to select the left player instead of the King, and press Down + B to select the right player. You can select the same opponents. Press A to play this round with selected players. This is an unlockable, the game will tell this secret to you after you beat two rounds normally.

Gimmick!, Mr. Gimmick

All versions:

(GEN) Music sampler:
At the title screen, hold Select and press Start.

Japanese version:

(BUR) GameGenie (added 24.04.14):
ZEETLZPS+ZEETLZPS-Re-enables the debug cheats. During the game press Select on controller 1 to refill HP. On controller 2, press A + B to increase lives. Use the D-Pad buttons will warp to one of the four level's checkpoints instantly. Press B to win current level and return back to the map with bad ending. To enable the good ending hold additionally A.

European version:

(BUR) GameGenie (added 24.04.14):
PAVVTZAA-Re-enables the debug cheats. On controller 2, press press A to refill all items and HP. Use the D-Pad buttons will warp to one of the four level's checkpoints instantly. Press B to win current level and return back to the map with bad ending. To enable the good ending hold additionally A.

Goal! 2, Goal! Two, Goal!!

(UNI) Hard mode:
Hold Up + A + B + Select + Start on controller 1 and press Reset. Title name color will change to blue for the Japanese version, or Title background color will changed to dark blue for the US version.

(UNI) Music test:
Hold A + B on controller 2 and press Reset.

(BUR) Hidden text (added 25.04.14):
The RESET routine in this game uses string
GOAL2.JALECO.'92
to check if game was soft or hard reset.

Godzilla - Monster of Monsters!, Godzilla

(FIX) Secret passwords (added 06.01.08):
Note: the passwords uses the number "0", but not the letter "O".
S0UND-Sound test
DESTR0Y ALL M0NSTERS-Boss fight
MAR-Mars level
JUP-Jupiter level
SAT-Saturn level
URA-Uranus level
PLU-Pluto level
NEP-Neptun level
X STAR-X-Star level
START-Game start
START T0 END-Ending sequences
M0NSTER 0-Ghidora fight

Golf '92, The

(UNI) Hole select (added 27.07.13):
Hold Down + Left + A + B + Select on controller 1, then press Reset. During the game press Select to switch to the hole select screen.

(UNI) Autoplay mode (added 27.07.13):
Hold Up + Right + A + B + Select on controller 1, then press Reset. Now both players will be CPU controlled.

Golf Club - Birdy Rush

(BUR) Hidden text (added 08.02.13):
There is a hidden copyright message inside the ROM:
copyright (c) 1987 DATA EAST corporation
All rights reserved


Golgo 13 - Dai 1 Shou - Kamigami no Tasogare, Golgo 13 - Top Secret Episode

All versions:

(GEN) Stage Select:
To enable this cheat you must wait until the helicopter demo ends, and wait untli Duke's eyes show up. Press Start to skip to the title screen before the text appears. At the title screen hold Up + A + B on controller 1 and Up + Left + A + B on controller 2, tehn press Start on controller 1. Codes of the levels are in following table:
00-Level 1
02-Level 1a
08-Level 2
0A-Level 3
0E-Level 3a
12-Level 4
1A-Level 4a
1E-Level 5
32-Level 7
38-Level 8
3B-Level 9
40-Level 10
49-Level 13

Japanese version:

(UNI) Lyrics easter (added 28.04.14):
During the game, press Start to pause it. While lyrics is displaying, sing into the microphine on controller 2. If you sing long enough, after the lyrics is over, the game will display your score from 10 to 100.

US version:

(BUR) GameGenie (added 28.04.14):
XTKATPAV+XVUEAIAV-Re-enables the Lyrics easter. Unfortunately, the fonts for this screen were completely rewritten, and since the lyrics and other text are still in Japanese, there is nothing to read, actually.

Golgo 13 - The Riddle of Icarus, Mafat Conspiracy - Golgo 13

Japanese version:

(UNI) Debug menu (added 03.01.08):
Any time during the game, hold Select on controller 1, then quickly press A, B, A, B, A, B, A, B, A, B, A, B, A, B, A, B on controller 2. You will be able to select any plot animation or level, also use the D-Pad buttons on controller 2 controls to play music and sound effects.

US version:

(BUR) GameGenie:
IAUKZLYA-Re-enables the debug menu disabled in the final US release. Just reset the console after applying the code.

Goonies, The

(GEN) Continue (added 16.01.14):
At the game over screen, hold Up + A and press Start.
Source: ReyVGM

(BUR) Hidden text (added 08.02.13):
There is a hidden serial and version string at the start of the PRG ROM:
RC809 1,0 860107
for the Console version
RC001 1,0 861128
for the Arcade version.

Goonies II, The - Fratelli Saigo no Chousen, Goonies II, The

Release versions:

(UNI) CRC test (added 30.10.07):
Hold A + B on controller 1, then press Reset. After some time, the message "GOONIES2 ONE" will appear if the PRG CRC test is OK, or "GOONIES2 TEN" if the CRC test fails. The European version of the ROM has the "TEN" message.

(BUR) Secret messages (added 29.04.14):
The Prototype version of this game has the secret message in "TRANSCEIVER" tool, but after the program was redesigned, the player 2 controls merged with the player 1 controls and cheat just isn't available. To enable this in the Japanese version, set the RAM variable $09 to value $07. Unfortunately, not only the controls are unavailable in the US version of this game, but all messages are dummied out. There is only message left in the strings table: "WE'RE SORRY. THE CONTENT HAVE BEEN TAKEN OUT.", but its actually isn't used anymore.

Prototype version:

(UNI) Secret messages (added 29.04.14):
During the game, when you find the "TRANSCEIVER", enter any door, from the menu select the "TOOLS" option, highligh the "TRANSCEIVER" in the tools list, hold Down + A + B on controller 2, then press A on controller 1. One of the 12 secret "KONAMI STAFF!" messages will appear randomly each time you press A, while holding the buttons on controller 2.

Gozonji - Yaji Kita Chin Douchuu

(GEN) Secret password (added 22.12.12):
へゆたむき かはづとびこむ こらはへた-Sound test.
Source: ReyVGM

Gradius

(GEN) Full power-up:
Pause the game and press Up, Up, Down, Down, Left, Right, Left, Right, B, A, Start. This may only be done once per level.

(GEN) Continue:
Quickly press Down, Up, B, A, B, A, B, A, B, A after losing the last ship on level two or higher.

(FIX) CRC test:
Hold A + B, then press Reset. Game performs self CRC test, if PRG match internal CRC then displays text "KONAMI ONE", otherwise "KONAMI TEN", if CHR match internal CRC, then displays text "GRADIUS ONE", otherwise "GRADIUS TEN". Known European version do not pass the CHR test.

(BUR) Hidden text (added 08.02.13):
There is a hidden serial and version string inside the ROM:
NC810 1,0 860917
for the US version
RC810 1,0 860219
for the Japanese version
NC810 1,0 860917
for the European version.

Gradius II

(GEN) Extra 30 lives:
At the title screen, press Up, Up, Down, Down, Left, Right, Left, Right, B, A.

(GEN) Sound test:
At the title screen, hold A + B, then press Start.

Grand Master

(BUR) Hidden text (added 17.06.09):
There is a hidden copyright text for sound driver inside ROM:
GAME SOUND(C) 1990-09-10 SOFT MACHINE INC


Great Battle Cyber

(UNI) Ending sequence:
Press Up, Down, B, Right, Down, Up, Up, B at the title screen, then select player and start the game.

(UNI) Extra 9 lives (added 10.01.09):
Press B, Left, Left, Up, Down, A, Right, Up at the title screen, then select player and start the game.

Great Deal

(UNI) Level select (added 28.07.13):
At the stage number screen, press A + B on controller 2 to increase the current game's level.

Great Tank, Iron Tank

(UNI) Password generator (added 29.03.08):
Level Index:
Password:
Note:Smaller indexes leads to farther levels.
There is only 84 save points in game
so many of indexes leads to the same places.


(BUR) Hidden text (added 10.07.09):
There is hidden message inside ROM:
PROG. NO KNT DESU.NINTENDO NO BOKE AHO-KASU SHINE TSUBURERO-FAMICOM NANKA KIRAIDA-!Aho no Mr.T!! Koroshitannen!"
Which means: "KNT's program. Nintendo is a bunch of shitty old fools who should die and go bankrupt. The hell is this Famicom?! I HATE IT! That retard, Mr. T!! I'll kill him!"
Translated by RahanAkero

Great Waldo Search, The

(UNI) Soft reset (added 30.04.14):
During the game, press Select + Start.

(FIX) Stop time (added 30.04.14):
During the game, press B on controller 2 to toggle the timer stop and run again.

(UNI) Search hint (added 30.04.14):
During the game, hold A on controller 2 to scroll to the next hidden object on the screen automatically.

Great Wall, The (Sachen)

(UNI) Sound test (added 30.04.14):
At the title screen, press A on controller 1, then select the music with Left or Right.

(UNI) Extra pts. (added 10.04.10):
During the game, press A + B + Select to add 500 pts to your score.

(UNI) Easter egg (added 10.04.10):
Before the title screen appears, hold A + B + Select. When screen turns black, release the buttons and enter A + Select, B + Select, Select + Start, A + Select, B + Select, Select + Start. Message "SACHEN" will appear on the screen.

Greg Norman's Golf Power

(BUR) Hidden text (added 10.07.09):
There is a hidden copyright text in ROM:
COURSE DESIGNER CONCEPT AND PROGRAM BY SCOTT GUEST 080391


Gremlin 2 - Shinshu Tanjou, Gremlins 2 - The New Batch

Japanese version:

(GEN) Sound test:
At the title screen, press A + Start.
Source: ReyVGM

Guerilla War, Guevara

All versions:

(GEN) Level and difficulty select:
Select a one or two player game, then hold A or B and press Start.

(BUR) Hidden text (added 08.02.10):
The RESET routine in this game uses string
KNT
to check if game was soft or hard reset. Also, there is more hidden texts inside the ROM:
APO? mess
DaDi DaDaDa DaDi
ATHENA ikima--su
MARIchan muzukas
hikute wakanna-i
Ganbarima-----su
Ti-----me Girl!!
Fight ! Fight !!
HoHoHoHoHoHoHoHo
Knt mess
NIKAGETSU DE TSU
KKUTTAN DAZO-
HOMETE HOMETE
 3/9/88 20:0
 BUG GA DEMASSEN
YOUNI ....
Which means: "ATHENA let's GO! Mari-cutey is so difficult I cannae understand. Good luck! Finished it in two months. Impressive, impressive. It looks bugless...".

Japanese version:

(UNI) Hidden game (added 28.06.12):
Enter the Level select mode as described above. Select 5th level, then hold Up + A + B on both controllers at the same time and press Start on controller 1. Minigame "Sasuke vs. Commander", an early game by SNK, will appear.
Source: tcrf.net

Guardian Legend, The, Guardic Gaiden

(GEN) Sound test:
Hold A + B, then press Reset.

(GEN) Messages debug:
At any generic message/hint displaying room, press Select to enter the map/weapons menu, then press Select to exit back to the game, but do not release the button. While holding it, you still can skip the current message line when cursor is blinking with B, but when the last line of the message is displayed and no cursor is blinking, additionally you may press A or B to skip to the next message. The Japanese version version of this game has no range checking for the message index and the game will crash after the last one in library. The US version has this fixed and messages will wrap from the last to the first one.

(GEN) Secret passwords (added 06.05.14):
TGL (for the US version)
えいえるじい (for the Japanese version)
-No action sequences (Unlockable)
Source: tcrf.net

(UNI) Password generator (added 01.02.16):
Items obtained #1:
 Unused
 X23:Y 8 Blue Lander
 X21:Y13 Weap 12
 X17:Y23 Weap 12
 X12:Y22 Blue Lander
 X 8:Y11 Red Lander
 X 6:Y 3 Shield
 X 0:Y 3 Power
 X 1:Y 0 Weap 12
 X12:Y 4 Power
 X16:Y12 Power
 X 8:Y13 Weap 4
Mini-bosses eliminated:
 X14:Y 9 Blue Lander
 X 4:Y11 Weap 6
 X 0:Y 6 Red Lander
 X 5:Y17 Attack
 X 1:Y14 Red Lander
 X 1:Y20 Weap 12
 X 6:Y23 Shield
 X16:Y 3 Weap 1
 X18:Y 1 Attack
 X19:Y 8 Weap 3
 X21:Y 4 Shield
 X18:Y10 Shield
 X17:Y16 Red Lander
 X16:Y18 Weap 5
 X22:Y20 Shield
 X12:Y18 Red Lander
 X12:Y22 Weap 12
 X 5:Y 3 Weap 3
 X 2:Y 0 Blue Lander
 X11:Y 4 Shield
 X12:Y 0 Weap 12
Items obtained #2:
 X 8:Y 9 Weap 1
 Unused
 X 4:Y12 Weap 11
 X 3:Y10 Weap 2
 X 3:Y14 Blue Lander
 X 0:Y 9 Power
 X 0:Y22 Shot Rate
 X 6:Y22 Red Lander
 X19:Y 6 Blue Lander
 X17:Y 2 Weap 11
 X23:Y 6 Weap 4
 X23:Y 3 Weap 5
 X18:Y12 Weap 1
 X20:Y10 Weap 6
 X19:Y19 Weap 8
 X22:Y23 Shield
 X10:Y18 Power
 X14:Y20 Weap 12
 X 3:Y 6 Blue Lander
 X 3:Y 3 Red Lander
 X12:Y12 Shot Rate
 X 2:Y17 Shot Rate
 X16:Y 0 Shot Rate
 X 9:Y19 Weap 9
 X 9:Y14 Weap 10
Shop items bought:
 X13:Y11 Weap 3
 X13:Y10 Weap 7
 X12:Y10 Weap 2
 X10:Y10 Weap 8
 X10:Y11 Weap 9
 X 1:Y18 SR/HRT/W1
 X23:Y21 SR/HRT/W3
 X18:Y 0 BL/POW/W4
 X15:Y12 RL/POW/W5
 X12:Y 5 W7/POW/W6
 Key 1
 Key 2
 Key 3
 Key 4
 Key 5
 Key 6
 Key 7
 Key 8
 Cor 1
 Cor 2
 Cor 3
 Cor 4
 Cor 5
 Cor 6
 Cor 7
 Cor 8
 Cor 9
 Cor 10
 Cor 11
 Cor 12
 Cor 13
 Cor 14
 Cor 15
 Cor 16
 Cor 17
 Cor 18
 Cor 19
 Cor 20
 
 
 
 
 Weap 1
 Weap 2
 Weap 3
 Weap 4
 Weap 5
 Weap 6
 Weap 7
 Weap 8
 Weap 9
 Weap 10
 Weap 11
 Weap 12
 EE Rounds
 Random
 Red Landers
 Max HP
 X Pos
 X Pos
 Attack
 Shield
 Shot Rate
0 Scores
USAJapan


Gun Nac

All versions:

(GEN) Level select:
Enter the "GUN-NAC CONTROL ROOM" mode and set "SOUND" index to "05". Now you can set any level including hidden Level 0.

(GEN) Quick configuration:
Hold A + B, then press Reset.

(FIX) Extra money (added 27.05.11):
After the game start, at the Shop, hold Left + Select, then press A or B to exit it. Instead you'll obtain an extra 10$ and this allows you to buy weapons before the first level. If the Debug mode enabled, this will give you extra 30$.

(FIX) Money to bombs (added 07.05.14):
In the shops during the game, point the menu cursor at the "END" option, then press Right + Start. Instead of exit, the shopkeeper gives you an extra ability to convert every 10$ found during the game into extra bomb. This ability can be bought also during normal game.

(BUR) GameGenie:
PENNOYAA-Re-enables the debug mode. In debug mode you cannot get the good ending, or enable extra ending pictures. At the game boot, at the "NAXAT" logo screen, hold Up then press Start to view ending sequence. In configuration menu, you will be able to select any level by default, a lot mode extra configuration options are available, like weapon and bomb type selection, invulnerability switch. During the game, press Start to pause it, then hold A and press Select to request blue enemy with bomb inside instantly, hold B and press Select to request the same but with weapon inside.

US version:

(UNI) Invulnerability (added 10.11.08):
Wait until the starting cut scene sequence is about to end and hold A + B at controller 1. Demo sequence will continue with additional graphics from the Japanese version removed from the US version and messages "DEATH & NON-DEATH FREE SELECT MODE OK!" (this will enable "Invulnerability" option in configuration menu) and "OPTION DEMO" will appear.

(UNI) Extra ending (added 10.11.08):
After game completion, when the first demo sequence is about to end, but before the credits roll, hold A + B on controller 1 to view ending sequence from the Japanese version removed in the US version. This will enable "Invulnerability" option in configuration menu as well.

(BUR) Hidden text (added 11.07.09):
There is a hidden texts inside ROM:
1990-12-17 USA

 SSS EEE EEE
 S   E   E
 SSS EEE EEE
   S E   E
 SSS EEE EEE

 Y Y OOO U U
 Y Y O O U U
  Y  O O U U
  Y  O O U U
  Y  OOO UUU

 AGAIN!


Japanese version:

(BUR) Hidden text (added 11.07.09):
There is a hidden texts inside ROM:
1990-06-21 MOU
JIKI MASTER-UP,
KOREGA FC SAIGO
NO SIGOTONI NARU
NDA ROUNA,TABUN.
4KAGETUNO KIKAN
DAKARA,KORE! TO
IU SUGOI TOKORO
HA NAIKEDO,ASOBE
RU YOUNA DEKINI
HA NATTATO OMOU
KARA,MAA,YOSITO
SIMASYO. KONDOHA
DOKODE ANATATO
DEAERU KANA?
Which means: "Soon will be promotion. It seems this was my last work for FC. In April I will be moved to another place, not so good as old one. Hope I will be able to play there too. I'm curious where we meet again?".

Gun Sight, Laser Invasion

All versions:

(BUR) Copyrights check (added 05.10.07):
As most games by Konami made after 1991 year all versions of this game contains copyrights check which tests for CHR copyright data presence, copyright title screen text and code for checking the title screen text. If tests fails, the super hard "one-touch" death mode enabled, you will die even by machine gun bullets. The US version of game doing this check, but don't enables protection feature and game continues to work normally.

US version:

(FIX) Extra 9 players:
Highlight "players 3" at the "option" screen. Now you can press any of A, B, Right or Left in any sequence but summary you should press buttons 50 times. With 50th pressing you will hear the sound and number "9" next to "players" will appear. If you miss 50th pressing, try again one more time carefully.

(BUR) GameGenie (added 07.05.14):
AEKVLZPA-Switches the US version to the Japanese version. This changes the options game menu, adding a password option, but removing the scope test and the lives select options. Unfortunately password didn't work in this version at all. This flag doesn't affect the game language.

Japanese version:

(UNI) Secret passwords:
HARD-Hard "one-touch" mode
9PLY-Extra 9 players

(BUR) GameGenie (added 07.05.14):
PEKTTZAA-Switches the Japanese version to the US version. This changes the options game menu, removig a password option, but adding the scope test and the lives select options, where you can use the player lives cheat from the US version. This flag doesn't affect the game language.

Gun-Dec, Vice - Project Doom

(FIX) Debug mode:
Hold A, then press Reset. Any time during the game, press A on controller 2 to enter the stage select / sound test mode. While selecting a stage, the music will change too. Press B on controller 2 to enter the scene test mode. During the game play press Left or Right on controller 2 to decrease or increase the game speed.

Gun.Smoke

(UNI) Change controls:
At the title screen, press quickly A, B, B, Right, Right, Right, Left, Left, Left, Left, Up, Up, Up, Up, Up, Down, Down, Down, Down, Down, Down, Start. You can control the fire direction with D-Pad, instead A or B or A + B.

(FIX) Machine Gun:
At the title screen, press A, A, A, A, Select, Select, Select, Select, Right, Right, Start, after the game start you'll get the Machine Gun with 300 ammo.

(BUR) GameGenie (added 12.12.12):
PUULPANG+KZKLGPVV (for the US version)-Enables Stage Select mode at the title screen. Additionally, hold Up + Select, then press Start to switch to D-Pad control mode, mentioned above.
Source: tcrf.net

Gyrodine

(GEN) Invulnerability:
As soon as the title screen is starting to appear, press quickly Up, Down, Down, Down, Down, Down, Down, Down, Down, Down, Left, Left, Left, Left, Left, Left, Left, Left, Right, Right, Right, Right, Right, Right, Up, Up, Down, Down, Down, Down, Down, Down, Down, Down, Down.
Source: ReyVGM

Gyromite

(BUR) Hidden text:
There is hidden copyright text in ROM:
ROBOT  SOUND
 5/5 1985
HIROKAZU.TANAKA


Gyruss

(GEN) Extra 30 lives:
At the title screen press A, B, Right, Left, Right, Left, Down, Down, Up, Up then start the game.

Hacker, The (Nanjing, NJ032)

(BUR) Hidden text (added 04.12.08):
There is some hidden copyright text in ROM:
TomSoft Studio.  E-mail:tomsoft@ihw.co.cn.  Tel:(029)7223482
and
tomsoft-1997


Hana no Star Kaidou

(BUR) Hidden text (added 28.07.13):
There is some hidden copyright text in ROM:
 1987/01/20 V1.0
 PRODUCED
    BY T.FUJITA 


(BUR) GameGenie (added 28.07.13):
PAEGLAAA-Re-enables simple debug mode. Press A on controller 2 to instantly win the current level. Press B on controller 2 to skip to the next level.

Hanafuda Yuukyou Den - Nagarebana Oryuu

(UNI) Gallery (added 28.07.13):
During the game, hold Up + A + B + Select on controller 1 for a couple of seconds.

Hanjuku Eiyuu

(FIX) Sound test:
Any time during the game, on controller 2, hold A, press B, hold B, release A and hold it again, release B and hold again, release A, press Right. You'll hear a sound. Now you can use Left or Right on controller 2 to cycle through the sounds, and Up or Down to cycle through the music.
Source: ReyVGM

(UNI) Random towns (added 09.05.14):
At the map screen duging game, on controller 2, do the same as for the Sound test cheat, but instead of pressing Right, press Left at the end of the cheat sequence. From now, if you shout to the microphone on controller 2, the town occupations will be randomly shuffled, even if some towns was previously occupied by the same flags, they all will be randomly shuffled again to all players. This will also enables the Time speed increase and Unknown cheats at the same time. To forbid this to happed, hold Down on controller 2.

(UNI) Increase time speed (added 09.05.14):
Duging game, on controller 2, do the same as for the Sound test cheat, but instead of pressing Right, press Down at the end of the cheat sequence. Now the time will go much faster, as well as the movement speed of all enemies. If combined with the Random towns cheat, this will disable the shop events.

(UNI) Unknown (added 09.05.14):
Duging game, on controller 2, do the same as for the Sound test cheat, but instead of pressing Right, press Up at the end of the cheat sequence. Something happen when you select your last or castle with number 12. Need investigate.

Happy Camper

(GEN) Level select:
Anytime during the game, hold B and press Select. It will warp you to a new area in the game. Some of these areas are unplayable, but you can keep doing this trick until you get to an area that is playable.

Happily Ever After (Prototype)

(BUR) GameGenie (added 22.05.16):
GAUGLXGK-Re-enables two debug cheats.
Hold Start, then press Reset to access a simple sound test (use D-Pad to select music or sounds, press A to play or B to stop.
Hold Select to access a simple level select. Just press one of the D-Pad buttons to get to the corresponding level. Additionally, hold A to enable full items and invulnerability during the game.

Harry's Legend, Titenic

(UNI) Water level change (added 13.05.14):
Seems this is a leftover or debug feature for the "Titenic" versions of the game. During the game, press Up or Down on controller 2 to change the level of water filling the current screen.

(UNI) Call support (added 13.05.14):
During the game, on controller 2 press A to enable the selection for the supporting character. Press Left or Right to select between 4 characters, including the Harry itself. Press any other button on controller 2 to enable the supporting character. All other characters, except Harry will be CPU controlled, if Harry is selected, the controls will be synchronized with the controller 1 input, so two Harry's will be do the same moves.

Hatris

All versions:

(UNI) Harder mode (added 04.06.11):
At the title screen hold Down then press Start. Shop mode will be "SHOP Bx" instead of "SHOP Ax" for the Japanese version.

(BUR) GameGenie (added 04.06.11):
GAEKLKGK (for the US version)
GEXGPUGK (for the Japanese version)
-Re-enables SRAM checking routine allowing you to save your records in hi-score table after reset. With battery-backed RAM this feature will allow you to save hi-score table after console power down.

Japanese version:

(UNI) Credits (added 04.06.11):
At the title screen press Left + B + Select.

(BUR) GameGenie (added 04.06.11):
XTEAUZAV-Re-enables text typing sound while displaying credits. In the final version, this sound was disabled at all and all credit names displayed silently.

Heavy Barrel

Japanese version:

(FIX) Level select (added 06.01.08):
At the title screen hold on controller 2 one of the following codes then press Start on controller 1.
Up + Right-Level 2
Right-Level 3
Down + Right-Level 4
Down-Level 5
Down + Left-Level 6
Left-Level 7
Up + Left-Level 8

(FIX) Infinite lives (added 13.05.14):
At the title screen, hold A on controller 2, then press Start on controller 1. This cheat can be combined with the Level Select cheat as well.

Heavy Shreddin', Snowboard Challenge

(FIX) Extra 99 lives and level select (added 06.01.08):
At the title screen, hold Left + A + B and press Start. At the difficult select screen press A to switch to next race instantly.

Hector 87, Starship Hector

(BUR) Hidden text (added 22.10.08):
Some text hidden just next to credits text data:
1987,06,08 COMPLITE OYAMA SAN OTSUKARESAMA BY RURIRURI NAGATA


(BUR) GameGenie (added 22.10.08):
GEVYYKGK (for the Japanese version)
GAXYIUGK (for the US version)
-Re-enables the level select mode called "SHOOTING GAME HECTOR TEST", just press Reset.

Heisei Tensai Bakabon

(UNI) Soft reset (added 15.04.10):
During the game, hold Start, then press Select.

(BUR) Hidden text (added 08.02.13):
There is a hidden copyright text inside the ROM:
TAKASHI FUKAWA


Hell Fighter (Sachen)

(UNI) CRC test (added 13.05.14):
Hold A + B + Select + Start on controller 1, then press Reset. Continue holding these buttons, until the message with checksums for the CHR and PRG appears. For unknown reason, probably due to program or emulation bug, the CHR test check only default CHR bank, but should check the whole CHR ROM, just like the PRG ROM does. Anyway, there is no internal CRC values to campare or verify againts.

(UNI) Easter egg 1 (added 13.05.14):
After the game start, while the "Sachen" logo animation in progress, hold A + B + Select + Start on controller 1. Continue holding these buttons until the logo is stand still. Release all the buttons except Select, and while holding it press A, B, Start, A, B, Start, Up, Left, Down, Right, Start, Start, Start, Start, Start, Start, Start, Start, Start, Start, and finally press any other additional button to enable the "SACHEN" logo kanji scroller from bottom to the top of the screen.

(UNI) Easter egg 2 (added 14.05.14):
After the game start, while the "Sachen" logo animation in progress, hold A + B + Select on controller 1 and A + B on controller 2 at the same time. Continue holding these buttons until the logo is stand still. Release all the buttons except Select on controller 1, and while holding it press A, B on controller 1, A, B on controller 2 and Up, Left, Down, Right, Start, Start, Start, Start, Start, Start, Start, Start, Start, Start on controller 1 again, then press any other additional button to enable another kanji message scroller.

(UNI) Quick level restart (added 14.05.14):
During the game, hold A + B on controller 2, then press Reset to quickly restart the current level from the beginning. Note, that the default value of lives is 5 in this case and rapid fire is on.

(UNI) Extra stage select (added 14.05.14):
In the "OPTION" menu, hold A + B on controller 2 while selecting the starting level number to be able to select from all 6 levels.

Hello Kitty World

(UNI) Sound test (added 28.07.13):
Beat the game, then at the "おしまい" screen press A + B + Select + Start on controller 1. If done right, you will be able to select the music track with Up or Down, then play it by pressing A.

Hero on Devil Lands (Waixing)

(BUR) GameGenie (added 14.05.14):
XTKNKLAV-Re-enables the generic type of debug display for many of Waixing's games. Unfortunately, the fonts are removed or doesn't displayed properly, so you can't actually see the number parameters.

Hi no Tori - Houou Hen - Gaou no Bouken

(UNI) CRC test (added 24.04.07):
Hold A + B, then press Reset. If CRC is ok, a message "HINOTORI ONE" will appear, in the other hand "HINOTORI TEN" will appear.

(UNI) Extra 90 lives (added 25.11.12):
To obtain extra 90 lives, you must meet some conditions: you must hold 50 stone blocks and your score must ends with xx23450 (e.g. 0023450, 322345, etc.). Then, when the time reaches exactly 100 seconds, hold Up + Right + A + B. From now, your lives counter will be 90.

Higemaru Makaijima - Nanatsu no Shima Daibouken, Makai Island

(FIX) Debug mode (added 22.12.12):
At the title screen, hold B then press Start on controller 1 to start a new game. Game will turn into the some kind of debug mode leftover from the development stage. Basicly this will lead to disable some collisions, so you at least will be invulnerable at any battle. Unfortunately, this will lead also to garbled game graphics. More disabled functions are available, but due to code changes they are crashes the game.
Source: ReyVGM

(GEN) Continue (added 22.12.12):
After game over, at the title screen hold Up then press Start on controller 1 to start a new game.
Source: ReyVGM

(BUR) Hidden text (added 22.12.12):
There is a hidden copyright text in ROM:
BY MASAMITSU.KOBAYASI 87/3/2
Additional, the prototype version of this game contain one more, much more detailed copyright message:
MSX ....... 1985 , FC COMMANDO 1986FC MAKAI ISLAND 1987 M.KOBAYASI S.40.3.24 BORN,THANK YOU !! NEXT GAME IS   SIDE ARMS !!


High Speed

(BUR) Hidden text (added 08.02.13):
There is a hidden copyright text inside the ROM:
 (C) COPYRIGHT 1991 RARE LTD. ENGLAND.


Highway Star, Rad Racer

Japanese version:

(UNI) Maximum speed (added 07.01.14):
During the game, hold Up while accelerate, your speed will reach maximum in 255 km/h.

All versions:

(FIX) Stage select and ending (added 07.01.14):
At the title screen, press Start to enter a car select mode, select a car then press Start again. While in demonstration mode (a message "PRESS START TO BEGIN" is displayed), press B to select the desired level, the progress bar above the speed indicator will show you the selected level. Empty progress bar means level 1, full progress bar means level 8. When done, hold Up + Right and press Start to go to the selected level. Additionally, press B more than 60 times to see the ending sequence.

Hiryuu no Ken III - 5 Nin no Ryuu Senshi

(GEN) Critical Hit:
At the last boss, hold Select + Start and choose attack. You'll deal a 250+ hit damage every time.
Source: ReyVGM

(GEN) Different Characters:
At any of the "Chapter # Push Start" screens, press Select 10 times and you'll be able to choose between any of the 5 characters.
Source: ReyVGM

(GEN) Skip Cutscenes:
While in a cutscene, hold Select + Start and press A.
Source: ReyVGM

(GEN) Secret passwords:
おしまい-Ending
おときく-Sound Test
Source: ReyVGM

(BUR) GameGenie (added 17.04.14):
GAXTYYSA-Re-enables the debug functions. During the game, press Start, then hold B, then press Up or Down to select location, while holding B press Select to move to selected location. Additionally, on controller 2, press A to hold the game, press B to enable the game delay, now press any other button to enable according bits of the delay variable, press all buttons once on controller 2 to get maximum delay, press one more time to disable delay.

Hiryuu no Ken Special - Fighting Wars

(BUR) Hidden text (added 09.12.15):
There is some hidden name in the ROM at 0x1010, just before the music data:
H.Kanagawa


Hissatsu Doujou Yaburi

(GEN) Sound test:
At the title screen, press A + B and the cursor will disappear. Now, use B to cycle through the sounds and A to cycle through the music.
Source: ReyVGM

(UNI) Invulnerability (added 16.05.14):
Hold Up + A + B + Select, then press Reset, the game skips directly to the title screen. Now, you will be invulnerable in fighting sequences during the game.

Hissatsu Shigoto Nin

(UNI) Sound test (added 29.03.12):
At the title screen, before selecting the new game or continue, press Right 32 times.

(GEN) Ending sequence (added 29.03.12):
At the title screen, before selecting the new game or continue, press Left 19 times. Now, start a new game, after starting movie sequence ending credits will follow.
Source: ReyVGM

Hit Marmot

(UNI) Ending sequence (added 16.05.14):
At the title screen, press Right + A + B + Select + Start.

(UNI) Stage select (added 16.05.14):
At the title screen, press Left + A + B + Select + Start.

(UNI) Extra bullets (added 16.05.14):
Enter the Stage Select mode, then press Up + Right + A + B + Select + Start. Now you can have 99 bullets instead of 30 in normal game mode.

Hit the Ice

(UNI) Sound test:
At the title screen, the after message "PUSH START BUTTON" appears, quickly press A, Up, B, A, Right, B, A, Down, B, A, Left, B.

(UNI) Easter egg (added 16.05.14):
During the game, when beated any of the random encounter hockey battles, on the victory sequence press A + B + Start on Controller 3, connected to the 4-Score adaptor, to restart animation sequence. You could watch the girls walking to the winners unlimited amount of times with this code.

Hokkaidou Rensa Satsujin - Ohotsuku ni Kiyu

(GEN) Continue:
After receiving the password, you'll get a screen that says "To Be Continued", to avoid having to reset the game to get out of it, just hold A + Select on controller 1 and press Up on controller 2.
Source: ReyVGM

(GEN) End The Card Game:
Whenever you are in a Blackjack match, hold B on controller 2 before dealing the cards to end the game after one match.
Source: ReyVGM

Hokuto no Ken

(UNI) Player 2 reverse controls (added 06.12.08):
At the title screen, shout to the microphone on controller 2 10 times, then hold Down + Left + A + B on controller 2 and press Start on controller 1. Start a two players game. If done right, the second player's movement controls will be reversed. This strange cheat is exactly the same as in another game by the same developer: "Nagagutsu wo Haita Neko".

(BUR) Hidden text (added 06.12.08):
There is some hidden copyright message in ROM:
Hokuto no ken copyright Tue.24.Jun.1986 Shouei system
 Pic. by K.Suzuki M.Higa
 Prg. by M.Yoshihara Y.Kishimoto Y.Sakakura
 BGM by M.Hara
Trading by H.Tokuyama
OCHAKUMI by K.Yoshino N.Satoh M.Takano
 Voice data special thanks to NINTENDO WE ARE TIRED.


Hokuto no Ken 2 - Seikimatsu Kyuuseishu Densetsu, Fist of the North Star

All versions:

(BUR) GameGenie (added 15.04.14):
LEEKIAAA+EEOPIAAA (for the Japanese version)
LEEKIAAA+EEOPTAAA (for the US version)
-Re-enables two title screen cheats. At the title screen, hold A, then press Start to obtain a maximum powerup. Additionally, press Right a number of times corresponding to the desired level number, then hold B and press Start to begin with selected leve. Both cheats can be combined.

Japanese version:

(FIX) Continue:
After the game over screen at the title screen, hold Down then press Start to continue from the last stage. Additionally, it can be used to move directly to the 4th level because of program bug. Just start a "VS PLAYER" game mode, die and then do the Continue trick.
Source: ReyVGM

(BUR) Unused cheat (added 06.12.08):
This cheat is a leftover from the first Japanese part of this game. Althought the two-player mode isn't supported in this part, all the code regarding microphone shout and player 2 controls are left and working, but unfortunately does nothing.

(BUR) Hidden text (added 08.07.09):
There is some hidden copyright message inside the ROM:
PRG by Y.Saka & M.Yoshihara / CHR by Ken.S & M.Higa
Also, the RESET routine in this game uses string
MASAHIRO
to check if game was soft or hard reset and in addition test bank switching with comparing two strings in bank 7 and bank 4. If test fails, game will hang on reset routine.

Holy Diver

(UNI) Extra lives (added 30.07.13):
Start a new game, in the beginning jump right to the top of the three. Press Start on controller 1 to pause the game, hold A + B on controller 2, then press Start on controller 1 again. The lives counter will be increased each time you doing this. It is only works on the specified height coordinates, there is a lot of places with such coordinates on the level, just try and find it.

Home Alone

(GEN) Secret message (added 01.10.09):
At the copyright text screen press on controller 1 or controller 2 Up + Left + A + B + Select once then Down + Right + A + B + Start, "HOME ALONE EXTRA SPECIAL" screen will appears. This extra copyright screen available in all Bethesda's games with the same code.

Home Alone 2 - Lost in New York

(UNI) Secret message (added 14.02.14):
Go to the 16th floor of the hotel, grab the invincibility item from the first room and enter the second room while still invincible. Make sure you have no ammo for the dart gun and press Up on the closet door. Pressing Start during the message will put you back at the beginning of level 1, but with all the items you had collected up to that point. After the message finishes, you will be warped to the next stage.
Source: tcrf.net

Home Run Nighter '90 - The Pennant League

(FIX) See the whole stadium (added 18.05.14):
At the title screen, select one of three stadiums by highlighting one of three menu items, then press A + B + Select + Start.
Source: ReyVGM

(UNI) Sound test:
At the title screen, press A + B on controller 2.

Honoo no Doukyuuji - Dodge Danpei

(UNI) Secret passwords (added 17.06.09):
HEBE-Cut scene test mode. You can select one of game cut scenes to play.

Honoo no Doukyuuji - Dodge Danpei 2

(UNI) Memory dump (added 30.07.13):
Any time during the game, press Up + Down + Left + Right + A + B + Select + Start both on controller 1 and controller 2 at the same time. This will dump the $0000-$01FF and $0400-$04FF areas to the SRAM and go to the infinite loop. Probably was used at the development stage to dump internal variables.

(UNI) SRAM clear (added 30.07.13):
Hold Left + Right on controller 2, then press Reset. The screen will be pure white. It will initialise the SRAM and then wait for the memory dump keys or do nothing.

(UNI) SRAM test (added 30.07.13):
Hold Up + Down on controller 2, then press Reset. The screen will be blue if SRAM is initialized with the first one cheat. Otherwise it will be red. Then programm will wait for the memory dump keys or do nothing.

Hook

(UNI) Credits and free map:
Press Right, Up, Up, Down, Down, Right, Left, Up at the title screen. A sound will confirm correct code entry. Now press Select to view the ending credits or start a new game and select destination on map, then press B to go there immediately without level completion.

(UNI) Soft reset (added 19.05.14):
Any time during the game, on controller 2 press Left + Select + Start to reset the game.

(BUR) Hidden text (added 13.11.08):
Most of the games programmed by Ocean shares the same music driver library all along with the hidden version and copyright string:
MUSIC DRIVER V1.0 (C)JONATHAN DUNN & OCEAN SOFTWARE


Hoshi no Kirby - Yume no Izumi no Monogatari, Kirby's Adventure

(UNI) Soft reset (added 01.08.13):
Hold A + B + Select + Start during the game.

Hoshi o Miru Hito

(BUR) Hidden text (added 23.11.08):
There is a hidden copyright text in ROM:
1987ANOTHERltd.1987. Another Ltd.


Hototogisu

(UNI) Disable music (added 20.05.14):
Hold A + B on controller 1, then press Reset. This will turn off the background music during the game.

(UNI) Skip to the intro (added 20.05.14):
Hold Left + A + Select + Start on controller 1, then press Reset, then release all the buttons. This will skips directly to the intro sequence.

(UNI) Repeat demo sequence (added 03.11.08):
At the title screen, when music is playing, wait for the demo sequence starts and over. When at the title screen again and the copyright logo appears on screen for a couple of seconds, quickly press Up, Up, Down, Down, Left, Right, Left, Right, B, A on controller 1 and demo sequence will start instatnly.

Hottaaman no Chitei Tanken

(UNI) Cheat commands (added 27.12.13):
At the title screen, enter one of the following cheat sequences, wait for the title screen start moving and press Start. After entering any cheat, you'll be returned to the title screen again. You can enter as many codes as you like, all effects are combined and will work at the same time. To start a new game with all enabled codes, just press Start while title screen is stand still and music is playing.
ALARBDUSU-Command menu. Show the complete cheats list with it's description. There is total 14 cheats available.
UALBRRAUD-Continue play.
LBRUADSRB-Stage Time Limit x2.
BRSALBDUD-No Jiminko enemy.
RDLASRAUB-No Magma.
DSRDAULBA-x2 Score.
BUDSADRBB-Laser Powerup.
UUBARBRAL-All items Equipped.
ALDRLBUSU-Bomb Powerup.
LBUDBLSRD-Infinite Bombs.
DBARSLRUD-Hottaaman Powerup.
RSDUBARRL-Hotsutaman +15 People.
BSRBLAUDL-Stage select.
URSDUADBL-???. If any of cheats 1-5 and 9-12 are enabled, you coulnd't see a password for the current level, this cheat seems removing that limitation.

Hu Lu Jin Gang (Nanjing, NJ039)

(UNI) Secret message (added 21.05.14):
During the game, while in conversation mode, hold Up + Select + Start on controller 1 and skip with A to the end of the dialog. The copyrigh string will be displayed in the dialog box, but the proper graphics or text was removed from this version of the game. This cheat can be found in a couple of Nanjing games on the same engine.

Huan Shi Lu (Nanjing, NJ034)

(UNI) Secret message (added 21.05.14):
During the game, while in conversation mode, hold Up + Select + Start on controller 1 and skip with A to the end of the dialog. The copyrigh string will be displayed in the dialog box, but the proper graphics or text was removed from this version of the game. This cheat can be found in a couple of Nanjing games on the same engine.

Huang Di

(UNI) Cheat mode (added 13.07.09):
At the "ASDER" logo, hold Down + Left + B + Select on controller 1, palette flashing will change. This will enable some debug features during the game. First of all, it's enabling "permanent flight" effect, when you can jump as high as you wish, just by pressing the "jump" button. Additionally, during the game press Up + B to increase your power state, which gives you more powerful weapon and an extra hit points.

Huang Jin Tai Yang (Nanjing)

(UNI) Secret message (added 21.05.14):
During the game, while in conversation mode, hold Up + Select + Start on controller 1 and skip with A to the end of the dialog. The copyrigh string will be displayed in the dialog box. This cheat can be found in a couple of Nanjing games on the same engine.

Hudson Hawk

All versions:

(UNI) Infinite lives:
At the title screen, press Up, Up, Left, Left, Right, Left, Down, Select, Select. The screen flashes and sound will confirm correct code entry.
Thanks Kitsune for corrections.

(BUR) Hidden text (added 13.11.08):
Most of the games programmed by Ocean shares the same music driver library all along with the hidden version and copyright string:
MUSIC DRIVER V1.0 (C)JONATHAN DUNN & OCEAN SOFTWARE


Japanese version:

(BUR) Hidden text (added 13.07.09):
There is a hidden version text in ROM:
* HUDSON  HAWK *
* SENT 30/9/91 *
* (TRANS) V2.4 *


(BUR) GameGenie (added 14.07.09):
AESAYEZE-Exchange the copyright screen text with the "Sony Imagesoft" logo screen unused in the Japanese version.
LESAYEZE-Exchange the copyright screen text with the "Ocean" logo screen unused in the Japanese version.

European version:

(BUR) Hidden text (added 13.07.09):
There is a hidden version text in ROM:
* HUDSON  HAWK *
* SENT 4/10/91 *
*  PAL  V0.1   *


(BUR) GameGenie (added 14.07.09):
AESEPELE-Exchange the "Ocean" logo with the "Sony Imagesoft" logo unused in the US version.

US version:

(BUR) Hidden text (added 13.07.09):
There is a hidden version text in ROM:
* HUDSON  HAWK *
*   28/10/91   *
* NEW STARTUP  *


(BUR) GameGenie (added 14.07.09):
LESEPEAE-Exchange the "Sony Imagesoft" logo with the "Ocean" logo unused in the US version.

Hudson's Adventure Island, Takahashi Meijin no Bouken Shima

(GEN) Continue (added 15.05.16):
First, collect the Hudson's bee at the end of level 1-1 inside the hidden egg. Now, at any Game Over or at the title screen, hold any D-Pad button before press Start to continue from the last played leve.

(BUR) Hidden text (added 14.07.09):
The RESET routine in this game uses string
HECTOR
to check if game was soft or hard reset.

Hudson's Adventure Island II, Takahashi Meijin no Bouken Shima II

(GEN) Level select:
At the title screen, wait until Higgins is hit by the coconut, then press Right, Left, Right, Left, A, B, A, B.

(BUR) GameGenie:
PPSZXXPE-Enable full featured Debug mode, tests everything in the game.
Source: BMF54123

Hudson's Adventure Island III, Takahashi Meijin no Bouken Shima III

(GEN) Level select:
At the title screen, press Down, Up, Left, Right, B, A, B, A.

Huge Insect

(UNI) Extra live (added 10.04.10):
Pause the game, press Up + Right + A + Select to increase lives counter by 1.

Hunt for Red October, The

(GEN) Double points:
Pause the game, press A, B, B, A, Right, Down, Up, Left, Left. The bottom of the screen will turn green. This code can only be used once per game.

(FIX) All weapons (added 06.01.08):
Pause the game, press A, B, Select, A, B, Select, A, B, Select, A, B, Select, A, B, Select, A, B, B, A. The bottom of the screen will turn green. This code can only be used once per game.

(GEN) Level skip:
Pause the game, press A, B, Select, Right, Left, Left, Right, Select, B, A, B, B, A. The level skips immediately. This code can only be used once per game.

(UNI) Invulnerability (added 06.01.08):
Pause the game, press Up, Down, Left, Right, Up, Down, Left, Right, Up, Down, Left, Right, Up, Down, Left, Right, A, A, A, B, B, B, Select, Select, Select, Right, Right, Right, Up, Up, Up, Down, Down, Down, Left, Left, Left, A, B, B, A. The bottom of the screen will turn green. This code can only be used once per game.

(GEN) Instant stop:
Pause the game, press Up, Down, Left, Right, Select. The bottom of the screen will turn green. This cheat triggers on/off each time you enter it.

(GEN) Slow automatic scrolling:
Pause the game, press Up, Down, Left, Right, Up, Down, Left, Right, Up, Down, Left, Right, A, B, B, A. The bottom of the screen will turn green. This cheat triggers on/off each time you enter it.

(GEN) Disable automatic scrolling:
Pause the game, press Up, Up, Down, Down, Left, Left, Right, Right. The bottom of the screen will turn green. This cheat triggers on/off each time you enter it.

(UNI) Music toggle (added 21.05.14):
Pause the game, press Select. The bottom of the screen will turn green for the REV0 version and won't change for the REV1 and European versions. Also the REV0 version only disables the music and doesn't allow to enable it back, but in the REV1 and European versions this was fixed and you can toggle the background music on/off any time.

(BUR) GameGenie (added 06.01.08):
AVVLVKUK (for the REV0 version)
XPEUUISY (for the REV1 and European versions)
-Replace the Music Toggle cheat with dummy cheat, which only turn the bottom of the screen in white.
ANVLVKUG (for the REV0 version)
XPEUUISN (for the REV1 and European versions)
-Replace the Music Toggle cheat with an Extra 99 lives cheat, which can be used once per game..

HVC Kensa Cassette Controller Test

(UNI) Hidden game (added 05.10.12):
Hold Down + B on controller 2, then press Reset. Press the button which marked by the program as fast as possible. Try to press all correct buttons.

Hydlide, Hydlide Special

Normal version:

(BUR) Hidden text (added 04.11.08):
The RESET routine in this game uses following text to check if game was soft or hard reset.
HYDLIDE
(C)1986 T&E SOFT
Programed by
      EIJI KATO
'85.11.13 - 1.10
 V1.0D '89. 1.12


Special version:

(BUR) Hidden text (added 04.11.08):
The RESET routine in this game uses following text to check if game was soft or hard reset.
 HYDLIDE SPECIAL
(C)1986 T&E SOFT
Programed by
     EIJI KATO
'85.11.13 - 1.10
Produced by
     TOEMI LAND


Hydlide 3 - Yami Kara no Houmonsha

(UNI) Sound test (added 04.11.08):
First you must complete the game. When the title screen appears again, select the "CONTINUE" option from the title menu and return to the Cemetery South-East of the game's starting point. You should be at least 7th level or should have INTELLECT at least 50th level to open the hidden passage leading to the Hidden Village. Just step before the grave in 5th column from left, and 2nd row from bottom. The secret passage will open. Enter the Hidden Village and head to the west, then step under the roof of HANGAR to the left from the INN. Menu with music titles will appear. Press any button to cycle through compositions, press B to exit.

Hyokkori Hyoutan Shima - Nazo no Kaizokusen

(FIX) Sound test (added 22.05.14):
This is a leftover from the development stage. Go to the password screen and on controller 2 press A to play music or sound and B to stop it. To select the sounds, change first two characters from the password string using the Up or Down on controller 1. The sound number can be calculated with equation 10*x+y-48, where, x - the first character from あ to た represents the valid numbers from 0 to 15, y - the second character represents the numbers from 0 to 64. Maximum sound index is 27. For example, enter the first two letters as "おけ", this will be first music track (index 10*4+8-48 is zero). Then, select the second character from the password string, press Down up to 27 times (the last valid letter is や). The first 11 numbers will be the songs, the next 17 are sound effects. The game will likely crash if you select more than this.
Source: ReyVGM

(GEN) Level skip:
During the game, in the puzzle/action levels, press Up + B on controller 2 to complete the current level instantly.
Source: ReyVGM

(BUR) GameGenie (added 22.05.14):
ELXIZTAZ-Enables the 18 disabled debug passwords to additional 18 stages of the game. Just enter the first letter of the password as a character between あ and つ.

Hyper Olympic, Hyper Sports, Hyper Olympic Genteiban!, Track & Field, Track & Field in Barcelona

(BUR) Hidden text (added 26.11.08):
There are hidden version strings can be found inside every different ROM of that game:
RC800 1,0 850325
-for the Japanese version (Olympic)
RC800 X,0 850919
-for the Japanese version (Olympic Genteiban!)
RC806 1,0 850601s
-for the Japanese version (Sports)
RD001 1,0 861220
-for the US version
MSTR911014
-for the European version

I Love Softball

(UNI) Easter egg (added 03.08.13):
Hold B on controller 2 and A on controller 1 at the same time, then press Reset. At the title screen, press Select + Start on controller 1. Now all the players will be in a swimsuits instead of the regular uniform.

Ice Hockey

(FIX) No goalie (added 30.12.13):
At the title screen, hold A + B on both controllers at the same time, then press Start on controller 1. This cheat could be combined with the next one to get two effects at the same time.

(FIX) Non-stop puck (added 30.12.13):
At the team selection screen, hold A + B on both controllers at the same time, then press Start on controller 1. This cheat could be combined with the previous one to get two effects at the same time.

Ide Yousuke Meijin no Jissen Mahjong

(BUR) GameGenie (added 03.08.13):
XVEUGLAV-Re-enables the special mahjong controller device debug display.

Ide Yousuke Meijin no Jissen Mahjong 2

(UNI) Secret passwords (added 03.08.13):
Enter as password in Story Mode:
いいてぶく ろいいようふく
いいはいが わたしはほしい
-Max Stats at Start
おかねほし いおかねほしい
これであな たもおかねもち
-200,000 Money, Max Stats, and All Equipment
おかねほし いもつとほしい
にじゆうま んぐらいほしい
-80,000 Money

Idol Shisen Mahjong, Tiles of Fate

Hacker version:

(UNI) Picture view and Level select (added 03.08.13):
At the stage number screen, press Select, A, B. The music will start playing. Press A or B to select the stage number from 1 to 21, press Start to view the stage's final image. Press Start to return back to the stage number screen, where you can now can play a selected stage or enter the cheat one more time and select another stage.

AVE version:

(UNI) Level select (added 23.05.14):
At the stage number screen, press Select, A, A, B, B, B, A, A, B, B, B, A, B, A, B. The different music will start playing. Press A or B to select the stage number up to 7-1, and press Start play it.

Ikari, Ikari Warriors

(GEN) Continue:
At the game over screen, press A, B, B, A. This also can be done on controller 2 at any time for a second player to enter the game.

(FIX) Level select:
At the title screen, quickly press Up, Down, A, A, B, Left, Right, A, B, Up, A, Down, Right, Right, Left, B, Up, Left, A, Right, B, Left, Right, A, Left, Up, A, Down, A, Right, Left, B, Start. The Level select menu will appear after the airplane landing.

Ikari II - Dogosoken, Ikari Warriors II - Victory Road

Japanese version:

(FIX) Continue (added 06.01.08):
After losing a game, but before the game over screen appears, press A, B, B, A, A, A, A, A, A, B. This also can be done on controller 2 at any time for a second player to enter the game and this code may not be enabled during the last level of the game.

US version:

(FIX) Continue (added 23.05.14):
The Continue cheat from the Japanese version was shortened in the US version to just four buttons, so the code here is A, B, B, A, the same as in the first part of that game.

Ikari III - The Rescue, Ikari III

(FIX) Continue (added 23.04.14):
During the game, in any game mode, press Up + Right + A on either controller 1 or controller 2 to bring corresponding player into the game. This can be done unlimited amount of times in both regional versions, but be careful, the Japanese version have only three continues if both players are dead, as against the US version, where you have unlimited continues even in this case.

(BUR) Hidden text (added 14.07.09):
The RESET routine in this game uses string
KISS
to check if game was soft or hard reset.

Ike Ike! Nekketsu Hockey Bu - Subette Koronde Dai Rantou

(UNI) Secret passwords (added 29.03.12):
7031-Sound test
4728-Harder scenario
Source: Johnny Undaunted

Ikinari Musician

(GEN) Chose color scheme:
At the title screen, press A, A, B, B, Right, Left, Select. If done right, the word "BOY" will appear on the top left of the screen. This word represent the current color scheme, now you can select three more color schemes for the game: "GIRL", "OLD" and "B/W TV".
Source: ReyVGM

(UNI) Musc speed select (added 30.12.13):
At the music board, put the cursor at the speed multiplier, then hold Down and press Start to set the music speed at half of the normal. Hold Up at any music board control and press Start to return speed back to normal.

(UNI) Different notes visualization (added 30.12.13):
At the music board there is three diferent notes visualization is available: by displaying the notes in notes window, with a bobbles of different colors popping up from the key cursor position and by displaying the rabbits in notes window. Modes can be selected with blue flashing button at the top-right. Select the bubbles mode (slow flashing blue bubble, once pressed), then hold Right then press Start to switch bubbles to alphabet letters.

Image Fight

(FIX) Level select:
At the title screen, hold A + B on both controllers at the same time and press Start.

(BUR) GameGenie (added 10.12.10):
PENNEYAA-Enables the invincibility cheat in the Level select cheat. After entering the Level select mode, and choosing desired level, hold Up on both controllers at the same time and press Start.

Immortal, The

(UNI) Password generator:
Hitpoints:
Level:
Power:
Inventory
 Usual:
 Special:
Gold:X10
Password:


Incredible Crash Dummies, The

(UNI) Level select:
Press Right, Right, Up, Left, Up, Right, Down, B, A, Select at the title screen. A sound will confirm correct code entry.

Indiana Jones and the Last Crusade (Taito)

(BUR) GameGenie (added 30.06.09):
ZKVPENUY-Enables a development stage funny easter message. There is some memory area that contain some critical game variables. For some reason the game calculates simple checksum for this area and then compares it with previously calculated value. In the final release, the wrong CRC causes rewriting of some wars with the default values. But there was message "You got a checksum error today, but that doesn't mean you have to like it!" that appears when CRC is wrong and then jump to the game ending. Seems this stuff was made to prevent from cheating for level select or some other parameters.
GEEAGOOZ-Enables some camera feature on tombs level when saving father. With this code camera behaviour is changing: it will move the same direction where D-Pad buttons is pressed - up, down, left or right. In final release there is only automatic from left to right camera movements left.

Indiana Jones and the Last Crusade (UBI Soft)

(UNI) Password generator (added 27.03.08):
Level:
Score:
Whip:
Gun:
Random1:
Random2:
Password:


Infiltrator

(FIX) Secret passwords:
NERV-Begin Flying mission 2
HOOT-Start at Enemy base 2
GUMP-Begin Flying mission 3
BOMB-Start at Enemy base 3

Insector X

(UNI) Secret message (added 14.07.09):
Enter to the "OPTION MODE" menu, move cursor to "EXIT" option then press Right 35 times and then press Left once. A message "PRGD. BY JYOJI HIRAYAMA" will appear.

(UNI) Level select and no hit mode (added 14.07.09):
Enter to the "OPTION MODE" menu, move cursor to "EXIT" option and press Left, then exit options menu and start the new game. At the "PLAYER SELECT" menu press Up to select level and Down to toggle between "HIT" and "NOT" options, which means normal mode and invincibility accordingly.

International Cricket

(UNI) Sound test (added 17.06.08):
Immediately after power on or right before it hold A + Select + Start on controller 2. Continue holding it while copyright screen is displayed. The cheat triggering depends on how long you holding these buttons. The whole time from power on to title screen will take $FA cycles, you need to hold mentioned combination not less than $E1 cycles. Then Sound Test mode will appear.

(UNI) Secret message (added 17.06.08):
Enter the "Sound test" mode as described above. Play any "Sample" (25-29). Select "Off" (0) then press Select, Select, Select on controller 2. Message "SUE ANDERSON: A GURU FOR THE NINTIES" appears.

(UNI) The Beam team (added 17.06.08):
Enter the "Sound test" mode as described above. Select "Off" (0) and press A ten times, slowly. A sound will confirm correct code entry. Press Start to back to the game. From now you can choose hidden 9th team with name "The Beam Team" in any mode with team selection menu. Beam team have funny names for players and all team are green-skinned, like tru programmers. ;)

(UNI) Screwed delivery (added 17.06.08):
Enter the "Sound test" mode as described above. Select "Theme" with number 10 and press A ten times. After tenth pressing music will stop confirms correct code enty. Press Start to back to the game. Now you can choose extra delivery method with highly screwed ball. On delivery selection screen hold Down to choose "Short" delivery and press A or B to select fast or medium bowler. Instead of short delivery you will be able to throw uncatchable ball.

Ironsword - Wizards & Warriors II

(UNI) Extra 255 continue:
At the title screen, hold Up on both controllers, then press Start on controller 1.

(UNI) Bonus chance cheat:
At the title screen, hold Up + B + Select then press Start on controller 1. You can play in bonus chance game at any shop without loosing, because of known game behavior. The skull will fall into the cups in the following order: 1, 4, 3, 2, 1, 4, 3, 2, etc. So you can win 12000 gold.

Isaki Shuugorou no Keiba Hisshou Gaku

(GEN) Sound test:
Hold A + B on controller 2 and press Start on controller 1.
Source: ReyVGM

Isolated Warrior, Max Warrior - Wakusei Kaigenrei

(UNI) Secret passwords:
Using any of these passwords will lock you out of stage 7 (continue flag $06C8=01).
6502-Full HP and bombs
6285-Full weapon power
6666-1 HP
5350-Invalid, no effect (password routine bug; should stop checking at 6666)
Source: BMF54123

(BUR) Debug flags:
RAM address $06D7 activates two debugging features: Invincibility (01) or Full weapon power (permanent) and level 5 bombs (reset between lives) (02), or both (03). No code in the ROM ever writes to this address.
Source: BMF54123

(BUR) Sound test:
Totally disabled, only text left.
00015F20: 9F AA 68 29 0F A8 B9 1A 9F 60 20 21 22 23 24 25 ...iO..Z..`abcde
00015F30: 26 27 28 29 01 02 03 04 05 06 21 0B 0A 13 0F 15 fghiABCDEFaKJSOU
00015F40: 0E 04 00 14 05 13 14 21 8C 06 02 07 0D 00 0E 0F ND@TESTa.FBGM@NO


Itadaki Street - Watashi no Mise ni Yottette

(UNI) Sound test (added 09.12.08):
At the title screen, hold Up + Select then press Start. Screen with copyright message "all songs written by t.ueno programmed by ohmorita" will appears. Each song has it's name.

(GEN) Turbo file operations (added 09.12.08):
At the title screen hold A then press Start. You will be able to manage Turbo File devise to save and load progress.

(BUR) Hidden text (added 09.12.08):
There is some hidden copyright text in ROM:
Prog. By FukashiCreamSoft.


Ivan Ironman Stewart's Super Off-Road, Super Off-Road

(BUR) Hidden text (added 09.12.08):
There is some hidden copyright text in ROM:
* Conversion by Paul Machacek for RARE LTD *


JJ - Tobidase Daisakusen Part 2, 3-D Battles of World Runner, The

All versions:

(GEN) Continue:
After your game has ended, push Up + A or Down + A.

(GEN) Hard mode:
At the title screen, press Start, then when the "PRESS START TO BEGIN" message is displaying, press B, B, B, B then hold Up + Left and press Start on controller 1. In this mode, all enemies are movig faster. This cheat is unlockable, and revealed if you beat the game once.

Japanese version:

(BUR) GameGenie (added 03.08.13):
AAEAGENY-Re-enables 3D-mode selection cheat. By default in the Japanese cartridge version, 3D-mode was forced to single colored left/right frames. With this code you can press hold Select at the title screen then press Start to switch 3D-mode to the red/green colored frames mode, just like in the FDS version.

US version:

(BUR) GameGenie (added 03.02.14):
NYEAGAAE-Re-enables 3D-mode selection cheat. By default in the US version, 3D-mode was forced to red/green colored left/right frames, the same as for the FDS version. With this code you can press hold Select at the title screen then press Start to switch 3D-mode to the single colored frames mode, like in the Japanese cartridge version.
OZEEAAAV-Re-enables the disabled starting copyright screen, which is a copy of the FDS games disclaimer, but for Famicom Computer. The same screen is present in the Japanese version, but it was much more more damaged, but still can work with more patching.

Jackal

(FIX) Borrow life (added 31.12.13):
During two-player mode, when one of the players run out of lives and the "GAME OVER" message is displaying, press on the corresponding controller A + B, you'll borrow a spare life from another player if any.

Jackie Chan, Jackie Chan's Action Kung Fu

(FIX) Level select:
At the title screen, press Up, Up, Down, Down, Up, Down, B, A, Start.

(FIX) Extra 99 continue:
Enter the Level Select mode and press B on controller 2.

Jajamaru Gekimaden - Maboroshi no Kinmajou

(GEN) Refill HP:
At the very end of the game, enter the village by the sea (use the secret name trick to reach the final boss, loose and you'll appear at exactly needed village), reach the 4th screen of the town and enter the lower-left house (it should be empty). Once inside, press A, Up, Up, Down, Right, B, Down, Left, Right, Left on controller 2. Leave the house and come back in again. If done right, there will be a couple of kids ready to refill your HP.
Source: ReyVGM

(GEN) Refill MP:
At the very end of the game, enter the village by the sea (use the secret name trick to reach the final boss, loose and you'll appear at exactly needed village), reach the 4th screen of the town and enter the lower-left house (it should be empty). Once inside, press Down, Down, Up, Up, Right, Left, A, Right, B, Left on controller 2. Leave the house and come back in again. If done right, there will be a bird ready to refill your MP.
Source: ReyVGM

(UNI) Sound test (added 03.01.14):
At the very end of the game, enter the village by the sea (use the secret name trick to reach the final boss, loose and you'll appear at exactly needed village), reach the 4th screen of the town and enter the lower-left house (it should be empty). Once inside, press Up, Down, Up, Down, B, Left, Right, Right, Left on controller 2. Leave the house and come back in again. If done right, there will be a blue ninja, when you press A on it, the bacgroung music will change, cycling throught all game music.

(UNI) Secret words (added 03.01.14):
Enter one of the following words as a player name during new save slot creation. Any slot can be selected. Additionally, for all names except for the first one, B on controller 2 should be held before the intro sequence is over. Note, that some names starts with the space character denoted as "_" in following table.
_かわいい_たくらみ-The final battle. No matter if you win it of loose, when you return back to the map, the game will over and you can see the ending.Info from ReyVGM
みこちゃん-Infinite items.
しのふ゛をち-Infinite items.
し゛ゅんちゃん-Debug name, gives to you an infinite items and your weapon will be all powered up. Also, allows you to skip action levels on map, just hold B and move through the map. Additionally this cheat allows you to see all game locations. Enter the map mode, press Select. The number in the middle of HUD will display current location index. Press Up or Down to change it, press A to apply changes, now the number will display current sublocation index. Change it the same way, press A to advance to selected location. Unfortunately, the screen won't update automatically, in order to see the new location, enter the game menu and return back. Be careful, some indexes aren't correct and can hang the game or you couldn't exit it at all.
ひめりん-Infinite items and your weapon will be all powered up. Also, allows you to skip action levels on map, just hold B and move through the map.Info from ReyVGM

Jajamaru Ninpou Chou, Taro's Quest (Prototype)

Prototype version:

(UNI) Scenario warp (added 06.03.15):
Start a new game. During the intro breifing, hold B on controller 2 to start with Hanna from second part of scenario. In the Japanese version ths can be done with simple scenario selection at the game start.

James Bond Jr

(FIX) Secret passwords:
012345-Sound test
888888-View credits
181287-Unlimited bullets, 99 lives, 99 mins
170167-Easy enemies
200888-Silly hard enemies

(BUR) Hidden text (added 09.12.08):
There is some hidden copyright text in ROM:
(C) COPYRIGHT 1990/91/92 EUROCOM ENTERTAINMENT
Also the RESET routine uses this string to check if the game was soft or hard reset
euro!


Jangou

(UNI) SRAM clear (added 28.05.14):
Hold Up + Start, before the title screen appears, or just press Reset.

(UNI) Pause mode (added 29.05.14):
Hold B + Start, before the title screen appears, or just press Reset. In this mode, all players can make the moves, only after any button is pressed by the player, so you have a lot of time to think during game.

(BUR) GameGenie (added 29.05.14):
GAONZNSE-Re-enables the Autoplay mode cheat. Hold A + Start, before the title screen appears, or just press Reset. Your side will be CPU controlled, just watch the game. Unfortunately, the AI for the play is very weak, so it couldn't win most of the time.

Jarinko Chie - Bakudan Musume no Shiawase Sagashi

(UNI) Disabled cheat:
Press Up, Up, Down, Down, Left, Right, Left, Right, B, A at the title screen, a sound will confirm correct code entry. Does nothing.

Jaws

(UNI) Sound test (added 20.05.11):
Hold Up + Left + B on controller 2, then press Reset. At the title screen, on controller 1 press Left/Right to increase/decrease sample index by 1, press Up/Down to increase/decrease sample index by $10. Press A to play sample, press B to stop playing.

(UNI) Cheat mode (added 20.05.11):
Enter the Sound test cheat. During the game, enter pause mode, then hold one of the following buttons on controller 2 and exit pause mode to get corresponding effects:
A-For the map mode: enter "You've hit Jaws!" instantly.
For the diving mode: exit diving instantly.
B-For the map mode: enter "You've hit something!" instantly.
For the diving mode: kill Jaws instantly and go to the boss fight.
A + B-For the diving mode only: get extra 9 lives.

(BUR) Hidden text (added 20.05.11):
There is some hidden copyright text in the ROM:
(c)1987 LJN TOYS,INC.
TM&(c)1987 UNIVERSAL CITY STUDIOS,INC. ALL RIGHTS RESERVED.
LICENSED BY MERCHANDISING CORPORATION OF AMERICA,INC.
LICENSED BY NINTENDO OF AMERICA,INC.


Jesus - Kyoufu no Bio Monster

(UNI) Secret passwords (added 15.07.09):
ふあみこん せいさくの なかまたち みせてくれ-Secret staff message. First, a normal staff roll appears, then a secret staff roll will be displayed.
もつくんは わかままて れいさろん ひきたかる-Piano mini game. You can play simple melodies by pressing piano keys.
はいもとの えみさんへ とくさんの よめにこい-The same as previous, but with extra palette edit mode.
たくりんは おんかくか ききたいと ないてるし-Sound test with pictures. Each melody assigned to according game picture and have name in Japanese.
さりゆくも のたちきら めくひとみ そらのはて-The same as previous.

Jetsons, The - Cogswell's Caper!

US version:

(BUR) GameGnie:
VOOOGONU-Enables Level select screen after pressing Start at the title screen. CHRSET don't work, because using missing code parts at address $6000 that game in final release didn't using.
Source: BMF54123

Japanese version:

(BUR) GameGnie:
UXXOPOKK-Enables Level select screen after pressing Start at the title screen. CHRSET don't work, because using missing code parts at address $6000 that game in final release didn't using.

Jia A Fung Yun (Waixing)

(UNI) Hidden credits (added 30.05.14):
At the title screen, press A, B, Up, Down, A, A, B, Start.

Jigoku Gokuraku Maru, Kabuki - Quantum Fighter

All versions:

(GEN) Sound test:
Complete the game, then after the Credits have rolled, hit B.

(GEN) Chip swap:
During boss fight, press Start to pause the game, then press Up or Down to convert your chips into HP or HP into chips accordingly.

(UNI) Level select:
At the title screen, on controller 2 press A 8 times, B 4 times, Right 16 times, then press Start. This also activates a debug mode of sorts. During the game play, Up and Down on controller 2 can be used to alter the player's chip levels, and pressing A on controller 2 will skip the level.
Source: BMF54123

US version:

(UNI) Sound test (added 30.05.14):
Additionally to the ending screen, the Sound Test mode can be enabled at the game start. At the HAL logo, when animation stops, press Down + B + Select.

Jikuu Yuuden - Debias

(UNI) Secret passwords (added 04.03.13):
ふりきちすとoけoつぬつらえもすはひりはへoよくすはひりむけつ゛-Debug Mode.

Jin Yong Qun Xia Zhuan - Shu Jian Jiang Shan (Nanjing, NJ031)

(UNI) Secret message (added 21.05.14):
During the game, while in conversation mode, hold Up + Select + Start on controller 1 and skip with A to the end of the dialog. The copyrigh string will be displayed in the dialog box. This cheat can be found in a couple of Nanjing games on the same engine.

Jimmy Connor's Tennis

US version:

(BUR) Hidden text (added 16.07.09):
NTSC Version
Jimmy Connors Tennis for the N.E.S.
Built Friday 19th March 1993.
(c) Copyright UBI Soft 1993.


European version:

(BUR) Hidden text (added 16.07.09):
PAL Version
Jimmy Connors Tennis for the N.E.S.
Built Wednesday 17th February 1993.
(c) Copyright UBI Soft 1993.


Jing Ke Xin Zhuan

(UNI) Soft reset (added 02.06.14):
During the game, press Select + Start.

(UNI) Maximum stats (added 03.08.13):
At the title screen, press Down, Down, A, Up, Up, B, Left, Right, Select. Now, very time you press A during the game play, you'll renew HP/MP and exp parameters at its maximum.

(UNI) Debug cheat (added 03.08.13):
During the game, press Select, Select, B, Right, Right, Select, a sound will confirm correct code entry. You can now free walk on any maps, as well this will disable the random encounters. Press Start to disable this cheat back or press B, B, B to warp directly to the end of the game (the clothes will change and your wife is coming).

(UNI) Instant kill (added 02.06.14):
During the fight sequences, press Down, Up, Up, Down, Left, Left. Now press Select to instantly kill your enemy.

Jongbou

(GEN) Continue (added 04.08.13):
At the title screen after the game over, press Down, Up, Left, Right, Start.
Source: ReyVGM

Journey to Silius, Raf World

(GEN) Sound test and Extra 9 continue:
Press B 33 times then Start at the title screen. A sound test option will be available. Additionally, nine continues will be available when game play begins.

(BUR) GameGenie:
XTUSKTAV-Activates the game's stage select. A or B changes the starting level, and Start starts the game.
TEXINTIA-Additionally enables final boss selection at stage select screen.
Source: Chris Covell

Journey to the West (Micro Genius)

(UNI) Invulnerability (added 02.06.14):
At the title screen, press Select, Up, Select, Down, Select, Left, Select, A.

(UNI) Ending sequence (added 02.06.14):
At the title screen, press Select, Up, Select, Down, Select, Left, Select, B and start a new game.

(UNI) Stage select (added 02.06.14):
At the title screen, press Select, Up, Select, Down, Select, Left, Select, Right.

Joust

US version:

(BUR) Hidden text (added 27.11.08):
The RESET routine in this game uses string
MIYA AOKI
to check if game was soft or hard reset.

Jovial Race

(UNI) Extra 29 lives:
At the title screen, after two car crashes, press A, B, Up, Down, Up, Down, B, A, then any other button except A and Start.

(UNI) Stage select (added 02.06.14):
At the title menu, press Up, A, Down, A, Left, B, Down, A, Right, A, Left, B, A, then any other button except A and Start. Press A or B to change the stage number by 5 up to 46.

Joy Mech Fight

(GEN) Secret fighters (added 04.08.13):
Select any game mode at the main game menu, except "1P Quest", and press A + B + Select + Start at the same time.

(GEN) Sound test (added 04.01.14):
At the title screen, press B + Select.

JuJu Densetsu, Toki

(BUR) GameGenie (added 26.12.08):
PEKYVYAA-Enables debug mode. Invulnerability is enabled, level select is enabled. To select level press A on player select menu. During game, press Start to pause it, hold Select and press A to skip current stage, or press B to commit suicide.

Jumbo Ozaki no Hole in One Professional

(UNI) Twice strike power (added 04.08.13):
During the game, press B to select the close view of the hole. Hold Up + Left on controller 1, then press Down + Right on controller 2 a small number will appear to the left of the player character. A Number "2" means the cheat is on, "1" means the cheat if off. If enabled, every time you beat the ball, it will fly a lot more farther than usual, due to strike power increased twice.

Jumpin' Kid - Jack to Mame no Ki Monogatari

(BUR) GameGenie (added 03.06.14):
PASVEZAA-Re-enables the invulnerability cheat. At the title screen, press Up + Select.

Jungle Book, The

(GEN) Cheat mode:
At the options screen, in the sound test option, play songs in following order: 40, 30, 20, 19, 18, 17, 16, 15.

Jurassic Park

(FIX) Level skip:
At the title screen, press Down, Right, Left, Down, Right, Left, Down, Right, Left, Down, Right, Left. A sound will confirm correct code entry. Pause the game and press Select to skip the level.

(BUR) Hidden text (added 13.11.08):
Most of the games programmed by Ocean shares the same music driver library all along with the hidden version and copyright string:
MUSIC DRIVER V1.0 (C)JONATHAN DUNN & OCEAN SOFTWARE


Just Breed

(BUR) GameGenie (added 09.07.14):
XTKKTPAV-Re-enables the debug features. Any time during the game, press Select + Start to pause it. Press Up + Select to enable the Sound test menu.

Juuouki

(FIX) Debug mode:
Hold Down then press Reset. This will increase the continue counter to 255. While there are more than 3 continues left, the "FREE PLAY" text will be displayed on the title screen. This means you can select any stage to play with press Select at the title screen. Also, at the title screen, press Up + Start to trigger a sound test. Every time you dies, the continue is decreased. After the first game over, a sound test is disabled. When the counter is dropped to 3, the game will return to the normal continue mode.
Source: ReyVGM

Juuryoku Soukou Metal Storm, Metal Storm

(UNI) Gravity switch control (added 04.06.14):
During the game, hold Select then press Start, Start to toggle between two modes of the gravity control switch. In the first mode, you need to press D-Pad in the same direction you want to switch gravity. In the second mode, you need to press D-Pad in the opposite direction.

(BUR) GameGenie:
SNKEPULO+OOKEZLVP (for the US version)-Re-enables intro movie.
YASNUKZA (for the US version)
YAKNNKZA (for the Japanese version)
-Enables a level and powerup select mode.
Source: BMF54123

Juvei Quest

(BUR) GameGenie (added 04.08.13):
PAEGAAAA-Partially re-enables some debug functionality. Press A + Select to frame advance, press B + Select to unknown effect, press B + Start at the world map to force random encounter to appear. There are more options, but since there aren't proper data banks and code, they don't work.

Kaettekita! Gunjin Shougi - Nanya Sore!

(FIX) Secret passwords (added 04.06.14):
おんかく-Sound test
すしくいねなんやそれ-A secret map.
Source: ReyVGM

(FIX) Credits:
At the title screen, hold A + B on controller 2 and press A or Start on controller 1 or wait for the demo sequence is started.
Source: ReyVGM

(UNI) Manual debug display (added 04.06.14):
At the title screen, highlight the "1PLAY" option, then hold Right + A + B on controller 2 and press A or Start on controller 1 or wait for the demo sequence is started. During single player game or the demo sequence, a small number will be displayed at the center of the screen before enemy's turn, representing some enemy's parameters. Also, hold B on controller 2, then press B on controller 1 to switch on or off the enemy's names.

(UNI) Auto debug display (added 04.06.14):
Do the same as for Manual debug display cheat, but additionally hold B before press A, or hold A + B before press Start or before the demo sequence is start. Before every player's turn the names of the enemies will be switched on automatically and switched off before the enemy's turn as well. The small number appears the same.

Kage no Densetsu, Legend of Kage, The

(FIX) Extra 10 lives:
Hold A + B + Select + Start on controller 1 and A + B on controller 2 then press Reset. Release the buttons while the title screen is moving, then press A on controller 1 and B on controller 2 at the same time.

Kagerou Densetsu

(GEN) No random encounters:
Hold B on controller 2, while walking on the world map.
Source: ReyVGM

(GEN) Trigger Fights:
To manually trigger fights while on the world map, press:
A + Start-The enemy will be moving
A + Select-The enemy will be standing still
Source: ReyVGM

(GEN) Fight the bosses:
While on the world map, hold the following buttons on controller 2 and press Start (enemy will be moving) or Select (enemy will be standing still) on controller 1 to start the fight.
B-Earth Boss
Right-Fire Boss
A-Water Boss
A + B-Wild Boss
Source: ReyVGM

(GEN) Revive a character:
Open the menu on the world map, hold Up + A on controller 2 and select a fallen character with controller 1.
Source: ReyVGM

(GEN) Free walk:
Hold A on controller 2, while walking on the world map.
Source: ReyVGM

(UNI) Full equip (added 04.01.14):
Open the menu on the world map, put the cursor over the "CHARACTER" option, then hold Down + B on controller 2 and Up on controller 1 then press on controller 1 A.

(UNI) RAM test (added 27.10.07):
Hold Up + Down + Left + Right on controller 2 and press Reset, screen will be blue, then press A. The program is testing for $7F80=$55, $7FFF=$AA and all data between these addresses are zero. If all ok , the screen will flash with green screen and game continue as usual, if not, screen will be red and game will freeze. Similar tests can be found is some Taito games with specific mappers. Why this game uses the same type of tests is unknown.

Kaiketsu Yanchamaru, Kid Niki - Radical Ninja

(FIX) Secret bonus stages (added 05.06.14):
There are a lot of secret places during the game where you can find some bonuses or get a shortcut, usually two for each level, but some of them can't be opened together. Each secret place needs it's own unique method to open. Here is the complete list.
Round 1-9-Stop right on the starting point of the round 1-9, on the right side of the ledge, mash your sword to the left, then to the right. There are some enemies, exit is at round 1-11, you still can access the bonus at round 1-10, if die here, then you continue right from round 1-9.
Round 1-10-Stand in front of the water mill, crouch, jump, mash sword to the right, then to the left. A bonus room with falling coins and scrolls will appear. Exit is at the same place.
Round 2-6-Climb on the very first three in round 2-6, up to the top. Mash your sword in a small room to reveal hidden scrolls. Exit, and a bird will take you to the beginning of round 2-9.
Round 2-10-Stand in front of the second pillar, from the beginning of round 2-10. Jump once, then two times jump and mash your sword mid-air. It's a very short shortcut to round 2-11.
Round 3-4-Near the beginning of round 3-4, there is a cliff side and a cloud on the lower level. Jump down to the cloud, then jump up back to the cliff side. Repeat this two more times. Use your weapon in the small cave to reveal hidden scrolls. Exit is at the same place.
Round 3-8-Jump to the floating cloud at the very beginning of round 3-8, jump three times on it, when the cloud is in the topmost position. This shourtcut brings you to round 3-10.
Round 4-1-Right at the start of the round 4, jump to the left, to the middle of the rock and crouch there for a 4 seconds. This is the best shortcut in the game, brings you to round 4-8, avoiding very annoying frogs.
Round 4-11-At the beginning of round 4-11, jump to the first solid rock and jump on it three times. A fish head will appear instead of second solid rock to the right, jump to its mouth. Shourtcut leads to round 4-12 through the fish ass.
Round 5-5-Crouch for a 3 seconds under the second window, from the beginning of round 5-5. There is another falling prizes room. Exit is at the same place.
Round 5-12-Reach the Buddha statue near the end of level. Crouch in the middle of the statue, right under the belly, for a 3 seconds, and then shout in famicom's microphone at controller 2. This secret is the same for both the Japanese version and the US version, but you can't enter it on the NES due the lack of the microphone. Exit is at the same place.
Round 6-4-At the very beginning of round 6-4, jump to the right side of the water pond, and walk into the water to the left. Exit is at round 6-7.
Round 6-9-Near the beginning of round 6-9, stand at the rightmost corner of the roof. Jump right in a small cavity, stand at the rightmost corner of the cavity and jump up once, jump back to the roof. Repeat this four times. Exit is at the same place.
Round 7-3-There are a six doors with the tiger picture on it in rounds 7-3 to 7-5. Crouch for a 3 seconds at first 5 doors to access a different secret rooms. In the first door, there is another room with falling prizes, and jumping maneki-neko, which very annoying. The second door contains the whole Buddha statue, which gives you a present in the left hand. The third door contains a room with five scrolls, with word "ハズレ" (which means "FAIL" for some reason) written on them. The fourth and fifth doors are similar and leads to the rooms with some scrolls floating in air. All five rooms moves you to round 7-6, so you couldn't acces all them at once.

Kaiketsu Yanchamaru 2 - Karakuri Land

(UNI) Sound test:
At the title screen, press B + Select.

Kaiketsu Yanchamaru 3 - Taiketsu! Zouringen

(GEN) Stage select:
At the title screen, hold A + B on controller 2 and press Start on controller 1. Use A or B to select and Start to start the game on the desired level.
Source: ReyVGM

Kame no Ongaeshi - Urashima Densetsu, Xexyz

(FIX) Secret passwords (added 11.02.16):
E3D3D 3D3DF-Start at Area 12-4 (the final boss) with best weapon power and type and 50 balls.
A2A4A 6A8A0-Play even levels only (flight type with bosses) up to 10, then play levels 11 and 12 in regular way. Start with no weapons and 50 balls. This password is unlockable in the US version.
BBA13 57912-Play odd levels bosses only. Start with best weapon, but minimum weapon power and 50 balls. This password is unlockable in the US version.
**135 79BD*-Start at Area 12-4 (the final boss) with best weapon power and type, 800 balls and invulnerability. Note, doesn't enter any letters in positions denoted with *, use B to skip to the third letter.

(UNI) Full power and speed in even levels (added 11.02.16):
At the beginning of the flight levels with bosses (areas 2-1, 4-1, etc.), there is a little pause before you start to play, when you just sit on the entry door for a couple of seconds. During this time, hold Select, then quickly press Up, Down, Right, Left. If done correctly, you'll obtain a maximum power and speed instantly.

Kamen Rider Club

(BUR) GameGenie (added 27.03.12):
PENNEYAA-Enables debug features. During the game on controller 1 press Start, then press Up to increase money count, press Start to skip current level, press A to instantly jump to the battle mode. During battle press A on controller 2 to exit battle mode.

Kamen Rider SD - Guranshokkaa no Yabou

(UNI) Ending sequence (added 05.08.13):
Hold Right + B, then press Reset.

Kamen no Ninja - Akakage

(BUR) GameGenie (added 05.08.13):
EANGZAAA-Re-enables the all items and map cheat. At the title screen hold Left then press Start.
AGVGYAAA-Re-enables the invincibility cheat. At the title screen hold Right then press Start.

Karaoke Studio, Karaoke Studio Senyou Cassette Vol 1, Karaoke Studio Senyou Cassette Vol 2

(UNI) Microphone test (added 05.08.13):
Hold A + B on controller 2, then press Reset. Press A on controller 1 to hear a tone, press B to change the screen color.

Karate Champ

(BUR) Disabled cheat (added 11.09.08):
There is some old cheat left in the final version. When the title screen appears from the bottom of the screen, and before it stops, you must press Up, Right, Down, Left, Down, Right, Up, Left, A, B sequence and then press A to increase some internal counter up to 99. There is no so much time to enter thhis cheat and increase counter turing the title screen animation. In the final version memory areas for storing key sequence and for checking this sequence is different so it isn't possible to trigger cheat. Anyway, cheat counter don't reading at all in game, so it absolutely unuseful. It may be used as default round time counter. $50, $51 vars are counter in decimal notation, $4F main cheat flag, $53-$5C sequence check area, $52 - sequence length variable. $AD-$B6 - sequence store area, $AC - sequence length var (uninitialized by default, may be any index in zero memory).

Karnov

All versions:

(GEN) Level select:
At the title screen, hold Right + A + B + Select on controller 1, then press A on controller 2 once for each level to be skipped. Finally, press Start on controller 1 to begin game play. Note: This may only be done up to level 9.

(GEN) Suicide:
During game, press A + B on controller 2.

Japanese version:

(GEN) Continue:
At the game over screen, press Select + Start% on controller 1. This may only be done three times.

US version:

(BUR) GameGenie (added 11.06.14):
AAKITAZA-Re-enables the intro animation from the Japanese version. The text isn't translated, but font is changed, so it's unreadable.
ANXSYAYX-Use this code in addition to the previous one to replace the intro sequence with also removed ending sequence. The different ending can be seen if run this sequence after boot or gameplay.

Kero Kero Keroppi no Daibouken

(BUR) Hidden text:
There is some copyright text inside the ROM:
T.Ueno&F.Omorita


Kero Kero Keroppi no Daibouken 2 - Donuts Ike ha Oosawagi!

(UNI) Level select (added 26.11.13):
At the title screen, hold Select, then press Up, Up, Down, Right. A sound will confirm correct code entry, also the "PUSH START BUTTON" message will turns green. Now during the game, press Start to pause the game, press A to increase level number up to 13 or B to decrease level number. Unpause the game to jump straight to the selected level.

Keroppi to Keroriinu no Splash Bomb!

(UNI) Secret passwords (added 29.03.12):
さうんと゛をきく-Sound test
らすとた゛けみる-Ending Sequence
れいくんけ゛えむ-Rei-kun Game. Hold any of following buttons or its combinations on controller 2: A or B or Up or Left, before entering this password to enable some kind of paper-scissors-rock mini-game.

Kick Master

(UNI) Password generator:
Level:
Sector:
Lives: note: 0=3
Quest:
Magic:

Random:
Password:


(UNI) Secret passwords:
K!N!!! L!BB!?-Debug room
L!W!!G !M!N!?-Enable player's level selecting. Just press B at Spell selecting screen.

Kickle Cubicle, Meikyuu Shima

All versions:

(GEN) Sound test:
Hold A + B on controller 2 and press Reset.

(GEN) Kid Niki easter:
At the title screen, before the title menu appears, hold A on controller 2 and wait until it appear.

US version:

(FIX) Debug leftovers (added 16.06.14):
Hold Down on controller 1 and press Reset. The screen will turn white and will wait for additional input. Press one of the following buttons for corresponding effects.
Start on controller 1-Jump to the beginning of the regular game. The code is able to run the game from the beginning of one of the three lands, but there is no land selection routines left. So you can start only from the beginning.
Select on controller 1-Jump to the special game.
B on controller 2-The same as the Sound Test cheat.
Up on controller 2-Boss test mode. The same land selection routine, which isn't present in this version of the game, should've allow you to test any of three game's bosses. With the current code you can fight just the first one and see the corresponding cutscene if you win. If you loose, you'll returned in the debug mode back.

Japanese version:

(BUR) GameGenie (added 16.06.14):
GAOATEGK-Re-enables the debug leftovers from the US version. Just reset the game. This routine is mostly the same as in the US version, only the screen color will turn pink and if you press Start, you'll jump to the main game title, since there is no more code for selecting the starting level anymore.

Kid Icarus

(UNI) Password generator (added 04.01.14):
Bits:
















Password:


Kid Klown, Mickey Mouse 3 - Yume Fuusen, Mickey Mouse - Dream Balloon (Prototype)

(GEN) Hard mode:
At the title screen, press Up, Up, Down, Down, Left, Right, Left, Right, B, A. This code is unlockable after you beat the game on the normal difficulty.

King Kong 2 - Ikari no Megaton Punch

(GEN) Continue:
At the game over screen, press B, A, Start.

(UNI) Level select:
At the title screen, press Right, Left, Right, Left, B, A, Up, Down, Up, Down, then press any other button before pressing Start. During the game you can press A on controller 2 to switch level or B to hold a game.

(UNI) Secret message (added 03.06.12):
After beating the game, when THE "STAFF" roll is about to over, before messages "PRESS START BUTTON" and "PLAY TIME" appears, hold A + B. Another message appears, depending of how much hours in total you've played. There are total 24 messages:
0 Hours-KIMI WA TENSAIDA 573
1 Hours-NAKANAKA NO MONDA 291
2 Hours-TAMANI WA KYUKEIO 999
3 Hours-YOKU KOKOMADE KORETANO 450
4 Hours-GOKUROUSAN 5963
5 Hours-6 JIKANMO SURUTOWA 606
6 Hours-7 JIKANMO YATSUTANOKA 778
7 Hours-YATSUPARI TENSAI...444
8 Hours-KURUSHIKUTEMO GAMAN 964
9 Hours-KIMI WA ERAI 747
10 Hours-KONO JIKAN OBENGAKUNI 555
11 Hours-HAYAKU NENASAI 889
12 Hours-TADAMONO DEWA NAINA 046
13 Hours-MOU 14 JIKAN 140
14 Hours-SHIKUDAI YATSUTAKANA 498
15 Hours-KONG WA SAIKOU 7777
16 Hours-KING KONG WA OMOSHIROI 321
17 Hours-ICHIKA BACHIKA OWARINA 180
18 Hours-KONG WA KIMIGA SUKIDA 375
19 Hours-HA-A 8080
20 Hours-TENSAI WA KUSAI 931
21 Hours-IMA WA NANJI DAROU
22 Hours-ATO 1 JIKANDE 1 NICHI 1111
23 Hours-KIMIMO SHITSUKOINA 4517

(UNI) CRC test (added 25.04.07):
Hold A + B, then press Reset. A "KINGKONG" string stands for the PRG ROM checking, a "KONAMI" string stands for the CHR ROM checking. "ONE" means test is OK, "TEN" means test has failed.

(BUR) Hidden text (added 03.06.12):
There are some unused text strings previously used for some menus or messages still in the ROm. First one is a mising STAFF person name, that doesn't appears in the final STAFF roll: "SHIMONETA KENJI". Second one, is a presumably strings from the old version of the title screen: "PLAY SELECT", "KONAMI 1986", "PUSH START BUTTAN". Third one, totally removed password screen texts: "KEY WORD", "END...PUSH A BUTTAN", "KEY WORD ERROR". And finally, at the beginning of the RESET routine, a version string placeholder appears: "RCxxx 1.0 .date.".

King Neptune's Adventure

(UNI) Cheat mode (added 30.11.13):
During the game, hold Up + A on controller 1 and Up on controller 2 then press B on controller 1. From now, bubble bombs will be unlimited. Additionally hold B, then press Select to skip current level. Hold A, then press Select to enable unlimited lives.

King of Fighters 96

(UNI) JY company's Easter egg:
At the title screen, press Down, Down, Left, Up, Right, Left, Up, Down.

King of Kings

(UNI) Secret words (added 07.10.08):
At the game save screen select 4th slot, then enter as name "オオタニ トモコ" (Ootani Tomoko) or "アヘ゛ ヒロミ" (Abe Hiromi) then before entering "オワリ" option hold A or B or both on controller 2. Name of save record will be now "ILOVEYOU".

(BUR) GameGenie (added 05.02.13):
GASYSIEI-Some of the Namco games, which uses the 19 mapper PCB, contains also the specific self-test routine. It can test and initialize the internal RAM buffers. Similar to the other Namco games series, in order to run these tests, you must plug in a special device to the famicom expansion port. This device is much simpler than mentioned another device. It just takes one bit of data and immediately returns it inverted to the data port, there is no FIFOs inside. When the program detects the device presence, it performs RAM test and initialization. If RAM is already tested/initialized, the screen will turn blue. If RAM isn't initialized, but after init and test all is fine, then screen will turn yellow or pink. If, even after the reinitialization, RAM test fails, then screen will turn red. After the tests, program goes to the infinite loop, so yo must unplug special device to boot into the game. Using this Game Genie code you can skip the special device check and just directly to the RAM initialization routine. This game tests it's WRAM.

King of Kings, The (Wisdom Tree)

(BUR) Stage skip (added 17.06.14):
As in many other games, developed by Color Dreams, this one contains a generic level skip cheat, but rather disabled, or which can be enabled in game scripts. To enable it, set the RAM var at $003B any non-zero value. Now during game hold B, then press Select to skip current level. There is no check for the maximum levels, so you just load a garbage if exceeded a number of valid levels.

Kinnikuman - Muscle Tag Match, M.U.S.C.L.E.

(UNI) Round select (added 11.12.08):
At the wrestler selection screen, hold A + B on controller 2 and B on controller 1 at the same, then press Up or Down on controller 2 time to increase or decrease round number accordingly.

Kiwi Kraze, New Zealand Story

(BUR) GameGenie (added 26.03.12):
NNNYEYAE-Enables Level Skip cheat. During the game play press Select to skip to the next level including the ending sequence.
Source: BMF54123

(BUR) Hidden text (added 26.03.12):
The RESET routine in this game uses string
HELLO
in game's character mapping, not ASCII, and one byte from the following code ($20) to check if game was soft or hard reset.
Source: BMF54123

Klash Ball

(GEN) Quick exit:
During the game, press Select + Start.

(UNI) Sound test:
At the title screen, when message "push start button" appears, press Down + A + B + Start on controller 1 and Right + B on controller 2 at the same time.

(UNI) Music test (added 05.01.08):
Hold Right on controller 2, then press Reset.

Knight Rider

All versions:

(FIX) Level skip (added 17.06.14):
Pause the game, hold Up + Left + A + B and press Select, then unpause it back. This will skip current level in the Mission mode right to the Boss, and complete the race in the Drive mode.

US version:

(FIX) Ending sequence (added 17.06.14):
Hold Select, then press Reset.

(FIX) Level select:
Hold B, then press Reset. At the briefing screen with Devon you will be able to select the starting level. Press Start to begin game play. Can be accessed with secret password below as well.

(UNI) Secret password (added 17.06.14):
MIYAZAWASAKAI-Enter the Level select mode, which can be accessed as well with button code above.

Japanese version:

(FIX) Ending sequence (added 17.06.14):
Hold Select or Up or both, then press Reset.

Konami Hyper Soccer

(BUR) Copyright check (added 02.12.13):
As most of Konami games after 1992 year, this one contains a complex copyright check inside. The game doing three different tests for it's data consistency at various game parts, including check for "KONAMI" word presence in the tilemaps, some other tilemaps consistency, and partial checksumming of every PRG banks. If any of tests fails, then protection flag is toggled. This will cause higher level of difficulty (9 against 3), clear all team parameters before the game start or penalty and doesn't allows you to make a goal.

Koushien

(UNI) Secret team:
Hold A on controller 1, then press Reset. While demo cut scene is rolling, before the title screen appears, press Up, Up, Down, Down, Left, Right, Left, Right, B, A on controller 1. Select one or two player mode, the first player's default home place will be "東西南北" or Touzainanboku (East, West, South and North) and team name will be "こうしえん高校" or Kuoshien koukou (Koushien senior high school).

Krazy Kreatures

(GEN) Sorf reset:
Press A + B + Select + Start to return to the title screen.

(GEN) Level select:
Start a game, press Start to pause it. Hold A and press Select 10 times. Now lose the game and go back to the options screen at the beginning, you will be able to select from 24.

(BUR) GameGenie (added 08.10.08):
KEOXYOUE-Enables joypad hint at name entering screen for the hi-score table.

Krion Conquest, The, Magical Doropie

Japanese version:

(UNI) Extra character 1 (added 28.12.08):
At the title screen, press Up, Down, Up, Down, Left, Right on controller 2, then on controller 1 hold Select and press Start. After game starts main player character will change to male character.

(UNI) Extra character 2 (added 28.12.08):
At the title screen, press Up, Up, Down, Down, Left, Right, Left, Right, A, B, A, B on controller 2, then on controller 1 hold Select and press Start. After the game begins, the main character will change to male.

(UNI) Level select (added 28.12.08):
At the title screen, press Up, Down, Up, Down, Left, Right on controller 2, then on controller 1 hold Select and press A. Press Up or Down to change level number, press Left or Right to select between level and sublevel index. Press B to reset level number. Press A or Select to start new level. Level 5-4 actually doesn't exist. After some animation sequence you will be in the middle of nowhere.

(UNI) Invulnerability (added 28.12.08):
At the title screen, press Up, Up, Down, Down, Left, Right, Left, Right, A, B, A, B on controller 2, then on controller 1 hold Select and press A.

US version:

(BUR) GameGenie (added 17.06.14):
GAEEGASA-Re-enables the continue option at the title screen.

Krusty's Fun House

(UNI) RAM clear (added 18.06.14):
Hold B on controller 1, then press Reset to reinit game's memory. This will reset all scores and entered passwords, which otherwise won't be erased until power off.

(FIX) Unlock all levels (added 27.09.12):
Hold Up + B + Select on controller 1 and Start on controller 2 at the same time, then power off and on again the console. Start a new game, instead of the first level password "HI__KIDS", the password "FLAVE___" will be displayed. Enter this password. From now, instead of scores, a string "CHEAT" will be displaying. All levels from now are unlocked and free to play. The same effect can be reached just by entering the following password without any cheats. Every time you enter this password, the cheat flag toggles on and off even after reset. When the cheat flag is off, the secret password only works as Level 5 password, which normally can't be accessed with password.

(FIX) Secret passwords (added 27.09.12):
GSSMELLS-Changes enemies on the levels to the big mouses.

(BUR) Hidden text (added 27.09.12):
The RESET routine in this game uses string
GAZ
to check if game was soft or hard reset. Also the game has more passwords, up to Level 6, this password is
GLPLONKA
but it is never used, if you enter the Level 6, all doors will be closed and you just can't play.

Kujaku Ou 2

(UNI) Sound test:
At the title screen, hold A + B then press Start.

(BUR) GameGenie:
KUKKTALX+OOKKYEEZ-Replaces the Sound test mode with disabled in the final release Debug menu.

Kung-Fu Heroes, Super Chinese

(FIX) Continue:
At the title screen, after the game over screen, hold A then press Start.

Kunio-kun no Nekketsu Soccer League

(UNI) Sound test (added 16.11.14):
On the Waiting Room screen (before the match), choose "おうえん きょく" ("Select BGM"), and then put cursor to the 6th option "ねっけつFCの てーま", hold Left and press Select.
Source: tcrf.net

(GEN) Hissatsu attacks:
During a Nekketsu League match, pause the game then press A, A, A, B, A, A, A, B, A, A, A, A, A, A, A, then unpause.

Kurogane Hiroshi no Yosou Daisuki! - Kachiuma Densetsu

(UNI) SRAM clear (added 18.06.14):
Enter the third option at the title menu (Backup Data), hold A + B on controller 2, then press Start on controller 1. All saved games will be erased.

(GEN) Credits (added 02.12.13):
At the title screen, hold Select + Start then press A on controller 1.
Source: ReyVGM

Kyatto Ninden Teyandee

(FIX) Hard Mode (added 18.06.14):
At the title screen, press A + B on controller 2 and B + Select + Start on controller 1 at the same time. Also, you can enable Hard Mode during ending sequence after beating the game, just press A on controller 2 and A + B + Select + Start on controller 1 at the same time. The game will immediately returns to the title screen with Hard Mode enabled.
Source: ReyVGM

(UNI) Sound test (added 25.08.06):
At the title screen, hold A + B + Select and press Start on controller 1.

(UNI) Main character select (added 18.06.14):
There are three main characters in the game. Normally, you can select only one of them to play before every Round. Pause the game, hold A + B on controller 2 and press Select on controller 1 to cycle between main characters. Deselect and select the main character in the Pause menu to apply the changes.

Kyonshiizu 2

(GEN) Instant retire (added 18.06.14):
Whenever you fighting an enemy, pause the game, press Up + A + B on controller 2. You'll immediately be returned to the temple at the beginning of the day, but just with a half of your money.
Source: ReyVGM

(FIX) Cheat mode (added 18.06.14):
Whenever you fighting an enemy, pause the game, hold A + B on controller 2 and keep holding it all the time you entering and applying this cheat. Now press Up, Down, Down, Left, Left, Left, Right, Right, Right, Right on controller 1. If done right, the word "Pause" will change to "KGDG #0". Enter one of the button codes below on controller 1 to change the number to your desired cheat. Each cheat has to be done sequentially, for example, if you want cheat #5, you have to enter the 1-4 first. Once the number changes to the cheat you want, press Down on controller 2 to apply it.
No code-0 - Refill Energy (default)
Up, Left, Down, Right, Up, Down, Up-1 - Extra Candle
Down, Left, Right, Down, Left, Down, Right-2 - Waterway Map
Up, Left, Left, Left, Right, Up, Left-3 - 99 Eggs
Right, Right, Up, Down, Left, Down, Down-4 - 99 Molotov Cocktails
Up, Left, Left, Up, Down, Right, Up-5 - Have The Crystal Ball
Down, Down, Left, Right, Down, Down, Right-6 - Greenbag from Gaia
Down, Left, Up, Up, Right, Up, Down-7 - Invincibility
Up, Up, Up, Up, Up, Up, Up-Return to the code 0
Source: ReyVGM

(UNI) Extra 100000 money (added 25.06.08):
Any time during the game, when you need a money, go to the Temple (the very first building where you appear at the game start and where you can sleep). This trick is working only during noon (reddish), so you must wait until it comes (not be mistaken with morning, which is reddish too, but appears after a night). Stand under the gate's roof, so you should be completely hidden with it. Pause the game and press Down + A + B on controller 2. Now unpause and enter the Temple. Select "Oyasumi" ("Sleep") option, if all done right, before you get to sleep, you'll obtain an extra 100000 money. This trick can be done multiple times. If you doesn't want to wait too long for the evening, while staying under the roof in pause mode, press Select to switch to the next part of day immediately. If currently is a day, press Select once, if night or morning, you must press it 3 or 2 times accordingly.

(UNI) SRAM clear (added 20.11.12):
Hold Up + Down + Left + Right on controller 2 then press Reset. Now, the program is waiting for A on controller 1 to be pressed. When you press it, if SRAM is properly initialized, a message "WORK RAM INIT OK" will be displayed all along with the "PROM OK!" and "CROM OK!" messages for a very short time. In other case, you'll see a message "WORK RAM NO INIT. BUSH B" and then "PLEASE SET POWER OFF" when B is pressed and WRAM is initialized. CRC tests for the PROM/CROM data is performed at the game's boot automatically, so if you can reach this WRAM test, it's mean, that tests are passed. Instead, if one of PROM/CROM data is damaged, the messages "PROM ERROR" or "CROM ERROR" will be displayed.

Kyuukyoku Harikiri Koushien

(UNI) Debug menu:
At the main game menu, enter the last option. In the new menu, point cursor to the last option again and press Select.

(UNI) Skip to 6th round (added 19.06.14):
At the PLAYBALL!! screen, hold Left + Select. When the game starts, a sound will confirm correct code entry. Now you'll start from 6th round.

(UNI) CRC test (added 19.06.14):
Hold Up + Down + Left + Right on controller 2, then press Reset. Game will perform a self-testing for the PRG, CHR ROMs and a SRAM test.

Kyuukyoku Harikiri Stadium

(UNI) WRAM test (added 03.12.13):
Hold Up + Down + Left + Right on controller 2, then press Reset. The screen will remain blue until you press A on controller 1. Then simple WRAM test will be performed. If data isn't match (from $7F80 to $7FFF, first byte is $55, last is $AA, the rest is $00), then "NG" on the pink background will be displayed and held. If match, then "OK" will be displayed for a short time on the green background and game continues to boot as usual.

Kyuukyoku Harikiri Stadium - Heisei Gannen Han

(UNI) WRAM test (added 03.12.13):
Hold Up + Down + Left + Right on controller 2, then press Reset. The screen will remain black until you press A on controller 1. Then simple WRAM test and init will be performed. If WRAM wasn't initialized, then "NG" on the red screen and then "OFF" will be displayed and held. After initialization, "OK" will be displayed for a short time on the green screen and the game continues to boot as usual.

(BUR) Hidden text (added 08.12.13):
The RESET routine in this game uses string
WINKY SOFT 1989
to check if game was soft or hard reset. The Winky Soft programmer sometimes left it's other hidden copyright, like "Sirius Works" with the number of game was developed. There are two games for NES are known having this sting: "Dai-2-Ji - Super Robot Taisen" with 006 number and "My Life My Love" with 005.

Kyuukyoku Harikiri Stadium 3

(UNI) Field madness (added 25.06.08):
When a right-handed catcher gets DEADBALL from the pitcher, quickly hold Up + A + B on controller 1. Team gets mad and going to FIGHT!

(GEN) 80000 Edit Points (added 28.12.12):
At the main menu, enter the "さくせい" ("Edit") option. Now hold Right + Start and press A twice. You should get 80,000 edit points instead of 30,000.
Source: ReyVGM

(GEN) Credits (added 28.12.12):
At the main menu, enter the "せってい" ("Settings") option. There is a hidden invisible menu option at the end of menu, select it and press A.
Source: ReyVGM

(UNI) WRAM test (added 03.12.13):
Hold Up + Down + Left + Right on controller 2, then press Reset. The screen will remain black until you press A on controller 1. Then simple WRAM test and init will be performed. If WRAM wasn't initialized, then "NG" on the red screen and then "POWER OFF" will be displayed and held. After initialization, "OK" will be displayed for a short time on the green screen and the game continues to boot as usual.

Kyuukyoku Tiger, Twin Cobra

Japanese version:

(GEN) Unlockable (added 07.04.08):
When "the end" message appears on screen after the credits, a message "Your password is KTTAISONMAI89PRTN23Y" appears. There are no password entering modes either in FC nor in GEN or PCE versions. Password meaning is unknown. The English version haven't any staff messages nor a "password" messages, but text is still present in ROM.

Labyrinth

(BUR) GameGenie (added 04.12.13):
TONTSSGP+YENVKIIO+IAETVVLA+AZEVKVGG+YYEVSTZO-Re-enables level select cheat. This cheat were probably intended to be called on pause or during the game with some buttons held, but currently there is no proper button reading on pause, so with some hacking it was returned to ingame mode. During the game press A to increase internal level counter, press B to advance to this level. Most interesting, that cheat should be much harder to enter, while holding B you must've enter at least Down, Left, Down, Right, Down, Up, Down, Up, Left, Down, Right, Up, Right, Down, Left, but the first button code was replaced with $FF (but probably it was Down), and cheat were shorted just to B.

Lagrange Point

(FIX) Sound test:
Hold A + B on controller 2, then press Reset.

(UNI) Unknown (added 20.06.14):
During the game, before speaking with certain characters (mostly those who joins you), hold Select on controller 1 and A + B on controller 2 at the same time, then press A on controller 1. This will alter some parameters, calculated before the conversation. Meaning is unknown. For example, you can do it when first meet Dennis at the game's beginning. The meaning of such calculations is unknown.

(BUR) GameGenie (added 20.06.14):
GAVXUTEI-Re-enables some odd easter egg at the game ending. When all characters are surronding the main character during ending sequence and the nurse coming to kiss him, press A on controller 2 to make the people step closer to the character. Release to return all them back.
XVEKITAV-Re-enables disabled in the final release the starfield animation at the title screen.

Last Action Hero

(BUR) Hidden text (added 25.11.12):
Apart from some portions of source code stored in ROM, a string
It Work
partially used for initialize random number generator. Only first 6 symbols used.

Last Armageddon

(UNI) Movement speed select (added 23.06.14):
During the game, while walking on the map, press Up + B to switch between slow and fast movement.

Last Ninja, The

(UNI) Cheat mode (added 24.11.07):
Start a new game, get the key from the garden gate, go outside and find a shuriken weapon, return to the garden gate, open it and go to the next location with a river and a floating boat. Stand at the left corner of the square between bush and bench, turn face to the leftmost tree at this location, switch weapon to shurikens and throw them into the same direction. When 1 shuriken is left, a sound will confirm trigger switching. Then you should jump into the river and die 6 times, so keep all your lives before this place! After the game over screen you'll see the message "Isn't that lucky? You've got CHEAT POWER". Now start a new game again and follow instructions.

Layla

(UNI) Secret passwords (added 16.12.12):
Password-Pistol|Machine
Gun
|Grenade|Flame
Thrower
|Axe|Grenade
Launcher
|Knife|Shield|?|Speed|Level|Keys|Iris
ONOMATSUNONAKAJIMA-10|100|50|50|50|50|50|50|5|5|||no
AHK0TINAMS1RIALYAL-10|||||||||1|||no
MANTOINUMONKUNEKOO-1|||||||||1|7||no
147147147147147147-1||147||147||147|||1||1, 4, 7|no
KAKUSHIKOMANDODAZO-2|||||||||2|3||no
NUKENINHAVOLGUARD2-1|||||200||||9||1-4|no
OPUSYONHAIRISDESU0-1|||||||||1|||yes
CAKEICERINGOKOHRII-1|||||||||1||1-7|no
MUTEKIKAMOSHIRENAI-1|||||||255||1|||no
0123456789ABCDEFGQ-3|30|5|200|20|100|15|2||5|2||no
MAHOUTUKAISARINANO-1||||||||255|1|||no
IRUKIBOMOTIHONODNI-1|||||||||1|||no

Legend of Prince Valiant, The

(UNI) Cheat mode (added 23.06.14):
Wait for the title screen is showed up after the initial copyright screen at the game's boot. Now, any time during demo loop, press Select, Up, Left, Right, Down, Left. The screen will turn b/w for a short time. This will enable the invulnerability during the game, as well as level skip cheat. Press Down + B + Select to instantly complete current level.

(BUR) Hidden text (added 13.11.08):
The game contains a hidden version text:
****************
* P.VALIANT V7 *
*      PAL     *
*   01/09/92   *
****************


(BUR) GameGenie (added 13.11.08):
ESNOVAEY-Enable the language selection menu at the title screen. English, Deutch, Franciais languages are available.

Legend of the Ghost Lion, White Lion Densetsu

US version:

(BUR) Disabled cheat (added 23.10.07):
There are a huge portion of old unknown code sitting at the end of bank 6 in this game. At the very end of it there is a cheat test routine, checking the entry of the Konami code (Up, Up, Down, Down, Left, Right, Left, Right, B, A). No code being used in current version, some system calls are shifted against the current addresses, so it must be some old debug or even different game's code. It was completely removed from the Japanese version.

Legend of Zelda, The, Zelda no Densetsu 1 - The Hyrule Fantasy

(GEN) Save screen:
During the game, hold Up + A on controller 2, then press Start on controller 1.

(GEN) Secret words:
Enter as player name:
ZELDA-Second quest

Legendary Wings

(BUR) GameGenie (added 02.12.13):
GAKASPSA-Re-enables the unlimited lives cheat. At the title screen, hold Up + A + B on controller 2 then press Start on controller 1.

Legends of the Diamond

(UNI) Sound test (added 02.12.13):
At the "BANDAI" logo screen, hold B on controller 1, then press Right + A on controller 2.

Lei Dian Huang Bi Ka Qiu Chuan Shuo (Nanjing, NJ046)

(UNI) Secret message (added 21.05.14):
During the game, while in conversation mode, hold Up + Select + Start on controller 1 and skip with A to the end of the dialog. The copyrigh string will be displayed in the dialog box. This cheat can be found in a couple of Nanjing games on the same engine.

Les Chevaliers Du Zodiaque - La Legende D'or, Saint Seiya - Ougon Densetsu

Japanese version:

(GEN) Extra 999 EX glitch:
While playing, press Select to enter the menu. Enter the second option ("Ability"). Place the cursor on "End" and press Up + Right. If done right, the cursor will stay outside of the menu border. Now press B to increase your EX points to 999. This happens because of program bug, involving corruption of the variable shared between two different functions, which is used in menu and sound engine. Just by accident this bug cause exactly the same menu position that is need to be set to match the EX position. This bug was fixed in the French version.
Source: ReyVGM

Lethal Weapon

(BUR) Hidden text (added 06.10.08):
ROM contain hidden text unused in any part of game:
version 0.8 5/12/92 eurocom developments ltd.


Lethal Weapon (Taiwan)

(UNI) Invulnerability:
At the title screen, press Up + Left + A + B + Select. A sound will confirm correct code entry.

Liang Shan Ying Xiong (Nanjing, NJ023)

(UNI) Secret message (added 21.05.14):
During the game, while in conversation mode, hold Up + Select + Start on controller 1 and skip with A to the end of the dialog. The copyrigh string will be displayed in the dialog box. This cheat can be found in a couple of Nanjing games on the same engine.

Lifeforce, Salamander

All versions:

(FIX) Borrow life (added 23.06.14):
In 2-player mode, when one of the players run out of lives and the "GAME OVER" message is displaying, press A on the corresponding controller, you'll borrow a spare life from another player if any.

English versions:

(FIX) Extra 30 lives:
At the title screen, press Up, Up, Down, Down, B, A.

Linus Spacehead's Cosmic Crusade, Cosmic Spacehead

(UNI) Soft reset:
Press A + B + Select + Start on controller 1.

(UNI) Smiley test:
Absolutely all games by Codemasters have internal PRG ROM and CHR RAM testing routines. So called "Smiley tests". Tests are normally enabled, but for triggering it needs pressing all D-Pad buttons. Hold Up + Down + Left + Right + A + Select + Start to enter the PRG ROM test or hold Up + Down + Left + Right + B + Select + Start to enter the CHR RAM test, and press Reset. A green smile means that test passed, red sad face - failed.

Lion King, The

(GEN) Stage Skip:
Pause the game any time and press B, A, Right, Down to skip to the next stage.

(UNI) Invulnerability (added 23.06.14):
First, set the "SKILL" level in the options menu as "COB". Start a new game, complete the first round, collect one bonus bug in the second round, complete the second round with exactly 2 lives left. Pause the bonus game and press B, A, Right, Down. If done right, the bonus game will continue automatically. Finish it, no matter if you win or loose. Now, at the third stage loose the rest of your lives. Select "NO" option at the "CONTINUE" screen and return to the title screen. Now start a new game, and you will be invulnerable.

(UNI) Easter egg (added 23.06.14):
Do the Invulnerability cheat. Highlight the "OPTIONS" menu item, hold Left and press A. Or if you already in the options menu, select any option except "EXIT", hold Up or Left or borh and press A. The skill name will change to "BOY LOVE".

(BUR) Unused cheat (added 23.06.14):
There are two cheat sequences at the pause mode are tested actually. The second one is A, B, B, A, B, B and you can see it's working, if you enter it on the pause, the game will unpause. Unfortunately, this cheat does nothing in the current game version. This is clearly a leftover from the Game Boy version, where it works as the level select cheat. The NES version, obviously, is a quick and dirty port from the Game Boy.

(BUR) Hidden text (added 23.06.14):
There are some unused text in the ROM:
Ted Cameron
Suffer little children to come unto me
and
I AM the Way, the Truth, and the Life - No-one comes unto the Father but by me.


Lion King III, The - Simon and Pumba (Dragon Co., TomSoft)

(BUR) Hidden text:
There is some hidden copyright text inside ROM:
Create by:Tomsoft Studio.E-mail:tomsoft@ihw.com.cn.


Little Magic

(UNI) Cheat mode (added 04.12.13):
At the Data East copyright screen, before the title screen appears, hold A + B on controller 1 and controller 2 at the same time. From now, you can turn the CPU controlled opponent to the manual controlled opponent by player 2. To do that, just press Select during opponent's turn. Additionally, you'll be allowed to change any battle settings during battle, which is impossible in normal play, as well as select CPU vs CPU battle mode, inaccessible in normal game.

Little Mermaid - Ningyo Hime, Little Mermaid, The

(UNI) Invulnerability (added 20.06.08):
At the title screen, hold Right + A + B on controller 2, then press Start on controller 1. Select "NO DAMAGE" to enable invulnerability.

Little Nemo - The Dream Master, Nemo - Pajama Hero

(GEN) Level select:
At the title screen, press Up, Select, Left, Right, A, A, B. A new menu option "DREAM SELECT" will appear. Highlight it and press A an equal amount of times as the desired level.

Little Ninja Brothers, Super Chinese 2 - Dragon Kid

(UNI) Debug mode (added 25.06.14):
Hold Right + A + Select + Start, then press Reset. Now, during the game, while walking on the map, hold Start to disable random encounters. While walking on any stages, including in fighting mode, hold Select to free move throught the obstacles. In the Field Meeting mode this enables the CPU control for both players, so field meeting will play automatically.

(FIX) Secret passwords:
US|Japan-Effect
SOUND|きいてくれよ-Sound test
FULL|ふるそうび-Full equip at start
ENDING|さいご-Ending sequence

Little Samson, Seirei Densetsu Lickle

(UNI) Restore energy:
At very end of the game on Normal mode, when the dark castle have arrived, at the screen with the castle image and a flashing lightings, press Up, Down, Up, Down, Right, Left, Right, Left, A, B, A, B.

(FIX) Secret passwords:
The *BUG PASSWORD* means this password doesn't meant to be existed even as a secret. The code at this position is actually dummied out with $FF, and shouldn't be valid. But the password test program always take lover 5 bits of the byte and treat it as a symbol number, where $1F is "5". There are more dummied out passwords in the table, but the first one preventing others from triggering.
US|Japan-Effect
?2KC|4WHB-Stage 1: Ruins (Easy)
7XGN|1SEK-Stage 1: Ruins (Normal)
BN&S|AK5O-Stage 2: Sky (Easy)
KK7B|HH1A-Stage 2: Sky (Normal)
BCWR|ABRN-Stage 3: Waterfall (Easy)
V5?3|QZ4X-Stage 3: Waterfall (Normal)
5JSQ|ZGOM-Stage 4a: Mushroom Cave (Easy)
XSRR|SONN-Stage 4a: Mushroom Cave (Normal)
NS6K|KO0H-Stage 5: Forest (Easy)
ZW4&|TRY5-Stage 5: Forest (Normal)
4RD7|YNC1-Stage 6: Swamp (Easy)
FWWF|DRRD-Stage 6: Swamp (Normal)
1NWB|VKRA-Stage 7: Bubble Cave (Easy)
3MTT|XJPP-Stage 7: Bubble Cave (Normal)
PHC&|LFB5-Stage 8: Mountain Base (Easy)
XBQQ|SAMM-Stage 8: Mountain Base (Normal)
VM84|QJ2Y-Stage 9: Ice Palace (Easy)
D6HL|C0FI-Stage 9: Ice Palace (Normal)
QLXZ|BITP-Stage 10: Temple (Easy)
?2FK|ERIF-Stage 10: Temple (Normal)
CLZT|MIST-Stage 11: Volcano (Easy)
GWLH|4WDH-Stage 11: Volcano (Normal)
J62?|G0W4-Stage 12: Dark Mountain (Easy)
C92K|B3WH-Stage 12: Dark Mountain (Normal)
DP03|CLUX-Stage 13: North Castle (Easy)
GPLH|ELIF-Stage 13: North Castle (Normal)
$$$$|5555-Stage 14: Floating Castle part 1 (Easy) *BUG PASSWORD*
JR6P|GN0L-Stage 14: Floating Castle part 1 (Normal)
BN7Z|AK1T-Stage 15: Floating Castle part 2 (Normal)
0ZZ6|UTT0-Stage 16: Floating Castle part 3 (Normal)
?9MW|43JR-Stage 17: Floating Castle part 4 (Normal)
40N6|YUK0-Stage 13 Boss + max health & potions (Easy)
8NBX|2KAS-Stage 13 Boss + max health & potions (Normal)
N0QB|KUMA-Stage 16 Boss + max health & potions (Normal)
40N7|YUK1-Stage 1: Ruins + max health & potions (Easy)
K7W6|H1R0-Stage 1: Ruins + max health & potions (Normal)
NB50|KAZU-Music room

Locksmith

(GEN) Level and difficulty select:
At the level and lives display screen, hold A + B + Select. Now, press Up or Down to increase or decrease the level you're on, press Left or Right to decrease or increase the game's difficulty. This cheat is unlockable. The game will tell you this secret, when you beat all 8 levels.

(UNI) Secret copyright (added 03.12.08):
Any time during the game, press A, B, B, Select, A, B, Select, B, A, Select.

Lode Runner

(FIX) Level select:
At the level/score info screen, or during the game, press Select then press A or B to select desired level and press Start.

(FIX) Game speed:
At the Level select screen hold Select, then press A to increase or B to decrease speed of the game. Press Start to play selected level with corresponding speed. Note: default speed delay is 35, pressing A decreasing, and pressing B increasing it by 1. If you press A 35 times you'll get a maximum game speed. But if you press A one more time, you'll get the maximum delay, and slowest game speed, because byte is wrapped to 255. Accordinglly, press B 220 times to get the slowest speed, and one more time to get the fastest speed.

Lone Ranger, The

(GEN) Secret passwords (added 24.01.13):
0810 7830 3251 2-Level select, as well as a full stock of money and bullets. The last three spaces of the password are unimportant and may have any value.

Loopz

(UNI) Soft reset (added 04.12.13):
During the game, press A + B + Select to immediately return back to the title screen.

Lost Word of Jenny

(UNI) All keys (added 09.12.07):
At the title screen, press Start and wait until the pumpkin carriage stops in the center of the screen. At that right moment, press Select once, then Down, Right, B, Left, Right, A, Up, Down, A, Left, Up, B.

Low G Man

(FIX) Secret passwords (added 22.02.10):
A complete list of the secret and generic passwords.
matt-1st Quest Level 1-2
hnry-1st Quest Level 1-3
mich-1st Quest Level 2-1
danm-1st Quest Level 2-2
jimg-1st Quest Level 2-3
elle-1st Quest Level 3-1
malz-1st Quest Level 3-2
hisa-1st Quest Level 3-3
etsu-1st Quest Level 3-4
isac-1st Quest Level 4-1
kuni-1st Quest Level 4-2
kawa-1st Quest Level 4-3
bill-1st Quest Level 5-1
ishi-1st Quest Level 5-2
aman-Extra Level 1-0
ino♥-1st Bonus Level 6-0
shio-2nd Bonus Level 6-0
naka-Extra Level 3-0
gata-3rd Bonus Level 6-0
kid♥-1st Quest Ending
teru-2nd Quest Level 1-1A
mie♥-2nd Quest Level 2-1A
kado-2nd Quest Level 3-1A
same-2nd Quest Level 4-1A
irie-2nd Quest Level 5-1A
maru-3rd Quest Level 1-1B
sima-3rd Quest Level 2-1B
higu-3rd Quest Level 3-1B
ogaw-3rd Quest Level 4-1B
iizu-3rd Quest Level 5-1B
shot-Full Weapons and Ammo
lobb-Extra 9 Lives
song-Sound Test
say♥-2nd Quest Ending
yes♥-3rd Quest Ending

Lunar Ball, Lunar Pool

All versions:

(BUR) Hidden text (added 24.11.08):
The RESET routine in this game uses string
JEMINI DAZO!!
to check if game was soft or hard reset.

(UNI) Easter egg (added 25.06.14):
Press Reset 10 times. Now, at the game over screen you'll hear a different music.

Japanese version:

(BUR) GameGenie (added 23.06.09):
NYSVNEZK-Re-enables the round skip cheat. Press Select to advance to the next round. This was just a debug in the prototype version. The final version is checking for the "J" letter in the text mentioned above and doesn't enable this cheat if it is present.

US version:

(UNI) Round skip (added 25.06.14):
Press Reset 58 times. Now, during the game press Select to skip current round.

Lupin Sansei - Pandora no Isan

(UNI) Level warps:
At the title screen, press one of the following button codes:
Up, Down, Left, Right, B, A-Level 2
Left, Right, Up, Down, A, B-Level 3
Down, Up, Right, Left, A, A-Level 4

(BUR) Hidden text (added 23.06.09):
The RESET routine in this game uses string
Yoshikawa
to check if game was soft or hard reset. Also the game contains some hidden copyright text at end of file:
Copyright 1987  Namco Ltd.  All Rights Reserved Programmed By.. HARUHISA.UDAGAWA &  KUMI.HANAOKA
The names part of this text used as part of data for a hidden CRC test routine.

(BUR) GameGenie (added 26.06.14):
AENYVNNY-Re-enables the debug mode. First of all, this disables the title screen warp cheats, enables the invulnerability toggle at the player selection screen, just hold Left and press Start to toggle it on and off. During game press B on controller 2 to skip to the next stage. Also on controller 2, press Right to select the item slot, press A to add more items. Finally, there is some scene skip after the Stage 2 and message "Game Over" will change to "To Be Continued".
GAXYNTEI-There are a series of the Namco games, made by the same programmers Haruhisa Udagawa and Kumi Hanaoka, that contains the same self-test for the data integrity. To enable any of these tests you need a special device that should be plugged into the expansion port. The operation of that device is very simple. It should accept the data bit from the data input port and return it back inverted to the output data port. The device consists of 4-bit shift register, working as some sort of the FIFO buffer. The input bits are goes to the input and then shifted to te output after a 4 cycles. At the game's boot, it tries to send some special data to the device. If the data output doesn't match the data input inverted, then the game continues the normal operation. But if all data (usually 32, rarely 64 bytes) is matches, self-tests will be performed. The program calculates 24-bit partial checksums for the PRG (excluding the last 8K) and the CHR data, summing only every 15th byte, and comparing it against the etalon. Before testing of the PRG data, the background color turns red, before testing of the CHR data, it turns green. If any of these tests are failed, the program will jump directly to the reset routine. It means, one of these tests will be performed infinitely, but until the special device is plugged in, or until the test are passed. Normally, you'll see the red to green flash just before the game's boot. Or the static red screen if the PRG data is bad, or the flashing red to green screen if CHR data isn't good. Using this Game Genie code you can skip tests for the special device presence and jump straight to the integrity tests.

Mad Max

(FIX) Secret passwords:
MMAX-Start at Arena 1
WAST-Begin Road war 2
BLAS-Start at Arena 2
MAEL-Begin Road war 3
HUMU-Start at Arena 3

Magic Bubble, Mermaids of Atlantis, Bubble Bath Babes, Soap Panic

Early versions:

(UNI) Level select (added 23.04.10):
Start a new game, while the "STAGE x-x" message is displaying on the screen, press Start to pause the game, then press Up, Right, Down, Left. From now you can change the level and sublevel numbers by pressing B and A accordingly. Press Start to end level editing, then press Start again to unpause and begin to play from the selected level.

Later versions:

(UNI) Ending sequence (added 15.01.08):
At the title screen, press Select then press Up, Up, Down, Down, Left, Left, Right, Right, A, A, B, B.

Magic Candle, The

(UNI) Sound test and debug mode (added 27.06.14):
Hold Up + Right + A + B on controller 2 and Up + Right + A + B + Select + Start on controller 1 then press Reset. Use Left or Right on controller 1 to select music and Left or Right on controller 2 to select sounds. Press any other buttons to exit back to the game. This cheat additionally enables the debug mode. Now, during the travel mode, on controller 2 press A to add 1000 gold, press B to advance to the next level. Additionally, when you start a new game, before exit the name entry screen, hold one of the following buttons on controller 2 to start from corresponding chapter:
A-Chapter 1
B-Chapter 2
Right-Chapter 3
Left-Chapter 4
Up-Final Chapter

(BUR) Hidden text (added 27.06.14):
The RESET routine in this game uses part of the string
M.C. (FC)  BY P.CHAN (JST)
to initialize its SRAM data.

Magic Darts

(UNI) Program version:
Hold Select at the "SELECT YOUR GAME!" menu until message "VERSION 01.02" appears.

(UNI) Secret message:
At the title screen, hold A + B, press Start to enter "SELECT YOUR GAME!" menu, do not release A + B and hold additionally Select until message "BY K1 NAKANISHI" appears.

(FIX) Secret words (added 05.01.14):
All secret names are enables the same weird hidden character, some names will be changed upong entering. Most probably, there must be more hidden secret characters, but only three left, one playable with different graphics, and two glitchy, utilizing already used graphics and can't be selected without hacking. There are 5 secret names total: "EBE", "SEX", "RNG", "MTY" and "TAD". The name "SEX" will change to "EBE" upon entering, the name "TAD" will change to "DAT". There is no more different effects to any of these names.

(BUR) Sound debugger (added 25.10.08):
There was "FAMICOM SOUND DEBUGER" mode at the development stage in this game, similar to the one from the "Silva Saga" game. But as against it, this debugger code wasn't much broken but still haven't any cross-refrences from the code and not working at all.
0000CCD0: D8 CC 46 41 4D 49 43 4F 4D 20 53 4F 55 4E 44 20 ..FAMICOM SOUND
0000CCE0: 44 45 42 55 47 45 52 00 A2 EC A0 CC 8E 36 00 8C DEBUGER......6..
0000CCF0: 37 00 A2 20 A0 66 20 24 F0 4C FB CC 4D 4D 43 31 7.. .f $.L..MMC1


Magic Jewelry

(UNI) Easter egg (added 17.03.14):
At the game over screen, hold Right + Select then press Start to see the developer's logo screen.

Magic Jewelry 2

(UNI) Easter egg 1 (added 17.03.14):
Hold Up + A + Select on controller 1, then press Reset, to see the developer's name "Hwang Shinwei" in chinese.
Source: BMF54123

(UNI) Easter egg 2 (added 17.03.14):
At the second title screen (with a player number selection), any time during the game, hold Down + Left + A on controller 1 and press Select to see the publisher company logo.

(UNI) Easter egg 3 (added 17.03.14):
At the second title screen (with a player number selection), only after the setup screen, hold Up + A + B + Select on controller 1, then press Start to see the full publisher logo and company name both in english and chinese.
Source: BMF54123

Magic John, Totally Rad

(GEN) Credits:
At the title screen, press Left, Left, Right, Up, Down, Down, Up on controller 2 then press Start on controller 1.

(GEN) Level select and Sound test:
At the title screen, press Up, Down, Down, Left, Left, Right, Right, Start on controller 1.

Magic Johnson's Fast Break

(BUR) Debug monitor (added 30.06.14):
During game, set the RAM address $2C to value $80. This enables the debug display at the top corner of the screen.

(BUR) Hidden text (added 02.12.08):
This game using for padding some info about developers.
 FAST BREAK     1989
     PROGRAMMER   KEVIN EDWARDS
     ARTIST       MARK WILSON
     MUSICIAN     TIM FOLLIN
  SOFTWARE CREATIONS LTD
FIRST FLOOR    204 OXFORD ROAD
MANCHESTER    M1 5QA
GREAT BRITAIN
TEL 061 236 1154
FAX 061 236 824


Magic Mathematics (Sachen)

(UNI) Secret message (added 07.04.10):
Start a new game in any mode, after the current question is written on the screen and programm is waiting for your answer, press Up, Up, Up, A, A, A, Down, Down, Down, B, B, B, Left, Left, Right, Right on controller 2 . A secret copyright message will appear.

Magical Taruruuto-kun - Fantastic World!!

(BUR) GameGenie (added 05.12.13):
PENNONNY-Re-enables some debug features, like invulnerability. Also, press A on controller 2 to skip current level. By pressing Up or Down on controller 2 increase/decrease items number in your inventory between levels.
AENNONNY-Similar to the previous one, but instead of invulnerability, you'll obtain 16 bags, 64 lives and some other parameters at the game start.

(BUR) Hidden text (added 05.12.13):
The RESET routine in this game should use the string
Yoshikawa
to check if game was soft or hard reset. Instead, the game only writes first two bytes of this sting to the RAM and never checks it.

Magician

(FIX) Spells:
PHOLRA-Razor
PHRAST-Axor
PHNAHU-Boomeraxe
PHRANA-Boulder
PHOLMIRA-Spear
VENAHUNARA-Ven
FISTMIRA-Fireball
FIRANAOLHU-Firestorm
FIOLNARAST-Fire ring
FIOLHUNARA-Fire spray
POHUNAST-Dispell
PONASTRANA-Lightning
POOLMISTNA-Repellent
POHURANAHU-Exorcise
POSTRAMIST-Death ring
PORAOLHUST-Psychic
MIOL-Help
MIFISTHURA-Meditate
MIRANARAST-Fly
MIRAHUFINA-Jump
PHRANARAHU-Phys Shield
VERANAMIST-Ven Shield
FIRANAHUNA-Fire Shield
PORANASTRA-Pow Shield
MINARA-Reveal
MIMIFINAST-Fleet Foot
MIMIRAHUNA-Slowmo
MISTRAOL-Featherlite
MISTNAST-Iron Boots
MINASTOL-Wakey Wakey
MIOLST-Light
MIRAHUOL-Translate
MINAOLNA-Twin
NAHUMISTMI-Sound test
HUHUMIHUHU-Who's Who (game credits)

Magnum Kiki Ippatsu - Empire City - 1931

(UNI) Secret passwords (added 05.12.13):
8E3B, A57D-Level select and invincibility. Select "CONTINUE" option, enter the first password, press Start, repeat with second password. Now, at the main menu, press A to increase level number up to 5, press B to increase sublevel number up to 8, press Start at the "START" option to begin game from selected level with invincibility.

(UNI) Password generator (added 05.12.13):
Stage:
Random:
Password:


Mahjan Samit Kabukicho Hen (Sachen), Mahjong World (Sachen)

Sachen-Hacker version:

(UNI) Tile select (added 07.04.10):
At the opponent selection screen, press A, A, B, Right, A, Left, B, Down, A, Up, then start a new game. During the game, press A to enable the tile select mode, press Up or Down to select a tile, press B to pick selected tile. The "Sachen"-only version of this game still checks for this cheat at the adult warning screen (third game option), but does nothing, even if you enter the correct code. The "Sachen-FC" version have this cheat completely removed.

Mahjang Companion (Sachen)

All versions:

(UNI) Tile select (added 07.04.10):
At the opponent select screen, press A, A, B, Right, A, Left, B, Down, A, Up, then start a new game. During the game, press A to enable the tile select mode, press Up or Down to select a tile, press B to pick selected tile.

Sachen version:

(UNI) Easter egg (added 07.04.10):
During the game, at the player's turn, press A, A, B, Right, A, Left, B, Down, A, Up on controller 2. Note, that this easter doesn't work if you enter the "Tile select" cheat first.

Mahjong Academy (Sachen)

(UNI) Slideshow (added 30.06.14):
At the opponent selection screen, hold Select + Start on controller 2 and Select on controller 1 at the same time, then press Start on controller 1.

Mahjong Club - Nagatachou

(UNI) Autoplay menu (added 01.07.14):
In any game mode, using the 4-Player adaptor for the Famicom, during the opponents turn, hold Up + Down + B on Controller 3 for a short time, then release the buttons. A menu with two options will appear, first option allows you to open all players tiles, the second option enables the autoplay mode, where all players including you will be CPU controlled.

(UNI) Extra Pts and points (added 01.07.14):
In the main game mode (first menu option), after every round you can trade some Pts in the special Shop for tickets. When asked, if you want to buy tickets, select "Yes" and press A, then immediately hold Up + Down + B on Controller 3, using the 4-Player adaptor. If done right, when the Shopkeeper appears, you'll get 300000 Pts and 270 tickets, and you can play the final round against most skilled players.

(BUR) Hidden text (added 01.07.14):
At the end of every 128K data block a some copyright and version text exist:
NAGATA 90/01/16=1.00R


Mahjong RPG Dora Dora Dora

(UNI) Tile select (added 05.12.13):
During mahjong battles, while selecting tile to discard from hand, hold A or B on controller 2 then press Select on controller 1 to change the rightmost tile to any you need.

Mahjong Taikai

(UNI) Cheat mode (added 01.07.14):
At the title screen or at the KOEI copyrights, hold Down + A + B on controller 2, then press Select on controller 1. This will set your level to 7 before the game. When you select to save the game, all players will obtain $9,999, including you, and you can continue the game. During the game, press Select and using the D-Pad buttons change any tile in your hand to any other. Enter the game menu and press Select to view the opponent's tiles.

Mahjong Taisen

(GEN) Sound test:
Hold Down + B + Select and press Reset. The screen should stay black. Use Up or Down to scroll through the music.
Source: ReyVGM

(GEN) Skip the intro:
Before starting a new game at the title menu, hold Right + A + B on controller 2.
Source: ReyVGM

(UNI) Faster animations (added 01.07.14):
Every screen transition in this game fades-in and fades-out the display with some speed. If you hold at least one of A or B or any D-Pad buttons on controller 2, the display will fades 4 times faster during screen stansitions. Additionally, B on controller 2 will speed up some cutscene animations during the game or the intro.

(UNI) Clear game statistic (added 01.07.14):
Every mahjong round, the game collects some info about number of rounds played, points won and other statistic. This statistic will be saved until the battery on cartridge is dead, no matter if you save or load other games, or start a new one. However, you can clear this statistic. Just before starting a new game at the title menu, hold Right + B + Start on controller 1. Unfortunately, there is no use of this statistic in this game at all, so itself it's useless.

(FIX) Secret words:
Enter one of the following words as a player name.
にちぶつ-Extra 200 EXP at start.
いさぽん-Extra 1000 EXP at start.
Source: ReyVGM

(BUR) Hidden text (added 01.07.14):
The SRAM and RAM initialization strings in this game are:
NihonBussan'92
and
@1988 Nichibutsu


Mahou no Princess Minky Momo - Remember Dream

(UNI) Secret passwords (added 02.06.14):
おねかいーきいて♥-Start a new game with all minigames enabled at the Game Center, including the final boss minigame, which is normally can't be accesible there and replaces the Fortune Teller minigame.

Majaventure - Mahjong Senki

(UNI) Cheat menus:
At the title screen, press Select to highlight the "CONTINUE" menu option. Hold Up + Select (the menu cursor should return back to the "START" option) and press Start to enter the stage select menu. Hold Select again and press Start to enter the enemy select menu, and finally hold Select then press Start to enter the sound test menu.

(GEN) Debug mode:
In the map mode, hold Right + B on controller 2 to freely pass through the gates and enemies. While in a fight, hold Left on controller 2 and enter and exit back from the status screen to see the opponent's tiles.
Source: ReyVGM

Major League Baseball

(FIX) Autoselect teams:
At the title screen, hold Down + Left + A + B + Select and press Start. The extra options will appear at the player select menu: "1 Player Set" and "2 Player Set". Select one of them, to automatically setup all teams by the CPU.

Majou Densetsu II - Daimashikyou Galious

(UNI) Password generator (added 23.12.07):
Note: bytes $00, $04, $10 are decimal numbers, each octet not greater than 9.
Random:
Password:
Password:


Maniac Mansion (Japan)

(UNI) Move the head (added 05.01.14):
During the game, on controller 2, hold B and press the D-Pad buttons to move the main character's head to the corresponding direction.

(UNI) Secret passwords:
おわりをみたい
おわりをみたい
おわりをみたい
-Ending sequence
しらとまなふ-"mattakuu" message
おわひ-"password ga nagaku de sumimasen" message
RESET-Reset NES system
せたかやくようか-"JALECO" message
JALECO-"jibun no tikara de tokou ne" message
よいおとかかたいなあ-Sound test

Mappy

(BUR) Hidden text (added 08.02.13):
There is a hidden copyright text at the start of the PRG ROM and the same one a the end of the CHR ROM:
COPYRIGHT 1983 1984 NAMCO LTD.ALL RIGHTS RESERVED


(BUR) GameGenie (added 03.07.14):
GASSYNGK-Re-enables the invulnerability cheat. At the title screen, press A or B to toggle the invulnerability. An "N" letter at the center of the screen will indicate that invulnerability is enabled.

Mappy Kids

(UNI) Cheat options (added 03.07.14):
The cheats in this game tested in a very odd way. Instead of just checking the button combinations, pressend on any Controller, this game is counting the time how long you hold corresponding button. The combination of buttons held and how long they are held will trigger some effects. You can hold these buttons in any order or simultaneously, but only while the title screen is displayed, before the demonstration start, then press Start on controller 1. There are total 4 counters and 4 corresponding buttons. A complete list of combinations and timings for each button described in the table below.
Hold B on controller 2 for a 3-4 seconds (value between $3C and $78)
Hold Select on controller 1 for a 4-5 seconds (value between $78 and $B4)
Hold A on controller 2 for a 5-7 seconds (value between $B4 and $F0)
-Sound test
Hold A on controller 2 for a 4-5 seconds (value between $78 and $B4)
Hold B on controller 2 for a 5-7 seconds (value between $B4 and $F0)
-Level select
Hold Select on controller 1 for a 5-8 seconds (value between $B4 and $FF) in addition to the Level select buttons-In addition to Level select, this adds an 765000 yen to each player.
Hold B on controller 1 for about 4 seconds (value between $5A and $78)-Extra 20 lives both for 1 or 2 Player modes

Mappy-Land

Japanese version:

(UNI) Stage select:
At the title screen, press Up, A, Down, B, Left, A, Right, A, Select + Start.

(BUR) GameGenie (added 04.07.14):
LVXZGAZA-At the title screen, hold A + B on controller 2, then press Start. There were an Extra lives cheat, but in the final release the number of lives given is the same as default, so there is nothing happens. With this code you can re-enable the lives cheat with Extra 99 lives.
GAVYNTEI-There are series of the Namco games, made by the same programmers Haruhisa Udagawa and Kumi Hanaoka, that contains the same self-test for the data integrity. To enable any of these tests you need a special device that should be plugged into the expansion port. The operation of that device is very simple. It should accept the data bit from the data input port and return it back inverted to the output data port. The device consists of 4-bit shift register, working as some sort of the FIFO buffer. The input bits are goes to the input and then shifted to te output after a 4 cycles. At the game's boot, it tries to send some special data to the device. If the data output doesn't match the data input inverted, then the game continues the normal operation. But if all data (usually 32, rarely 64 bytes) is matches, self-tests will be performed. The program calculates 24-bit partial checksums for the PRG (excluding the last 8K) and the CHR data, summing only every 15th byte, and comparing it against the etalon. Before testing of the PRG data, the background color turns red, before testing of the CHR data, it turns green. If any of these tests are failed, the program will jump directly to the reset routine. It means, one of these tests will be performed infinitely, but until the special device is plugged in, or until the test are passed. Normally, you'll see the red to green flash just before the game's boot. Or the static red screen if the PRG data is bad, or the flashing red to green screen if CHR data isn't good. Using this Game Genie code you can skip tests for the special device presence and jump straight to the integrity tests.

US version:

(BUR) GameGenie (added 04.07.14):
LVXXZAZA-At main game menu, hold A + B on controller 2, then press Start. There were an Extra lives cheat, but in the final release the number of lives given is the same as default, so there is nothing happens. With this code you can re-enable the lives cheat with Extra 99 lives.

Marble Madness

(BUR) Hidden text (added 20.10.12):
Every PRG bank in this game contains a particular copiright strings in the US version:
(C) COPYRIGHT 1988 RARE LTD. ENGLAND.
and
PAUL.P & RACHEL.M.E
and only one string in the European version:
(C) COPYRIGHT 1990 RARE LTD.
The initials stands for Paup Proctor and Rachel M. Edwards.

Mario & Yoshi, Yoshi, Yoshi no Tamago

English versions:

(UNI) Soft reset (added 04.07.14):
Any time during game press A + B + Select + Start on controller 1.

Mario is Missing!

(UNI) Password generator (added 06.12.13):
New York complete
Rome complete
Syndey complete
San Francisco complete
Tokyo complete
Paris complete
Montreal complete
Moscow complete
London complete
Buenos Aires complete
Mexico City complete
Cairo complete
Nairobi complete
Beijing complete
Random
Password:


Mario Open Golf, NES Open Tournament Golf

All versions:

(GEN) Credits (added 06.12.13):
At the title screen, hold Right + B + Select for a couple of seconds.
Source: ReyVGM

Japanese version:

(UNI) Continue (added 06.12.13):
Start a new "STROKE PLAY" game. When asked to confirm the game select ("YES" or "NO") hold A + B on controller 2. The game will continue from the last played match.

Mario's Time Machine!

(UNI) Password generator (added 06.12.13):
80m B.C. complete
776 B.C. complete
31 B.C complete
1192 complete
1520 complete
1602 complete
1687 complete
1862 complete
1879 complete
1903 complete
1905 complete
1947 complete
1969 complete
1989 complete
Random
Password:


Marvel's X-Men, Uncanny X-Men, The

(FIX) Final stage (added 16.04.15):
Beat the first four regular levels. Every level ends with a message. Every message has some special words. To reveal these words, beat more than 30 special enemies on the stage and specific letters will be displayed in red color. Combining them will reveal a secret message: "The last mission can be reached from the mission screen by pushing Select and seek the advice of the label to make it to the final mission." Code written on the label is Up + B + Start, so you must press Up + B + Select + Start to reveal a secret final stage. Need to mention, that main part of the code (B + Select + Start) should be entered on controller 1. But you may press Up either on controller 1 or controller 2, doesn't matter.
Source: tcrf.net

Mashin Eiyuu Den Wataru Gaiden

(BUR) Secret names (added 04.07.14):
デバッグ-The debug leftover secret name ("DEBUG"), normally can't be entered at the name entry screen, because it's in different kana type. If you hack it somehow, the debug mode will be enabled. This will disables the cutscene and script scenes, as well as random encounters. Also gives you complete set of unlimited magic. Hold B during game to free move throught any obstacles.

Masuzoe Youichi - Icchou Made Famicom

(UNI) Script debug (added 07.12.13):
During the game, hold A on controller 2, then press Up, Up, Down, Down, Left, Right, Left, Right on controller 1. Two numbers will appear, the first one is a chapter number, the second one is current event number. When you advance in the game, this number will increase.

Matsumoto Tooru no Kabushiki Hisshou Gaku

(FIX) Secret words (added 05.01.14):
Enter as a player name:
あんごうぱす-Password screen.
Enter "0" exactly 100 times for the secret message.
おんがく-Does nothing, seems disabled sound test.
ぴくちゃー-Picture test.
くれじっと-Credits.
Source: ReyVGM

(BUR) Hidden text (added 07.07.14):
There is a hidden copyright text in ROM:
MUSIC_KA Version 1.1 in 1987-11-1Copywrite by Softhans ,Tomohiro Hori


Matsumoto Tooru no Kabushiki Hisshou Gaku 2

(GEN) Password screen (added 07.12.13):
Hold A + B + Select + Start on controller 1, then press Reset. A password screen, otherwise unavailable on the title screen, will appear.
Source: ReyVGM

Mechanized Attack

(UNI) Debug menu (added 14.01.12):
At the title screen, hold Down + Left + B + Select on controller 1, then press Right + A + B on controller 2. Then release all the buttons. Additionally, you can remove the clothes of the girl, used as the cursor menu. Initially, girls is fully dressed. Set "PLAYER", "MAGAZINE", "GRENADE" and "CONTINUE" options accordingly to values described below, to step by step undress the girl: 1776, 1815, 1266, 6666. If you enter finally 4444, then screen will change to just a single pentagram and locks.

Mega Man, Rockman

(BUR) GameGenie (added 07.07.14):
PEXPIIAA-Re-enables some strange easter egg. Hold A on controller 2 while falling from any obstacles to change the landing animation.

Mega Man 2, Rockman 2 - Dr. Wily no Nazo

(FIX) Easter egg:
At the Stage select screen, hold A and choose a boss. When the next screen comes up that displays the boss and his name, the stars in the background will turn into birds.

Mega Man 3, Rockman 3 - Dr. Wily no Saigo!

NTSC versions:

(FIX) Freeze animations:
Hold Up + A on controller 2 to freeze some of the animations, including the rockman's hit animation or explosions, also it does work on some bosses. This debug leftover was removed from the European version completely.

(FIX) High jump and no death pits (added 07.07.14):
Hold Right on controller 2 to jump two times higher and faster during the game. This also affects the falling into the pits, instead of instant death you will land on the solid floor under the screen and can jump out of there unharmed up to the top of the screen. This debug leftover was removed from the European version completely.

Mega Man 4, Rockman 4 - Aratanaru Yabou!!

(BUR) GameGenie (added 07.07.14):
PAEAPEGE-Re-enables the palette editor, similar to those from part 5, but since there is no more debug code left, we don't know where it should be called properly.

Mega Man 5, Rockman 5 - Blues no Wana!

(BUR) GameGenie (added 07.07.14):
ATUKGUOZ (for the US version and the Japanese version)
ATUKZUOZ (for the European version)
-Re-enables the debug features. On controller 2, press Left to pause/unpause the game, press Up to pass through obstacles, press Right to restore your energy and edit the palette (with controller 1, change the palette, press Select to exit the edit mode and have your energy restored), press B to disable detection collision for the player.
Source: GSHI

Mega Man 6, Rockman 6 - Shijou Saidai no Tatakai!!

(BUR) GameGenie (added 24.12.09):
EZKKIVKG+LLVKATOL+AXEGLVTU-Re-enables the debug menu. Press A to show the menu after reset. Use controller to view sprites data, change palette and listen all in-game music and sounds in sound test.
Source: GSHI

Meiji Ishin

(UNI) Strategy mode:
At the title screen, press Up, A, B, Left, A, A, A, A, B, Right, B, A, Down, B, B, A + B on controller 2, then press A on controller 1 up to 8 and press Start. If done right, the game will start right from the strategy events, at the level according to how many times A was pressed.

Meimon! Dai San Yakyuu Bu

(UNI) Secret passwords (added 07.12.13):
みたいみ たいおわ りみたい-View Ending Sequence

Meimon! Takonishi Ouendan - Kouha 6 Nin Shuu

(UNI) Sound test (added 04.10.07):
At the very first briefing screen after selecting the game mode (start new or continue), before the map screen appears, hold A + B + Select + Start.

(UNI) Invulnerability (added 11.09.08):
At the map screen, select and enter "パスワード" option where your current password is displaying, then press Up, Up, Down, Down, Left, Right, Left, Right, B, A. A sound will confirm correct code entry. Enter this code one more time to toggle this cheat off. Every time you enter it, it will toggle on and off again.

(UNI) Credits (added 13.09.08):
After the game completion, at the "完" screen, press Up, Up, Down, Down, Left, Right, Left, Right, B, A, B, A, A, B, A, B, Right, Left, Right, Left, Down, Down, Up, Up.

Meitantei Holmes - Kiri no London Satsujin Jiken

(GEN) Picture test:
At the title screen, press A 30 times then press Start.

(UNI) Sound test:
At the title screen, press A 20 times then press Start.

(BUR) Gamegenie (added 05.01.14):
TEVGPGGZ-In addition to two known cheats, the game contains more disabled debug options. Using this code you can re-enable three more:
At the title screen, press A 5 times, then press Start to enable the Scene test mode.
At the title screen, press A 2 times, then press Start to enable rather glitched game mode with unknown meaning.
At the title screen, press A 8 times, then press Start to enable not working Sequence test mode.

(BUR) Hidden text (added 23.11.08):
There is a hidden copyright text in ROM:
1987. Another Ltd.


Meitantei Holmes - M Kara no Chousenjou

(GEN) Secret passwords:
シーントバシ-Scene select
ビージーエムガキキタイ-Sound test
エガミタイ-Go anywhere
エンディングガミタイヨ-Ending
Source: ReyVGM

Melville's Flame

(BUR) Hidden text (added 10.07.14):
There is a hidden copyright and version string inside the ROM:
Copy right 1987 by Hiroyuki Shimamurarevision 871015.00 for 「メルビル ノ タタカイ」.
Additionally, the SRAM test routine in this game uses string:
RAM part test ID


Menace Beach

(UNI) Skip level (added 21.04.10):
There are two different ways to trigger this cheat. First one: at the title screen, press Left, Select, Left, Left, Left, Left, Left, Left, Up, Up, Up, Up, Up, Up, Right, Right, Right, Right, Right, Right. When you press correct button (except the first one), white color changes to red. A sound confirms correct code entry. Then press B to trigger cheat and message "YOU BIG CHEATERHEAD!" will appear. Second one: start a new game, then press Up on controller 2 and Up + A + B on controller 1 at the same time, you will be returned back to the title screen if all done right, then start a new game. When cheat is enabled, during the game press B + Select on controller 1 to advance to the next level, up to ending animation sequence.

(UNI) Secret message (added 21.04.10):
Complete the game. When the ending animation sequence is over and a message "PRESS A TO REPLAY SCREEN, PRESS START TO RESTART GAME" appears, hold Down + Left + Select. When you holding these buttons, a sound will play 10 times then 5 times in row and the secret message will appear at the bottom of the screen.

Mendel Palace, Quinty

(GEN) Bonus levels:
Hold Select + Start and press Reset.

(UNI) Two player mode (added 11.07.14):
At the stage select screen during the single player game mode, press Select + Start on controller 2 to enable the two player game mode.

(BUR) GameGenie:
ZAKLSGAA (for the US version)
ZASLEGAA (for the Japanese version)
-Debug menu. At the title screen, hold B and press A to toggle the ingame debug flag on and off, press Start to enter the debug menu with invulnerability and stage select.
AUKXYXXT+LESZAXXT (for the US version)
ALEZLUXT+LAEZGUXT (for the Japanese version)
-In addition to the code above re-enables in-game debug features. Hold B and press A at the title screen, Start to pause, Start to advance frames, Select to unpause, Down + Select to swap layers, Select + Start to reset.
Source: BMF54123

Metal Fighter, Mei Loi Siu Ji (Sachen / Kinema Music / Color Dreams), Wei Lai Xiao Zi (Joy Van)

All versions:

(UNI) Extra 16 lives (added 25.01.10):
At the title screen, press Down, A, Up, A, then press any other button, except A. Start a new game before demonstration begins.
Source: Yakovlev Victor

Joy Van / Color Dreams versions:

(GEN) Level select:
At the title screen, press Select a number of times one less than that of the desired starting level, then press Start. There is no such cheat in Joy Van version with the Chinese title and in Joy Van / Kinema Music version.

Metal Flame Psybuster, Metal Mech - Man & Machine

(UNI) Level skip (added 18.11.12):
During the game, in the mech mode, press Start to enter the game menu. Enable the "METAL FLAME" option, while credits is displaying on the screen, press Left + A + B + Select + Start.

Metal Max

(BUR) Hidden text (added 11.12.08):
There is some hidden text in the ROM:
Program: FX-702P


Metal Slader Glory

(UNI) Secret passwords:
でばっぐ やろう★-Debug Mode
えりな もう おきなよ-Ending sequence
Source: Pennywise

Metroid

(GEN) Secret passwords:
NARPAS SWORD0 000000 000000-Invincibility and Infinite Missiles

Mezase Pachi Pro - Pachio-kun

(FIX) Secret message (added 04.02.13):
Start a game of pachinko, and press Select to open the pause menu. Select the third option and press Select 12 times. Then select the second option and press Start 12 times. Finally select the first option and press A. A secret message will appear. This also enables the Air Lever hack cheat automatically.
Source: ReyVGM

(FIX) Fever time:
Start a game of pachinko. Press Select to open the pause menu. Select the third option and press Select 12 times. Then select the second option and press Start 7 times. Finally select the first option and press A. A message will appear. Once in the game again, press Up + A + Start to enable Fever Mode. Note that Fever Mode can be enabled at the different time in different pachinko machines. This also enables the Air Lever hack cheat automatically.
Source: ReyVGM

(UNI) Hack the air lever (added 15.07.14):
Start a game of pachinko, and press Select to open the pause menu. Select the third option and press Select 10 times. Then select the first option and press A. A sound will confirm correct code entry. A coin will appear near the air lever in the bottom-right corner of the screen. Now you don't need to press the A button to throw the balls. Additionally, this fixing the air lever, so it won't slide by itself over time.

(UNI) Increase luck (added 15.07.14):
Start a new game, at the intro animation, wait for the Pachi-kun starts riding on the bike. While on ride, quickly press Select 10 times. A sound at the end of the route will confirm correct code entry. From now, all pachinko machines will operate at the 99% of luck, instead of random one, generated at the game start.

(BUR) Hidden text (added 04.12.08):
There is some hidden text inside the ROM:
/ Computer designed by Marionette co. / Programmed by Marionette co. / Staff: O.Takayuki, S.Yoshiaki, O.Masataka, I.Masanobu, I.Taka /
and
ii debugger ga hoshiiyo/dareka YHP no debugger kattekure/ongaku ga dasaiyo/graphic ga dasaiyo/onaka suitayo/nenuiyo/hayaku kaeritaiyo


Mezase Top Pro - Green ni Kakeru Yume

(UNI) SRAM clear (added 15.07.14):
Hold A + B + Select + Start, then press Reset.

(UNI) Ending sequence (added 07.12.13):
Hold Down + B on controller 1 and A + B on controller 2 at the same time, then press Reset. You can view additional ending scenes if hold Select and/or Start on controller 1 (noting - ending 1, Start - ending 2, Select - ending 3, Select + Start - ending 4).

(UNI) Debug mode (added 07.12.13):
Hold Up + B + Select + Start on controller 1 and A + B on controller 2 at the same time, then press Reset. The Debug mode disclaimer will appear. If you want it to be enabled, just wait. If not, press Reset again. If enabled, during the game press Select to enter the palette edit mode. In map mode, press Start to immediately win the current round.

(BUR) Hidden text (added 15.07.14):
The SRAM initialization routine in this game uses the string
SAILOR VENUS M.A
as valid data header.

MiG 29 - Soviet Fighter

(FIX) Secret words:
Enter one of following words as player name for the hi-score table:
"PETE...."-Bonus Life
"TOBY...."-Bonus Weapons
"LINUS..."-Multi Bonus
"PREVIEW."-Level Five Preview
"GLIMPSE."-Last Level Glimpse

(UNI) Level select (added 15.07.14):
At the title screen, when the "PRESS START" message appears on the screen, press Up, Down, Left, Right, then hold one of the following combinations and press Start to start from corresponding level.
A-Mission 2
B-Mission 3
A + B-Mission 4

(UNI) Smiley test:
Absolutely all games by Codemasters have internal PRG ROM and CHR RAM testing routines. So called "Smiley tests". Tests are normally enabled, but for triggering it needs pressing all D-Pad buttons. Hold Up + Down + Left + Right + A + Select + Start to enter the PRG ROM test or hold Up + Down + Left + Right + B + Select + Start to enter the CHR RAM test, and press Reset. A green smile means that test passed, red sad face - failed.

Michael Andretti's World Grand Prix, Nakajima Satoru - F-1 Hero

Japanese version:

(UNI) Secret passwords (added 07.12.13):
さとる*MN-M represents the Level number with letters あいうえおらりるれ (levels from 1 to 9).
N represents the round number. Each level have it's own maximum number or rounds.
Level 1 - 4 rounds, level 2 - 5, 3 - 6, 4 - 7, 5 - 8, 6 - 10, 7 - 12, 8 - 14, 9 - 16. So you can enter any of letters あいうえおらりるれろかきくけこや representing the allowed numbers from 1 to 16 accordingly.
For Example, password "さとる*れろ" will lead you to level 9 round 10. Unfortunately, level 9, round 16 password crashes the game.

US version:

(UNI) Secret passwords (added 07.12.13):
SAMMY*IJ-I represents the Level number with letters from A to I (levels from 1 to 9).
J represents the round number. Each level have it's own maximum number or rounds.
Level 1 - 4 rounds, level 2 - 5, 3 - 6, 4 - 7, 5 - 8, 6 - 10, 7 - 12, 8 - 14, 9 - 16. So you can enter any of letters A to P representing the allowed numbers from 1 to 16 accordingly.
For Example, password "SAMMY*IJ" will lead you to level 9 round 10. Unfortunately, level 9, round 16 password crashes the game.

Mickey Mania, China Rabbit Baby

(UNI) Stage select:
Hold A + B + Select at the title screen.

(UNI) JY company's Easter egg:
Press Up, Up, Up, Up, Down, Down, Down, Down, Left, Left, Right, Right at the title screen.

Mickey Mouse, Mickey Mousecapade

(FIX) Continue (added 11.07.14):
At the game over screen, hold at least one D-Pad button on controller 1 and press Start.

(GEN) Level warp:
At the title screen, hold Select and one of the following buttons, then press Start:
Up-Castle stage
Right-Ocean stage
Down-Pirate stage
Left-Woods stage

(BUR) Hidden text (added 11.07.14):
The RESET routine in this game uses string
KIKU
to check if game was soft or hard reset.

Micro Machines

All versions:

(UNI) Smiley test:
Absolutely all games by Codemasters have internal PRG ROM and CHR RAM testing routines. So called "Smiley tests". Tests are normally enabled, but for triggering it needs pressing all D-Pad buttons. Hold Up + Down + Left + Right + A + Select + Start to enter the PRG ROM test or hold Up + Down + Left + Right + B + Select + Start to enter the CHR RAM test, and press Reset. A green smile means that test passed, red sad face - failed.

Aladdin version:

(FIX) Extra 6 lives with qualify and credits (added 15.07.14):
Complete the Qualify race, no matter if you fail or qualify. Before the end of the race, hold Up + B + Select on controller 1. Continue holding these buttons and when the screen changes color, press Start on controller 1. A secret credits screen will appear. Press Start to continue the game qualified to challange with extra 6 lives.

Regular version:

(UNI) Extra 6 lives with qualify and credits (added 15.07.14):
Fail the Qualify race (you must finish 3rd or 4th). Before the end of the race, hold Up + B + Select on controller 1 and Right + A + Select on controller 2 at the same time. Continue holding all these buttons and when the screen changes color, press Start on controller 1. A secret credits screen will appear. Press Start to continue the game qualified to challange with extra 6 lives.

Might and Magic

(UNI) SRAM clear (added 07.12.13):
Hold Down + A + B on controller 2, then press Reset. While screen is black, release Down and press Up, Right, Up, Left. The previous saved game will be erased.

(BUR) Disabled cheat (added 07.12.13):
During name entry, hold Down + B on controller 2, then press A on controller 1. The jump after the check opcode was NOPed, so it's unknown currently, where it goes to jump.

Mike Tyson's Punch-Out!!, Punch-Out!!

All versions:

(FIX) Secret passwords:
075-541-6113-"Busy signal".
800-422-2602-"Busy signal" of Nintendo's customer service phone number.
206-882-2040-"Busy signal".

English versions:

(FIX) Secret passwords:
135-792-4680-"Another World Circuit" access. To enable this password hold Select and press A + B when you entered it.
106-113-0120-"Credits". To enable this password hold Select and press A + B when you entered it.
007-373-5963-"Dream Fight" with Mike Tyson.

Millionaire (Sachen)

(UNI) Secret message (added 10.04.10):
During player one turn, press Up, Start, Left, Select, Down, Select, Right, Start, Select, Select, Start. The secret message will appear.

Mindseeker

(BUR) GameGenie (added 05.02.13):
GEVTZPEI-Some of the Namco games, which uses the 19 mapper PCB, contains also the specific self-test routine. It can test and initialize the internal RAM buffers. Similar to the other Namco games series, in order to run these tests, you must plug in a special device to the famicom expansion port. This device is much simpier than mentioned another device. It just takes one bit of data and immediately returns it inverted to the data port, there is no FIFOs inside. When the program detects the device presence, it performs RAM test and initialization. If RAM is already tested/initialized, the screen will turn blue. If RAM isn't initialized, but after init and test all is fine, then screen will turn yellow or pink. If, even after the reinitialization, RAM test fails, then screen will turn red. After the tests, program goes to the infinite loop, so yo must unplug special device to boot into the game. Using this Game Genie code you can skip the special device check and just directly to the RAM initialization routine. This game tests it's IRAM buffer, used for the expansion sound.

Minelvaton Saga

(UNI) Debug mode (added 02.01.09):
At the title screen, press Up, Up, Down, Left, A, Left, Right, Down, Down, B, press Start and the title screen will change color to black. During the game, press Start to enable and Select to disable debug mode, which includes the faster movement speed and disables random encounters.
Thanks KeyBlade99 for corrections.

(UNI) SRAM clear (added 16.04.14):
Hold Up + Down + Left + Right on controller 2, then press Reset. Now, the program is waiting for A on controller 1 to be pressed. When you press it, if SRAM is properly initialized, a message オーケーです ("OK") will be displayed on the green background for a very short time, then game will continue. In other case, you'll see a message ダメ ラムエラー ("BAD RAM ERROR") on the red background. Press B and WRAM will initialize and message でんばんを オフしてください ("TURN THE POWER OFF") will appear, and background change it's color again.

Miracle Ropit's Adventure in 2100

(UNI) Continue (added 02.01.09):
After death on the level 2 and later, at the game over screen, press quickly A, A + B, Up + A + B, Down + A + B, B on any controller, you'll continue the game from the last played level with 3 lives.

Mirai Senshi - Lios

(UNI) Ending sequence (added 07.12.13):
Hold Up + A + Select on controller 1, then press Reset.

(UNI) Sound test (added 16.07.14):
Hold Up + B + Select on controller 1, then press Reset. Unfortunately, probably due to programmer's bug, if you exit from the Sound test with Start, you'll continue in rather broken highly glitched game.

(UNI) Instant continue (added 16.07.14):
Hold Down + A + Select on controller 1, then press Reset to jump directly to the saved previously game, skipping the title screen and intro.

Mirai Shinwa Jarvas

(UNI) Teleport to start (added 02.01.09):
During game, press Up, Up, Down, Down, A, B, A, B on controller 2 and you will be returned back to the starting point.

(UNI) SRAM clear (added 16.04.14):
Hold Up + Down + Left + Right on controller 2, then press Reset. Now, the program is waiting for A on controller 1 to be pressed. When you press it, if SRAM is properly initialized, a green message "OK!!" will be displayed on the for a very short time, then game will continue. In other case, you'll see a red message "NG!!". Press B and WRAM will initialize and message "PWR OFF" will appear.

Mission Impossible

All versions:

(UNI) Secret passwords (added 16.07.14):
LRHN-Level 1
KMVW-Level 2
XDGJ-Level 3
QBYZ-Level 4
HMPR-Level 5
TVJL-Level 6
YGKX-Computer level. To enable this password, hold Up + A + B on controller 2, then press A on controller 1. In other case, it won't be accepted.
MTKN-Computer password. Can be accepted only in the Computer level at the end of the game. This password will be given to you during the game.

(UNI) Invulnerability (added 16.07.14):
Select the continue option, enter password for Level 1 (LRHN), hold Left + A + B on controller 2, then press A on controller 1. You will start a new game invulnerable for a regular enemies attacks, but you still could be hit by the car, or be captured, etc.

(BUR) Hidden text (added 17.07.14):
There are a build dates of the ROMs in every version of this game:
MAST900417
-for the US version
MSTR910708
-for the European version
MSTR910718
-for the French version

European versions:

(UNI) Invulnerability (added 17.07.14):
Hold Up + Right + A + B on controller 2, then press Reset. This cheat added in the European version as a shortcut for the LRHN password cheat, but latter is still present in the game and can be used too. As against regular invulnerability cheat, you can use this one not only from the beginning, but from any level you could access with password, except the first one. If you enter the Level 1 password after enabling cheat this way, it will be disabled.

Mito Koumon - Sekai Manyuu Ki

(UNI) Quick password exit (added 17.07.14):
At the password screen, press A on controller 2 to immediately return to the title screen. This is a leftover from the developement stage of the game, other similar shortcuts was removed in the final version.

(BUR) GameGenie (added 17.07.14):
VTVUTVXT+ZPVUYVXV-Re-enables the map screen shortcut. Press A on controller 2 to skip directly to the next stage.
VTXSVXXT+ZPXSNXXV-Re-enables the in-game shortcut. Press A on controller 2 to complete current stage.

Mitsume ga Tooru

(UNI) Debug menu:
At the title screen, hold A + B on controller 2 and Select on controller 1 at the same time, then press Start.

(UNI) Level select (added 13.01.10):
At the title screen, hold A + B on controller 2, then press on controller 1 A, A, A, A, B, B, B, B, A, B, A, B, A, B, A, B.
Source: Yakovlev Victor

(UNI) Extra money (added 22.09.15):
At the stage number screen, on controller 1, hold Select, then press repeatedly two different D-Pad buttons one by one as fast as you can. For example, repeat Up, Down or Left, Right. Pause between pressings should be less than 1/8 second, but you could do it faster. If all is done right, every 8 button pressed the money counter will be increased by 1000 and you hear the sound. With this cheat you may obtain 2000-5000 at the beginning of every stage for free.

(BUR) GameGenie (added 22.09.15):
XTKGIZAV-Re-enables the debug ingame handler.
During the game, on controller 2 press:
A or B to increase money amount by 10 and 1000 correspondingly.
Left to toggle the CPU usage meter on/off.
Up to skip current level.
Right give all weapons, a bird and a powerful spear
Down to refill health bar.
ILVAGOOY+XAVAIPOA-Replaces the stage select cheat with the disabled one at the title screen. Hold A + B in controller 2, then press A, A, A, A, A, A, A, A. The color of the title screen letters will change to purple. Unfortunately, this is all what is left from appears to be a "Special mode" of this game. There is no code to use this cheat flag at all.

Mo Jie Ba Zhu (Nanjing, NJ079), Mo Jie Ta Shi (Nanjing)

(UNI) Secret message (added 21.05.14):
During the game, while in conversation mode, hold Up + Select + Start on controller 1 and skip with A to the end of the dialog. The copyrigh string will be displayed in the dialog box. This cheat can be found in a couple of Nanjing games on the same engine.

Moai-kun

(GEN) Stage select:
At the title screen, highlight Continue, then hold Down + Select, the cursor will return to the Start option, now press Start.
Source: ReyVGM

(BUR) Hidden text (added 17.07.14):
There is a hidden version info inside the ROM:
MAST891020


Mobile Suit Z Gundam - Hot Scramble

(UNI) Debug monitor (added 09.06.09):
At the title screen, on controller 2 press A, Up + A, A + B, Up + B, B, Right + B, A + B, Right + A, Right + A, Left + A, A + B, Down + A + B, Down + B, a message "MONITOR ON" appears instead of the hi-scores, but only if the title screen is renewed after the demo sequence. From now there is some debug features will be available. Instead of score string you can see one-byte memory viewer, while on pause you can change addresses by pressing Up or Down on controller 1 or buttons on controller 2, with Select on controller 1 you can advance game by frame by frame.

(BUR) Hidden text:
The RESET routine in this game uses string
by Kei Cross
to check if game was soft or hard reset.
Source: tcrf.net

Moero TwinBee - Cinnamon Hakase wo Sukue!, Stinger

Japanese version:

(FIX) Continue (added 07.12.13):
During 3 Players game, when any of ships is destroyed and "GAME OVER" is displayed, the player should hold button according to it's number: Player 1 - Up + A + B, Player 2 - Left + A + B, Player 3 - Right + A + B. Then player will instantly returned to the game. Do not allow to destroy more than one ships at once, this cheat only works if two other players are alive. The US version still has this cheat, but there is no 3 or 4 players game mode, so you couldn't do it.
Source: ReyVGM

Momotarou Densetsu

(UNI) Secret passwords (added 04.10.07):
すべてのきよくがききたいな-Sound test
すべてのてきがみたいな-Picture test

Momotarou Densetsu Gaiden

(GEN) Sound test and ending (added 29.10.15):
Complet all three scenarios of the game to unlock the hidden options "Sound Test" and "Ending" in addition to the Introduction menu option.
Source: KingMikeX

(UNI) Window Frame Design Room (added 07.12.13):
Hold Down both on controller 1 and controller 2, then press Reset.

Momotarou Dentetsu

(GEN) Secret words:
Enter first three names in the 3-player mode as in table below. Note: C1 player name is "モモタロ" by default, do not change it! Or else you couldn't enter it again:
C1:"モモタロ" C2:"おんがく" C3:"しつ"-Sound test
C1:"モモタロ" C2:"びじゅつ" C3:"しつ"-Picture test

Money Game, The

(UNI) Ending sequence (added 08.12.13):
At the title screen, hold Down + Left + A then press Start. While screen is black, press B, A, A, A, B, A, A, A, B, A, A, A, A, B, B, A, B, A, B, B, A, B, B, A, B.

(UNI) Stage advance skip (added 08.12.13):
During the game, press Select to enter to the Save Menu, select the second option, then hold Right + A + B on controller 2 and Right + B on controller 1 then press A on controller 1. From now, you can advance to the next stage without money counting.

(UNI) Competition mode (added 08.12.13):
During the game, press Select to enter to the Save Menu, select the second option, then hold Left + A on controller 2 and Left on controller 1 then press A on controller 1. Enter your ID and password and answer "Yes", the game will be switching to the competition mode.

(GEN) Extra 3 million yen:
First, go bankrupt. Then, on the game over screen, press A + B at the same time on both controllers. You'll go back to the title screen, start over and you'll have 3 Million Yen this time around.
Source: ReyVGM

Money Game 2 - Kabutochou no Kiseki, The

(UNI) Skip intro (added 18.07.14):
At the title screen, enter the "START" option, then select one of the game modes. Press A + B and keep it pressed before the game screen appears.

(UNI) Instant phone calls (added 18.07.14):
During the game, in some cases you couldn't make a phone calls. Hold A on controller 2 before call to avoid all restrictions.

(UNI) Market helpers (added 18.07.14):
During the game, click on the computer, select the second menu option (market trade), then hold A + B on controller 2 and press A on controller 1. An extra column will appear in the market list with some additional info to the prices.

(UNI) Instant Kohinata-san talk (added 18.07.14):
During the game, click on your notebook, select third option and then ask for talk with Kohinata-san (first menu option), sometimes you couldn't do it, because of late hours or he is gone. Hold A on controller 2 before entering first menu option to be able to speak with him any time.

(UNI) Kohinata-san talk (added 18.07.14):
During the game, go to speak with Kohinata-san as decribed above. Before talk, hold A on controller 2 to show the list of objects to select before talk.

(UNI) Kohinata-san talk (added 18.07.14):
During the game, go to speak with Kohinata-san as decribed above. Select the second option (persuasion), hold A on controller 2, then press A on controller 1 to always persuade.

(UNI) Extra 5 million yen (added 18.07.14):
At the game over screen (first game over), hold Up + A + B on controller 2 and press A on controller 1. The game will immediately start from the beginning with different intro sequence and you'll get 3 million yes at the beggining, instead of 2, as well as pretty secretary.

(UNI) Second chance (added 18.07.14):
At the game over screen (second game over), hold Up + A + B on controller 2 and press A + B + Select on controller 1. The game will return to the previously ended game with no money and day before the game over again.

Monster In My Pocket

(UNI) Skip copyrights:
When the copyright screen appears, hold A + B + Select and press Start to jump directly to the intro sequence.

(UNI) Sound test:
Right before the title screen appears, at the copyright screen hold Right + A + B and press Start. If you do not want to wait for copyrights screen disappear hold additionally Select.

(BUR) GameGenie (added 15.01.08):
GEKLXKGK (for the US version) GEKLOKGK (for the European version)-Re-enables the level select cheat. At the player number select menu, press Right, Left, Down, Up, A, B. A sound will confirm correct code entry. Then press Start. Note, the level 6-3 is inaccessible.

(BUR) Hidden text (added 19.07.14):
There is a hidden version text inside the ROM:
MAST911001


Monster Party

(GEN) Secret passwords:
055*N-Level select passwords. Just put any number from 0 to 7 at N place. Note, "*" denotes a skull.

Monster Truck Rally

(BUR) Hidden text (added 08.12.13):
At the very end of the ROM a simple copyright scring exist:
 by Rick Koenig 


Moon Crystal

(UNI) Stage select (added 01.01.08):
Hold Up on controller 2, then press Reset.

(UNI) Debug leftovers (added 19.07.14):
The Maclonna Mines stage boss have a leftover from the developement stage. Press A on B or Down on controller 2 to force the boss throw the rock for corresponding range any time. This is most probably was used for debugging throwing animation and wasn't removed from the final version.

Moon Ranger

(UNI) Unlimited continue (added 08.12.13):
Normally, after the game over screen you need to press A + Start to continue the game, but if you additionally hold Down, continue counter won't decreased, you can continue with pressed Down as much as you want.

(UNI) Invulnerability and Level skip (added 08.12.13):
After the game start, hold Up on both controllers, then press A + B on controller 1. Now some cheats are enabled, hold A and press Select to enable invulnerability. Return back to the game by pressing Select one more time. Or hold B then press Select to skip the current level.

Morita Kazuo no Shougi

(UNI) Start round from the beginning (added 21.07.14):
Normally, the game will track all played moves from both players and can restore the last played game after the reset or power off. If you hold B on any controller at the title screen, before the game start, the game will rewind to the very first move of this round, and you can track all the moves from the beginning using the replay mode, or start to play from any move. This is actually can be done with the replay mode itself, but with this cheat, you just jump to the beginning of the reound.

(UNI) Reset last played game (added 21.07.14):
At the title screen, hold Up + A + B, then press Start on controller 1. The last played game will be erased.

(BUR) Hidden text (added 21.07.14):
There are a hidden copyright and version strings inside the ROM:
MORITA SHOUGI (C)1987  RANDOM HOUSE
MORITA SHOUGI Ver 1.0


Mortal Kombat II/III Special (JY)

(UNI) JY company's Easter egg:
After the demonstration start, at the player select screen, press Up, Right, A, Down, Right, B, Up, Left.

Mortal Kombat V (YOKO)

(UNI) 2-Player mode (added 21.07.14):
During the 1-Player game, press A + B on controller 2 to switch the game to the 2-Player mode instantly and return back to the play selection menu.

Motocross Champion

(UNI) Secret passwords (added 21.07.14):
あまのんははら-Ending sequence
いいたんたこす-Game over sequence

Mottomo Abunai Deka

(BUR) GameGenie (added 08.12.13):
GEXKZKNY-Re-enables the Level Select cheat and invincibility. At the title screen, press any button and then Start to start a new game. After selecting number of players and introduction, a Level select screen will appear. Press A or B to change the Level number, press Start to start with it. Invincibility is enabled by default.
Actually, there was a cheat sequence at the title screen, P, Up, Down, A, A, B, Left, Right, A, test for it was removed from the final version of the game. The different cheat modes was intended to be enabled when you succesfully press at least 2 or 4 buttons in sequence. So, level select is enabled when you press 2 or 4 buttons, invincibility is enabled with you press at least 3 or 4 buttons. Total sequence is 8 buttons long, but thre is no more code that need so much buttons to press.

Mouryou Senki Madara

(UNI) Sound test:
At the title screen, press Down, Down, Up, Up, Right, Left, Right, Left, A, B.

Ms. Pac-Man (Namco)

(BUR) GameGenie:
EEOGAAAA-Re-enable the debugging features. At the title screen, press A + Select to enter the debug menu, use Left or Right to change the level. Press Select + Start to soft reset. Press A or B, to adjust level brightness.

(BUR) Hidden text (added 02.01.09):
The RESET routine in this game uses string
NAOKI HIGASHIO
to check if game was soft or hard reset. Naoki Higashio was programmer of "New Production" company developed this game. Also there is a hidden copyrigh message inside the ROM:
COPY RIGHT 19841993 NAMCO LTD.ALL RIGHTS RESERVED


Ms. Pac-Man (Tengen)

(GEN) Soft reset:
Press A + B + Select + Start during the game play to return to the game menu. Press A + B + Select + Start again to return to the title screen.

(UNI) Level skip:
Pause the game and press A, A, A, B, B, B, Up, Down, Left, Right, A, B, A, B, A, B, Up, Down, Left, Right, B, A, B, A, A, A, Up, Down, Left, Right. Now you can press Select to skip current level.

Muppet Adventure - Chaos at the Carnival

(BUR) Hidden text (added 08.12.13):
At the end of the NMI routine a string
nmitestmessage
exists.

Musashi no Bouken

(UNI) Sound test:
At the title screen, after message "push start" appears, press A, B, A, B, A, B, Right, Select. A sound will confirm correct code entry.

(UNI) Maximum level:
At the title screen, after message "push start" appears, press Select, B, A, Left, Right, B, Right, Select. A sound will confirm correct code entry.

Musashi no Ken - Tadaima Shugyou Chuu

(UNI) Slowdown the dog (added 25.06.08):
At the title screen, press Down + A + B on controller 1. A running through the screen dog will stuck, confirming correct code entry. From now the dog in game will be slower.

Mutant Virus, The

(UNI) Another quest (added 26.06.08):
At the title screen, hold Up + A + B + Select on controller 1, then press Start. An image of man in space suit changed as well as starting level.

My Life My Love - Boku no Yume - Watashi no Negai

(BUR) Hidden text (added 08.12.13):
At the end of the ROM a hidden copyright and version string:
Sirius Works 0051991.03.20


NARC

(FIX) Continue:
At the title screen, hold Up + A + B + Select + Start. When all lives are used, a countdown timer will appear instead of the game over message. Press Start to continue game play from the current location. To disable this cheat, when returned to the title screen press Up + A + B + Start.

NES Play Action Football

(BUR) GameGenie (added 09.12.13):
AENNONNY-Re-enables a simple debug feature, which is disables all collision detection with the player 1, so enemies couldn't to stop you while you running on the field. Unfortunately, this doesn't affect CPU AI itself, so you still couldn't win round easily.

Nagagutsu wo Haita Neko - Sekai Isshuu 80 Nichi Daibouken, Puss 'n Boots - Pero's Great Adventure

All versions:

(BUR) Hidden text (added 02.01.09):
The RESET routine in both regional versions uses similar strings
Masahiro
or
MASAHIRO
to check if game was soft or hard reset.

Japanese version:

(UNI) Player 2 reverse controls (added 11.07.14):
At the title screen, shout to the microphone on controller 2 10 times, then hold Down + Left + A + B on controller 2 and press Start on controller 1. Start a two players game. If done right, the second player's movement controls will be reversed. This strange cheat is exactly the same as in another game by the same developer: "Hokuto no Ken".

(BUR) Hidden text (added 07.07.09):
There is some hidden copyright text inside CHR ROM:
Program and Audiovisual Copyright 10/01/86 Shouei System Programmed by Masahiro.
"ACTOR".Yoshihara Yasuhide.Sakakura Pictured byKenichi."RINA".S
uzuki Makoto."TIYA TIYA PIRAYASHIMUN".Higa Naomi."PUTTSUN".Satoh
 Music by Kaori."LIONS".Aoki Ochakumi by Kyouko."MADONNA".Yoshin
o Mie."UMBRELLA".Takano
and at the end of the copyright message there is another one:
WATASHITACHINI AI WO KUDASAI .. COPY SURUNA ! Kono kurou wo wakattene !
which means "PLEASE, LOVE US, DO NOT COPY! Try to be in our shoes!".

US version:

(BUR) GameGenie (added 11.07.14):
GAUGIZAA-Re-enables the Stage skip cheat. During the game press Select to skip to the next level.

Nakajima Satoru - F-1 Hero 2

(UNI) Secret passwords (added 09.12.13):
さとる*MN-M represent the Level number with letters あいうえおらりるれ (levels from 1 to 9).
N represents the round number. Each level have it's own maximum number or rounds.
Level 1 - 4 rounds, level 2 - 5, 3 - 6, 4 - 7, 5 - 8, 6 - 10, 7 - 12, 8 - 14, 9 - 16. So you can enter any of letters あいうえおらりるれろかきくけこや representing the allowed numbers from 1 to 16 accordingly.
For Example, password "さとる*れろ" will lead you to level 9 round 10. Unfortunately, level 9, round 16 password crashes the game.

Nakayoshi to Issho

(BUR) GameGenie (added 09.12.13):
PESNNYAA-Re-enables a lot of debug features.
First of all, hold Start and press Reset to enable a Sound test.
Hold Up and press Reset to enable a Room test.
Hold Down and press Reset to enable a Message test.
Hold Left and press Reset to enable a Battle test.
At the title screen, hold Left then press A to enable fast movement. One more title screen cheat does nothing, but still functioning: hold B + Select + Start then press A.
At the name entry screen hold combination of Start, Select or Up, select "END" option then press A to jump to the corresponding level.
Select - Level 1, Start - Level 2, Select + Start - Level 3, Up - Level 4, Up + Select - Level 5, Up + Start - Level 6.

(BUR) Hidden text (added 09.12.13):
During development a name "Nakayoshi" of the main person was written down to the end of ROM and first letter of this name was used by the debugging code to determine if this is a debug or the final version. To disable debugging functions, this letter should be erased, so we see now in current game version, only:
 akayoshi
was left from the name at the end of the game ROM.

Namco Classic II

(UNI) Instant round restart (added 21.07.14):
During the game, in the stand up mode, hold A + B, then press Select to restart current game from the beginning.

Namcot Mahjong 3 - Mahjong Tengoku

(BUR) Hidden text (added 09.12.13):
The RESET routine in this game uses string
BAKAY
to check if game was soft or hard reset.

Nangoku Shirei!! - Spy Vs Spy

(FIX) Freeze the computer:
While playing versus the computer. Hold A or B on controller 2 and yell at the microphone on the same controller. If done right, the computer will freeze for a few seconds. If you freeze the opponent on top of a hazard, all his energy will be depleted.
Source: ReyVGM

(UNI) Sound box:
Right before level ends, at least one A and one B on any controller should be held. If done right, sound box will appear. While in "sound box" mode, press A on controller 2 for resetting music and pause.

(UNI) Staff:
While in "sound box" mode hold Right + A + B on controller 2 to switch to "Staff" mode. Just shift cursor to the second page and return it back and you'll see two staff screens.

Nantettatte!! Baseball

(UNI) Credits:
At the title screen, when the message "PUSH START" appears, press Up, Down, Left, Right, Up, Down, Left, Right, B, B, B, A.

(UNI) Soft reset:
During the game, press quickly Start then Select.

(BUR) GameGenie (added 30.11.13):
XVEAPGAV-The version info, hold A after reset to see the version info.

(BUR) GameGenie:
These features was disabled in final release, but with GameGenie codes you can access each of them by entering cheat code for the Credits.
ILVULLKO+XLVUGUVZ-Tilemap and sprite test
XIVULLKP+XLVUGUVZ-CHR test
IGVULLKP+NZVUGUVX-ROM and DROM self-test
TTVULLKO+ELVUGUVZ-Sound test
PGVULLKP+OLVUGUVZ-Backup RAM test (clear all SRAM memory)
SAVULLKP+EGVUGUVZ-Error handler

Napoleon Senki

(UNI) Sound test:
At the game setup screen, press Left + A + B on controller 2.

Napoleon's War (Waixing)

(BUR) GameGenie (added 22.07.14):
XVXTTIAV-Re-enables the generic type of debug display for many of Waixing's games. Unfortunately, the fonts are removed or doesn't displayed properly, so you can't actually see the number parameters.

Navy Blue

(UNI) Sound test (added 13.12.07):
After completing the game, at the "Presented by I'MAX" screen, press Up, Up, Down, Down, Left, Right, Left, Right, B, A, Select.

(UNI) Password generator:
PositionField
Random:
Password:


Ne Zha Chuan Qi (Nanjing, NJ036)

(UNI) Secret message (added 21.05.14):
During the game, while in conversation mode, hold Up + Select + Start on controller 1 and skip with A to the end of the dialog. The copyrigh string will be displayed in the dialog box, but the proper graphics or text was removed from this version of the game. This cheat can be found in a couple of Nanjing games on the same engine.

Nekketsu Kakutou Densetsu

(GEN) Sound test:
At the title screen, hold Left + Select then press A.

(GEN) Final battle:
At the title screen, hold Right + Select then press A. Select "STORY MODE" to advance to the final battle.

(GEN) Select same character:
At the title screen, hold A + B on controller 2 and press Start on controller 1 to allow both players to select the same character in "BATTLE MODE".

(FIX) Special team select:
Enter the "BATTLE MODE" then select the "NO CHARACTER EDIT" mode. At the team member select screen, hold one of the following combinations, then press A to fight with corresponding special team:
Right + Select-Toraji
Left + Select-Toraichi

(UNI) Password generator:
Note, you can not set any of the names used in the game by other CPU characters as your name while creation your character. Also that names can not be used in password. But there is one exception: name "くにお" allows you to play as Kunio itself. He have 5th unique blood type.
Blood type:
Name:
Birth:-Month-Day
Level:
Team:
Bits:
Random:
Password:


Nekketsu Kouha - Kunio-kun, Renegade

(GEN) Stage Select:
At the title screen, enter one of the following button codes to start with the desired stage, then start a new game.
Hold Left on controller 2 and press Down, Up, Right, Up, Left, Up on controller 1-Stage 2
Hold Down on controller 2 and press Up, Down, Left, Down, Right, Down on controller 1-Stage 3
Hold Up on controller 2 and press Down, Down, Up, Up, Right, Left on controller 1-Stage 4

Nekketsu Koukou Dodgeball Bu - Soccer Hen, Nintendo World Cup

(BUR) GameGenie (added 20.06.08):
There is some common feature in some Technos games like "SAMPLE VERSION" flag, allowing you to have some extra or debug features in game. Depending var is at $FFF6 address and uses some bits set to enable hidden features.
PENYVYAA-Bit 0. Enables B/W screen mode.
AKNYVYAA-Bit 6. You can pause any text sequence in game by pressing B on controller 2 at any script movie.
EKNYVYAA-Bit 7. Enables "SAMPLE VERSION" mode. In this mode some debug features available:
You can select the game stage by pressing A on controller 2 at the level number screen.
You can select any enemy team screen at the "timeout" screen by pressing A on controller 2.
In game hold on controller 1 Select then press on controller 1 A to win current match, or press B to get timeout, or press Up to loose.
In game hold on controller 1 Select then press on controller 2 one of these buttons: A, B, Right, Left when ball near of yours or the enemy's gates to get the control of the goalkeeper or sort of. ;)

Nekketsu! Street Basket - Ganbare Dunk Heroes

(UNI) Password generator (added 15.02.16):
Story mode:
TeamGuestHome
New York
San Francisco
Texas
US Navy
Havaii
Las Vegas
Florida
Random:
Password:


New Ghostbusters II

(GEN) Secret menu:
At the title screen, hold A + B, then press Start.

New York Nyankies, Rockin' Kats

(GEN) Pause cheats:
During the game, press Start to pause game play. Press one of the following button codes to get corresponding effect.
Hold Down + A + B on controller 1, press Start-Easy mode. Gives to you 6 lives and maximum energy.
Hold Up + A + B on controller 1, press Start-Expert mode. Gives to you 0 lives and minimum energy.
A, A, A-Exit from the levels 1 to 5 to the main menu. If you play level 6, you'll be returned to the start of the level 6 instead.

(UNI) All items (added 23.07.14):
During the game, press Select to enter the items menu. Hold Down + A + B on controller 2, press Start or A on controller 1 to exit this menu. A sound will confirm correct code entry.

(UNI) Debug leftovers (added 23.07.14):
Enter the Bonus Games TV channel at the main game menu, then choose to play Roulette minigame (const $50). While roulette is start spinning, but before the progress bar on the right gets filled, hold Up + Left + A + B + Select on controller 1. This causes roulette to stop always on number 8. Regardless of prize is set to this sector or not, you will be thrown away with no bonus. The jump animation for this case is very odd, so it can be suggested this is an animation debug leftovers, since there are no profit for using this cheat.

(UNI) Secret passwords (added 07.01.08):
US|Japan-Effect
F♊GHTB♋SS_|たたかえてきたおせ_-Boss fight. Insert a number 1 to 5 instead of "_" to select one of the 5 game bosses, excluding the last one.
♉ND♊NG5♥♥♥|みせておくれみせて5-Ending sequence.
M♈PH♈RDM♈P|きついねこれきついね-Final Level 6 and Last Boss fight.
P♋W♉R★♌P!!|くれアイテムくれくれ-All items.
G♉T!M♋N♉Y$|ほしいおかねくれくれ-Extra 5000 money.
K♈TS50K♈TS|ねこ50ねこ50ねこ-Extra 50 lives.

Nichibutsu Mahjong 3 - Mahjong G Men

(FIX) Nichibutsu mode (added ReyVGM):
At the game mode selection screen, hold B and you can select the fourth game mode, "Nichibutsu". Don't release the B until press A.

Nigel Mansell's World Championship Challenge

All versions:

(BUR) GameGenie (added 10.12.13):
Both the US and the European versions contains a full set of text resources for 5 languages. However, you can select a language in the European version only after the title screen, but the title screen itself is always in english in both regional versions. Surprisingly, the title screen and the copyright logo screens are have it's own language resources, and you can select them by using one of following GameCodes in any regional version of this game. For the US version this also enables the whole locked language set for the rest of the game, although for the European version you can change it after the title screen.
PEUGPAAA-Enables French title screen and logo
ZEUGPAAA-Enables German title screen and logo
LEUGPAAA-Enables Italian title screen and logo
GEUGPAAA-Enables Spanish title screen and logo

US version:

(BUR) GameGenie (added 10.12.13):
TPOZPSTA-Re-enables the Language select screen for the US version. Note, that the language resources are full of bugs and partially in english, so assuming this resources an early version of the final release resources.

Nightshade

(UNI) Soft reset (added 17.04.10):
Press Up + Down + Left + Right + A + B + Select + Start.

Nihonichi no Mei Kantoku

(UNI) Secret words (added 10.12.13):
Enter one of the following words as a player name.
きんたろう-By default, the starting player parameters are 450/450/500/500, with some additional bonus points
not less than 100. If you enter your name with all the same
characters (if you do not care much about the game), then your additional bonus points will
be always 40, so you need enter at least one or two different symbols in your name. But if you enter this
secret name, you'll start with all parameters set to 998, however with just 1 bonus point.
あるふぉんす-Debug mode. During the game your opponents have only 4 different non-random deliveries, cycling,
you can skip any catch/delivery by pressing B + Select. Enter the ingame menu by pressing A, select top option,
hold Select then press A to bring up the debug menu, where you can select memory/stats/data viewer or warp
to the next round. Enter a new tournament, at the game setup menu, select second option, hold Select then press
A to enable the auto game option.
おふし゛やん-Doing something with stats after a winning round. Purpose isn't clear.
とーいす゛-Doing something with stats after a winning round the same way, but at different side. Purpose isn't clear.

Ninja Cop Saizou, Wrath of the Black Manta

Japanese version:

(UNI) Invulnerability:
Before the title screen, press B, B, Select, A, Up, Select, Right, Start. A "MUTEKI" message will appear at the bottom part of the screen.

(FIX) Stage select and Boss rush (added 17.01.14):
At the title screen, press one of the following button codes to begin from the desired stage.
Down, Up, Down, Up, B, A, Down, B, Start-Stage 1
A, B, A, A, A, Up, Down, B, Start-Stage 2
Select, A, B, B, A, Select, Down, Up, Start-Stage 3
Right, Right, Down, Down, Up, Up, B, Select, Start-Stage 4
Down, Right, Left, B, A, B, Select, Select, Start-Stage 5
Up, Left, Left, Right, B, Select, A, Select, Start-Stage 6
A, B, A, Select, Select, Select, Right, Up, Start-Boss Rush
Source: ReyVGM

US version:

(BUR) GameGenie (added 05.03.14):
ZGSNAUOE+OYSNPLUN (for the US version PRG1)
EEENTXNL+ENENYZXN (for the US version PRG0)
ONEUOXXU+AKEUEZKU (for the European version)
-Re-enables the debug stage/boss select mode. Just press Start at the title screen. Press A or B to select a level number. A numbers from 1 to 6 represents the regular levels, numbers from 81 to 86 - the boss levels. Press Select to start with invincibility, press Start to start the regular game.

Ninja Crusaders - Ryuuga, Ninja Crusaders

(BUR) GameGenie (added 10.12.13):
GANNUSGK-Re-enables the invulnerability cheat. Pause the game, press A to enable invulnerability, press B to disable it again any time.

(BUR) Hidden text (added 10.12.13):
Unused date sting is present at the end of the ROM:
R O23 MAY 1990


Ninja Gaiden, Ninja Ryukenden, Shadow Warriors

(FIX) Sound test:
At the title screen, or any time during the Intro, hold Down + Left + A + B + Select, then press Start.

(BUR) GameGenie (added 25.07.14):
AZUTYSXT+OTUVASXV+EGUVPSXT (for the US version)
AZXTGSXT+EGXTTSXT+OTXTISXV (for the Japanese version)
AXKTYKGZ+OVKVAKNN+EKKVPKNY (for the European version)
-Re-enables the old Stage select and Sound test mode. The Stage select will appear after the Act number screen. Hold A and press Left or Right to change the stage number. Press Start to start. To enable the sound test, at the Act number screen hold Up + A + B and press Start. Use the same controls to play music and sounds as for the Stage select. To exit the Sound test, play music index 00. In the european version due to general code changes, you couldn't see actual text, but the code is still working.

Ninja Gaiden 2 - The Dark Sword of Chaos, Ninja Ryukenden II - Ankoku no Jashin Ken, Shadow Warriors Episode II - The Dark Sword of Chaos

NTSC versions:

(GEN) Sound tests:
Hold Up + Left + A + B + Select and press Start at the title screen, the Ryu character will appear. Press Start, wait until the title screen fades out, press Start again, hold Up + Left + A + B + Select and press Start to display Irene Lew. Finally allow the title screen to fade out and appears again twice, use the same cheat to display Ryu and Irene Lew and allow all music from the game to be played with a volume and song title display.

(BUR) GameGenie (added 28.07.14):
AZUGVSGZ+GLUGNSNY+KIUKESNN (for the US version)
AZUKKSGZ+PLUKSSNY+KIUKVSNN (for the European version)
-Re-enables the Stage select mode. The number will appears after the Act number screen. Hold A and press Left or Right to change the starting level. Press Start to start from selected level. This code is still present in the Japanese version, but can't be restored easily.
SXVTGXGZ+NUVTIXNN+PKVTTXNN+
EEVTYXGZ+SEVVAXNY+NUVVPXNN (for the US version)
OKSVIXGK+AXSVTZNT+ESSVYZXT (for the European version)
-Re-enables the invulnerability cheat. Pause the game, press Select to toggle invulnerability on and off. This cheat can be restored only in western versions, but the invulnerability flag ($00BF) is still can be enabled by setting value $80 in the Japanese version.

European version:

(UNI) Sound tests (added 28.07.14):
The Sound test cheat is the same as in all NTSC versions, but the button code to enable it is different. You must press Down + Left + A + B + Select, instead of Up + Left + A + B + Select to enable any of three Sound tests.

Japanese version:

(UNI) Ending easter (added 28.07.14):
After beating this game and when the final credits is over. At the "THE END" screen, press Right + B + Select. An extra ending sequence will be displayed with the final messages from the two final bosses. This easter were completely removed from western versions.

Ninja Gaiden 3 - The Ancient Ship of Doom, Ninja Ryukenden III - Yomi no Hakobune

All versions:

(BUR) GameGenie (added 03.07.08):
ENNNOYAY-No cutscenes mode.
AENNOYAY-Re-enables debug mode.
After reset you will be able to listen to the music and the sounds. Hold A then press Up or Down to change low digits of sound number, hold B then press Up or Down to change hi digits of sound number, press Select to play selected sound, press Start to start game from level with the corresponding number and invulnerability cheat enabled. To toggle invincibility during the game on and off, press Start then Select.

US version:

(UNI) Extra 99 continue (added 07.01.08):
Wait until the title screen fades out then press Start, repeat this 8 times, then hold Up + Left + A + B + Select and press Start.

(BUR) GameGenie (added 13.03.16):
AENLSVNY-Re-enables the extra ending message, disabled in the US version.

Japanese version:

(GEN) Extra credits (added 13.03.16):
After beating the game, at the "The End" screen, wait 18 minutes to see the extra hidden message "TO BE CONTINUED".
Source: tcrf.net

Ninja Jajamaru - Ginga Daisakusen, Squashed (Prototype)

Japanese release version:

(UNI) Sound test (added 28.07.14):
At the title screen, press A, Up, Down, B, Left, Right, Up, Up on controller 2.

(UNI) Stage select (added 28.07.14):
At the title screen, press Up, Down, Left, B, A, A, Up, Right on controller 2. Select the stage number, press Start to begin a new game from the selected stage.

Japanese beta version:

(UNI) Sound test (added 28.07.14):
At the title screen, press A, A, B, B on controller 2.

(UNI) Ending sequence (added 28.07.14):
At the title screen, press B on controller 1.

(BUR) Unfinished stage select (added 28.07.14):
At the title screen, press B, B, A, A on controller 2. A select stage number screen will appears, you can select any number, but can't play from it.

All versions:

(UNI) Intro easter (added 28.07.14):
At Jaleco logo screen, before the title screen, hold A on controller 2 to stop the Jaleco logo from moving down and stand still on the screen.

(BUR) GameGenie (added 27.03.12):
NNNYEYAE-Re-enables the debug display. After entering this code, part of game HUD with scores will be replaced with 12 huge digits plus 2 small digits in the middle. Digits displays various variables or game flags in real time.

Ninja-kun - Ashura no Shou

(UNI) Freeze hi-score:
At the title screen, press A, B, A, B, B, A, B, A.

Ninjara Hoi!

(UNI) SRAM clear (added 11.12.13):
Hold Select + Start then press Reset. The SRAM save data will be erased.

Nintendo World Championships 1990

(UNI) Timer test (added 28.07.14):
At the title screen, on controller 2, hold A, then press Select.

(UNI) Skip Super Mario Bros (added 28.07.14):
At the title screen, on controller 2, hold B, then press Select. This allows you to start right from the Rad Racer game, so you can spend more time for this game and Tetris and finally get more points, but at the results screen the SMB results will be all zero.

Noah's Ark

(UNI) Cheat mode (added 11.12.13):
At the title screen, press Up, Left, Left, A, Down. A small number will appear at the middle of the screen. Press Select to change it from 0 to 6, press Start to start from level with corresponding number. Press Select + Start during the game to skip current level. Also you'll get unlimited lives.

(BUR) Hidden text (added 01.03.15):
The RESET routine in this game uses string
JASONBASIN
to check if game was soft or hard reset.
Source: tcrf.net

Nobunaga no Yabou - Sengoku Gunyuu Den, Nobunaga's Ambition 2

(GEN) Sound test (added 22.02.10):
At the title screen, when the Daimyo slideshow starts, press Select and the words "Push Start Button" appears. Then press B to activate the Sound test or press A to see the Samurai & Ronin slideshow.

North & South

Japanese version:

(FIX) Sound test:
At the "KEMCO presents" screen any time, press Up, Up, Down, Down, Left, Right, Left, Right, B, A.

US version:

(FIX) Sound test:
At the "KEMCO presents" screen, when the text displaying is over, press Up, Up, Down, Down, Left, Right, Left, Right, B, A.

Nuts & Milk

(UNI) Secret message (added 24.04.07):
Start a new game, press Start to pause it, then hold Right + B on controller 2 and Left + A + B + Select on controller 1, then press Start. "VERSION 1 1984 05 29 BY KIKU" appears. "KIKU" is a programmer of HUDSON Kikuta Masaaki (菊田昌昭. He put secret codes with messages almost in all his games under HUDSON label."

Ochin ni Toshi Puzzle Tonjan!

(UNI) Music control (added 30.07.14):
During the game, on controller 2, press A to cycle throught the 4 different background melodies, press B to toggle music off and on.

(BUR) Hidden text (added 30.07.14):
There is a hidden copyright text inside the ROM:
COPYRIGHT1989...NIHON MICOM KAIHATSU C1989


Oishinbo

(BUR) GameGenie (added 31.07.14):
AIXSGYTK-Re-enables a picture test feature. During the game, press Select to enable it. Use the D-Pad buttons to select a picture. This catually may crash the programm. Press Start to return back to the game.

Olympic IQ (Sachen)

(UNI) Stage select (added 29.06.13):
At the title screen, press A, B, Up, Down.

Operation Secret Storm

(UNI) Level skip (added 29.06.13):
At the map screen or during the game, hold Up on controller 2 and Up + A on controller 1 then press B on controller 1. This will enable the level skip cheat. Now any time during the game, hold B then press Select on controller 1. Total 12 stages are available, after 12th, you will return back to the stage 1.

Operation Wolf

US version:

(BUR) Debug mode (added 01.08.14):
Set RAM address $009B to any non-zero value to enable a debug leftovers. This will re-enable the stage select with gunsight, gunsight shot display debug (white square). Also you can press Right on controller 2 at the stage select screen to instantly play the extra attack level. During the game press Select on controller 1 to instantly loose the game.

Japanese version:

(UNI) Debug leftovers:
At the title screen, press Up, Down, Right, Left, A, B, Down, Up. This will set the Debug flag, the same as in the US version, but in the Japanese version most of debug features are absent, the only functionality present is a gunsight shot display position debug (white square) at the stage select screen.

Orb 3D

(GEN) Cut fuel consumption by half:
Press A, B, Left, B, A, Right on the intermission screen between levels or before level 1 begins. Fuel use will be at half of normal.

Osomatsu-kun

(BUR) Hidden text (added 29.06.13):
The RESET routine in this game uses string
Yoshikawa
to check if game was soft or hard reset.

(BUR) GameGenie (added 29.06.13):
AESNENNY-Re-enables the simple debug mode. In this mode the password option at the title screen will lead to the stage select screen. To enter the normal password screen, hold B before pressing Start. Additionally, you will have 10000 money at the beginning of the game.

Over Horizon

All versions:

(GEN) Change graphics:
Hold A + B on controller 1 and press Reset. Menu cursor will change to confirm correct code entry.

(UNI) Level skip (added 08.01.08):
Hold Right + A + B on controller 2 and press Reset. While in game, hold Select on controller 1 then by pressing A on controller 2 advance to the next level.

Japanese version:

(GEN) Sound test:
Hold Up + Select + Start on controller 1 and press Reset. There is no such cheat in the European version.

(BUR) GameGenie:
ITXIAVTT-Enable unused game scene, seems used to be some alternative ending scene draft. Just press Start at the title screen to see it instead of the game start.

Overlord

(GEN) Extra credits:
At the title screen, or at the "Virgin" logo, press any button except Start to enable an extra credits screen with "Probe" logo and main staff names and pictures.

(GEN) Intro skip:
Before starting a new game, hold Left. This will skip the intro messages.

P'radikus Conflict, The

(UNI) Hi power weapon:
During flight mode, press Start to pause the game and press B, Up, Right, A, Down, Left, a sound will confirm correct code entry.

Paaman - Enban wo Torikaese!!

(UNI) Stage select (added 06.08.14):
Power the console off, hold one of the following button combinations on controller 1, then power the console on. At the title screen, select the "CONTINUE" option to start from the corresponding stage.
A-Stage 2
B-Stage 3
A + B-Stage 4
Select-Stage 5
A + Select-Stage 6

Paaman Part 2 - Himitsu Kessha Madoodan wo Taose!

(UNI) Software reset (added 06.08.14):
During the game, there is a "P" doors with various rooms. At the rooms with boxes, if you press Select + Start, you'll immediately return to the title screen.

Pac-Land

(BUR) Hidden text (added 02.01.09):
In addition to generic NAMCO buried copyrights, RESET routine in this game uses string
MR HIROKI AOYAGI
to check if game was soft or hard reset.

Pac-Man

(BUR) Hidden text (added 24.11.08):
In addition to generic NAMCO buried copyrights, RESET routine in this game uses string
HIROKI AOYAGI
to check if game was soft or hard reset.

Pac-Mania

(UNI) Extra 10 continues (added 28.06.13):
At the game over screen, press Up + A + Start on controller 1.

Pachi Com

(BUR) Hidden text (added 03.10.07):
The game ROM contains interesting hidden text in the Japanese language and in its South dialect. Some of programmers complaining about dumb director or stuff member, says about hidden pachinko sound stuff that "sounds better" and so on. Finally it says that similar message contain version of this game for MSX computer, but that message completely in South (Okinawa) dialect. ;)
Copyright 25/Sep|"T"shano        |kuseni henna    |================|monda !!!
/85 by Bear's   |DEG/NANA/KOYA   |oto bakari wo   |================| --------------
Programmed by   |TEMEI RA wa mae |ireyou to shite |"N"sha san wa   | --------------
Bear's Ver1.0   |ni itta kototo  |pachinko no oto |"I"sha no PROS80|NANDE 6502 no
Y.Sakakura      |chigau koto     |wo mushi suruna!|de kaihatsu     |decimal mode wo
Y.Suzuki        |bakkari iuna AHO|TAMA no oto ga  |shite irunokana?|nuitano ?
A.Abe           |TEMEI raga itta |kikoenai noga   |YOKU anna henna |decimal computer
T.Katoh         |kara TETSUYA    |sonnani iinoka !|machine(3"FD) de|nanoni .....
M.Yoshihara     |shite tsukutta  |MAENO oto mo    |tsukuru yona !  |Mask no kiri
Y.Kishimoto/MSX |noni "maeno hou |nokoshite aru   |OEKAKI mo ana wo|machigai ja nai?
Pictured by     |ga yokatta"     |node kikitai    |nazotte kakuno  |================
Makoto.Higa     |nante iunjanei! |nara naoshitene |kana ?          |MOSHIMO korewo
================|KONNA tsumaranai|HEX address no  |ANA wo nazoru   |mita hitowa "H"!
KOKOKARA SAKIWA |bonus stage &   |?? wo data ?? ni|noga iyana kata.|MSX no PACHICOM
IITAI HOUDAI !! |tamazumari wo   |?- wo data ?? ni|Bear's no OEKAKI|nimo MESSAGE ga
Kikakuno JPM no |darega yaru to  |sureba mashina  |machine(ROM) &  |arimasu .....
Mr.GOUHARA wa   |omotte irunda ! |oto ni narimasu.|debugger wo 500 |"H" na hitowa
nan nimo shinai |SELECT de JOY wo|(Tiger_V&Kugi)  |man YEN de uri  |katte mitene !
kuseni iro iro  |migi ni sureba  |"T" sha no aho  |masuyo....      |Tadashi RYUUKYUU
iiyagatte URUSAI|futsuu wa +1    |to GOU no Baka !|Tel 03-864-6880 |hougen desuyo !
YAROUDA BAKA !  |sarerunda baaka!|yoi oto wa dare |KIREI na E no   |MITANOWA NAISHO
 -------------- |OTO no kaisha no|demo wakarundai!|tame nara yasui |NI SHITENE !!!


Pachi-Slot Adventure 2 - Sorotta-kun no Pachi Slot Tanteidan

(UNI) Luck adjust 1 (added 11.12.13):
During the slot-machine play, after inserting of coins, hold A then press Down.

(UNI) Luck adjust 2 (added 11.12.13):
During the slot-machine play, after inserting of coins, hold B then press Down.

(UNI) Luck adjust 3 (added 11.12.13):
Some slot-machines doesn't have this option. During the slot-machine play, after inserting of coins, hold Start then press Down. For one slote-machine session only one cheat is allowed, if you enter any of this cheats, it will stay enabled until you exit the slot-machine session.

Pachio-kun 2

(UNI) Force people to move along (added 11.12.13):
During the game, some NPC are sitting in front of slot-machines and leave it only after a while. If you can't wait, talk to it, but to finish conversation, instead of A hold Up + Down then press B, NPC will immediately move along. The same is for any NPC blocking your way.

(UNI) Get read of all people (added 11.12.13):
During the game, hold Up + Down then press Select. All people on the level will disappear.

(UNI) Play top-level pachinko (added 11.12.13):
During the game, stand before any pachinko-machine, hold Up + Down then press A.

Pachio-kun 3

(UNI) Cheat mode (added 11.12.13):
First you must enable the cheat mode. Hold A both on controller 1 and controller 2 then press Reset. During demo sequence or at the title screen hold B both on controller 1 and controller 2 then press Start on controller 1. A sound will confirm correct code entry. This cause a different effects during the game.
Now you can force people to move along if they sit or blocking your way. Talk to them, and at the end of conversation hold Up + Down then press B.
Also select any pachinko-machine, when asked "YES" or "NO", select "YES", then hold Select and press A to enable the pachinko-machine selection mode. You can press Up or Down to select machine type, Left or Right select machine level, press B to enable "rock", press A or Start to start pachinko-machine.
Do the same as previous, but hold Select + Start before selecting "YES". All machines of this type will be instantly beaten.
Additional cheat can be enabled if you did the first one. When game just started, Pachinko-King will speak to you. When his introducing conversation is over, hold Select + Start then press A to move to the map screen. Now return back to the Pachinko-King to solve the final puzzle and finish the game with all 15 houses beaten at the higher rate. Also, this will cause a total AI cancelation in all houses, no one is able to move or use any pachinko-machine, although they can speak with you, but you no need to force them to move along.

Pachio-kun 4

(UNI) Cheat mode (added 12.12.13):
Due to similar engines, the cheat for this version mostly the same as for Pachio-kun 3. To enable cheat mode press A both on controller 1 and controller 2 at the controller selection menu. During demo sequence or at the title screen hold B both on controller 1 and controller 2 then press Start on controller 1. A sound will confirm correct code entry. This cause a different effects during the game.
Now you can force people to move along if they sit or blocks your way. Talk to them, and at the end of conversation hold Up + Down then press B.
Even more, you can get rid of all people in the house, just hold Up + Down then press Select while in house.
Also select any pachinko-machine, when asked "YES" or "NO", select "YES", then hold Down + Left + Select and press A to enable the pachinko-machine selection mode. You can press Up or Down to select machine type, Left or Right select machine level, press B to enable "rock", press A or Start to start pachinko-machine.
Do the same as previous, but hold Select + Start before selecting "YES". The machines of this type will be instantly beaten.
Additional cheat can be enabled if you did the first one. At the main game menu, while selecting a start or contiue game options and settings, hold Select or Start or both then start a game. If done righ, a total AI cancelation in all houses will be enabled. No one is able to move or use any pachinko-machine, although they can speak with you, but you no need to force them to move along.

Pachio-kun 5

(UNI) Cheat mode (added 12.12.13):
Due to similar engines, the cheat for this version mostly the same as for Pachio-kun 3/4. To enable cheat mode press A both on controller 1 and controller 2 at the controller selection menu. During demo sequence or at the title screen hold B both on controller 1 and controller 2 then press Start on controller 1. A sound will confirm correct code entry. This cause a different effects during the game.
First of all, when creating a new save after enabling this cheat, you'll get extra 500 coins to a new save slot.
Now you can force people to move along if they sit or blocks your way. Talk to them, and at the end of conversation hold Up + Down then press B.
Even more, you can get rid of all people in the house, just hold Up + Down then press Select while in house.
Also select any pachinko-machine, when asked "YES" or "NO", select "YES", then hold Down + Left + Select and press A to enable the pachinko-machine selection mode. You can press Up or Down to select machine type, Left or Right select machine level, press B to enable "rock", press A or Start to start pachinko-machine.
Do the same as previous, but hold Select + Start before selecting "YES". The machines of this type will be instantly beaten. At some point this will cause also an instant win for some pachinko-machines without even using a cheats.
Additional cheat can be enabled if you did the first one. At the main game menu, while selecting a start or contiue game options and settings, hold Select or Start or both then start a game. If done righ, a total AI cancelation in all houses will be enabled. No one is able to move or use any pachinko-machine, although they can speak with you, but you no need to force them to move along.

Palamedes

(GEN) Sound test:
At the title screen, hold A + B on controller 2 and press Start on controller 1.

(GEN) Ending sequence:
At the title screen, hold Right + A on controller 2 and press Start on controller 1.

Palamedes 2 - Star Twinkles

(UNI) Sound test:
At the title screen, hold A + B on controller 2 and press Start on controller 1.

Panda Prince

(UNI) Copyright screen 1:
At the title screen or at the player select menu, press Up, Left, Down, Down, Right, Right, Left, Up.

(UNI) Copyright screen 2:
At the main menu, press Left, Up, Right, Right, Down, Down, Left, Up.

(UNI) Level select:
Find and enter a hidden bonus room on any stage, then just press Start, a small number appears in the middle of the screen. Press Up or Down to change the number, press Start to start from the selected level.

(BUR) GameGenie:
AANGAIPA-Switch the game to "Chinese" mode. All text messages, story and the title screen will change to the Chinese language.

Panda World

(UNI) Level skip (added 25.01.10):
Pause the game and press Select to enable cheat mode, then press Up, Up, Down, Down, Left, Left, Right, Right, A, A, B, B. Press Start to advance to the next level. If you enter code wrong, just press Select again in pause mode for reset cheat entering sequence, and enter code again.

Panic Restaurant, Wanpaku Kokkun no Gourmet World

(UNI) Extra 1 life (added 13.11.08):
During the game, when no more lives left and scores are divisible by 200 (eg 200, 600, 2200, etc.) as well as exactly 50 seconds left on the timer, press Start to pause the game, then press A + B, and a single extra life will be obtained.

Paperboy

Japanese version:

(UNI) Extra 7 lives (added 26.01.14):
During the game, when no more lives left, press Start to pause the game, then hold Up, press A, press B, release Up, hold Right, press B, release Right, hold Up, press A, release Up, hold Left, press B, release Left, hold Down, press B twice, release Down, hold Right, press A.

Parallel World

(UNI) Secret passwords (added 11.08.14):
All numbers are correspond to the certain tiles with patterns on the password screen. A blank tile (without pattern) is a number 0. Each number means how much times you should press A to reach the desired pattern.
5 1 1 6
9 1 1 7
2 0 0 2
3 0 0 3
-Sound test
5 1 1 6
2 5 6 2
2 0 2 2
4 1 3 2
-Ending sequence
5 6 5 6
4 0 0 3
5 0 0 6
4 3 4 3
-Unlimited lives

Parasol Henbee

(UNI) Secret passwords (added 28.06.13):
えあわせ-Boss Minigame 1
すもうき-Boss Minigame 2
すもうし-Boss Minigame 3
むてきさ-Invulnerability
としひこ-Game over message
もとひろ-Game over message
しんんん-Game over message

Parasol Stars - The Story of Bubble Bobble 3

(UNI) Unlimited Continue:
At the title screen, press A, B, B, A, Left, Right, Left, Right. A "c" letter will appear in the upper left screen corner.

(BUR) Hidden text (added 13.11.08):
Most of the games programmed by Ocean shares the same music driver library all along with the hidden version and copyright string:
MUSIC DRIVER V1.0 (C)JONATHAN DUNN & OCEAN SOFTWARE


Paris-Dakar Rally Special

(UNI) Debug mode:
At the title screen, press Up, Up, Down, B, Right, Left, Left, Start. You will obtain an extra 99 lives every level automatically. During game, press Select + Start to skip current level.

Perfect Bowling

(UNI) Music select (added 12.08.14):
At the player setup screen in any game mode, press Select to cycle through the background music or switch it off.

(UNI) Split mode (added 12.08.14):
Select the Training game mode, setup the player's name, hand and bowl weight. Before press A on controller 1 to complete the player setup, hold B on controller 2. In this mode the field setup for each round is predefined and it will be always the split setup, where the bottles will be always placed separately. This is training for the skilled players.

(BUR) GameGenie (added 10.12.10):
AENNONNY-Re-enables a different title screen, which is used in unreleased US version of this game. Though, there is no according CHR bank with proper data, so the title shows only garbage.

Perfect Fit

(BUR) GameGenie (added 08.10.08):
PASZSYAA-Normally, you can play this game alone, with computer or with another player. When you play with computer, it's name is always "ELECTRO" and its player number always 2. But game designed with another player controlled by computer with player number 1 in mind. It's name is "LI'L BIT" and it's always out of business. With this game genie code you can enable it as player 1 in two player mode with computer. In this mode two computers will play themselves, but second one will with empty name since game is not designed for two computer players.
GGOPPOLK+XPOPZOOO-There is the test screen called "DEMONSTRATION SCREEN" left inside of the release ROM, a leftover from the development stage. With this code you can re-enable it instead of the copyrights screen. This screen is waiting three times longer than copyrights screen and can be skipped by pressing any button.
UEEOKZXA+YENPVXKX+XKKPEXVV-In addition to the previous code, this codes re-enables the timer on the "DEMONSTRATION SCREEN", which counts the time is left before the screen is disappear.
AXXOSOSA+PXXOVOUS+VXXONPZE-This codes re-enables an additional string on the copyright screen with build date: "20TH SEPTEMBER, 1989.". Seems it was planned to release in Japan in 1989 year, but cancelled.

Pescatore (Prototype)

(UNI) Soft reset (added 12.08.14):
During the game, press Select + Start to reset the game.

(UNI) Credits (added 12.08.14):
At the title screen, press Select to see the credits. Press A at the last credits screen to play various sound efffects.

Pesterminator - The Western Exterminator

(UNI) Invulnerability and level select (added 12.12.13):
During the game, hold Up on controller 2 and on controller 1 hold Up + A, then press B. Release all buttons, now any time you can hold A and press Select to enable invulnerability or hold B and press Select to skip current level.

(UNI) Unlimited continue (added 12.12.13):
At the game over screen, hold additionally Down, then press A + Start to continue the game without decreasing the continue counter.

Phantom Fighter, Reigen Doushi

(BUR) GameGenie (added 12.12.13):
GEKZUOGK (the Japanese version only)-Re-enables a secret name. If you enter now the name "むてき", you'll be invulnerable and can go through the doors without beating the phantoms.
PEVZSPAA (the Japanese version only)-In addition to previous code, this will also gives to you an extra 99 scrolls and all items.
AAXZVZPA (the US version only)-Force the Invulnerability mode, similar to described above, but without extra scrolls and items.
GENGNKGK (for the Japanese version)
GAOGNSGK (for the US version)
-Re-enables a level skip cheat. Just press Down on controller 2 during the game.
GAEGUSGK (for the Japanese version)
GAXGUSGK (for the US version)
-In addition to previous code, this will also re-enables the jump back to the previous level by pressing Up on controller 2.
GASTAYZA+XISTINGA+OLSTTNNE(for the Japanese version)
GANVYYZA+SNETGNGE+OUETINNA(for the US version)
-Re-enables the Demon Fight mode debug window. During Demon Fight, press A or B on controller 2. Since there is not known, where it should be called, code caused some glitches. In the US version all text still in Japanese, so you couldn't actually read it.

Pictionary

(BUR) Abuse filter (added 09.01.08):
No one of the following words you could enter as any part of the player's name: "FUCK", "SHIT, "CUM", "FART", "BASTARD", "TIT", "PISS", "CRAP", "BALLS", "PRICK", "ASS-HOLE", "FAGG", "CLIT", "TURD", "JERKOFF", "DICKHEAD", "BITCH", "AHOLE", "ANUS", "BOOB", "BONER", "BREAS", "DIKE", "DONG", "DILDO", "JERK", "HOMO", "HORNY", "MOTH", "MOOK", "ORAL", "PECKER", "PENIS", "PUSSY", "QUEER", "SEX", "SHLONG", "SUCK", "VAGINA".

(BUR) Hidden text (added 02.12.08):
This game using for padding some info about developers.
PICTIONARY       1989
      PROGRAMMER   TONY POMFRET
      ARTIST       CRAIG HOUSTON
      MUSICIAN     TIM FOLLIN
======== SOFTWARE CREATIONS LTD
  FIRST FLOOR  2 4 OXFORD ROAD
MANCHESTER  M1 5QA
GREAT BRITAIN
TEL 061 236 1154
FAX 061 236 824


Pinball

(BUR) Hidden text (added 15.06.12):
There is a hidden copyright message inside the game ROM for all versions except VS:
BY S.MATSUOKA & S.IWATA


Pin Bot

(GEN) Pause menu (added 14.08.14):
During the game, press B on controller 2 to enter the Pause menu, where you can switch on and off music, speech or sound effects, using the controller 2.

(BUR) Hidden text (added 08.02.13):
There is a hidden copyright text inside the ROM:
 (C) COPYRIGHT 1988 RARE LTD. ENGLAND.


Pipe Dream

(UNI) Cheat mode (added 09.06.11):
During the game press Start, continue holding Start then press A, B, B, A, release Start then press any button to return to the normal game. Now, press B to pause time, press Select to release time flow again. This will also gives an unlimited wrenches, as well as automatic jump to the next round even if you failed in this round.

(UNI) Soft reset (added 09.06.11):
Press A + B + Select.

Pirates!

(UNI) Hall of fame reset (added 28.06.13):
At the hall of fame, press Right + B + Select.

(UNI) Saved games reset (added 28.06.13):
At the first copyright screen, hold Right + A + B + Select until the title screen appear.

Plasma Ball

(UNI) Sound test (added 14.08.14):
At the title screen, select the "1 PLAYER" option, hold Left + A + B on controller 2, then press A or Start on controller 1. Use controller 1 to select and play the background music, use controller 2 to select and play sound effects.

(BUR) GameGenie (added 10.12.10):
PENNOYAA-Re-enables the debug mode. Some additional info will be displayed at the game field while in battle. There are 12 hex numeric characters in row, some of chars are missing though.

Platoon

(UNI) Secret words:
Enter one of the following words as a player name at the hi-score screen:
KOMADA-Sound test
SUZUKIKUN-Ending sequence
HIROKUN-Ending sequence

(BUR) GameGenie (added 15.08.14):
ZONAPEIZ+XENAZEOS-Partially re-enables the stage edit mode for the "Jungle Confrontation" level. Press Start during this stage to enter the edit mode. Use controller 2 to move or place obstacles on the stage. Due to some address changes, you couldn't switch the stages by pressing B on controller 2, to make it work there is more hacking heeded.

Pocahontas

(UNI) Stage select:
Before the title screen appears, press A + B + Select + Start.

(BUR) GameGenie (added 18.08.14):
ZAXEPEXY+OAXEZAEA+EPXEIAEO+YLXAIAZS-Re-enables the test menu, similar for a couple ot Taiwanese games by the same developer.
Just press Reset. Right before the test menu, a small copyright screen "FC SYSTEM" will appears and message "LIBRARY READY!" will flash for a couple of seconds. Under the "(C) COPYRIGHTS" string there is another string "EI-HOW YANG", but it's colored the same as background and you couldn't see it.
The "LEVEL MAP TEST" menu item doesn't work here, unfortunately.
ZLNZKEYZ+GESZXOGK-Re-enables the starting logo "DIESNY INTERACTIVE".
GAXEZEGK-Re-enables a partially working Demo Recording development feature, before every demo replay.

Pocahontas 2 (Super Game)

(UNI) Debug mode:
At the title screen, press Up, Left, Down, Right, A, A, B. Pause the game and press A + B, move the character to any place of the map, press Start to return to the normal game at the new position.

(UNI) Level select:
At the title screen, before pressing Start, hold one of the following buttons:
Down-Level 2
Left-Level 4
Right-Level 6

Pocket Monster (Early Super Game)

(GEN) Debug mode (added 18.08.14):
This game has Debug mode enabled by default. During the game, press Start, then use the D-Pad buttons to place the character at any part of the stage or press Select to skip current level instantly. This cheat were intended to be enabled with the button code A + B during pause, the code still there and you can hear the sound if it triggered.

Pocket Monster Red (Waixing)

(UNI) Secret message (added 18.08.14):
During the game, any time press Right + A + B + Select + Start on controller 1 to see a secret copyright message.

Poke Block, Mahjong Block

(UNI) Stage select (added 13.12.13):
At the options menu, highlight the "LEVEL" option, then press Down + A to cycle the level number from 0 to 8, press Down + B to cycle the sublevel number from 0 to 4 and finally press Up + Down to add 10 to the level number up to 30.

Poker Mahjong

(UNI) Easter egg (added 10.04.10):
Select the "FOR ADULT" game mode (third option at the title menu), on the screen with the game and the password menu options, press A, B, Up, Down, Left, Right, Select, Select, Select, Select.

(UNI) Cheat mode (added 10.04.10):
During the player's turn, pause the game then enter code Up, Up, Down, Down, Left, Right, Left, Right, B, A. A sound will confirm correct code entry. Now you can select any card instead of getting the random one. Enter this cheat one more time to toggle the game back to the normal mode.

Pokemon Gold (Mars)

(UNI) Easter egg (added 13.12.13):
During the game, enter the menu by pressing Select then press Left + A + B + Select + Start on controller 1. A "MARS" logo screen will appear.

Pole Chudes (Chudov)

(UNI) Secret message (added 18.08.14):
At the difficult selection screen, press Right + A on controller 1, a sound will be heard, now you can should press Start to return back to the selection menu or press Left + B on controller 1 to show the secret copyright message from the developer.

Power Blade, Power Blazer

All versions:

(FIX) Sound mode:
At the title screen, hold Left + A + B on controller 2 then press Start on controller 1.

(BUR) Hidden text (added 19.01.09):
There is a hidden message inside the game ROMs:
TOSHIKAZU IWASA


Japanese version:

(UNI) Power Boomerang:
At the title screen, press Left, Up, Right, Down, Up, Up, B, A, B, A, Start.

US version:

(UNI) Password generator:
Current sector:
Level:
Ration:
Progress:Sector 1 
Sector 2 
Sector 3 
Sector 4 
Sector 5 
Sector 6 
Rations:Sector 1 
Sector 2 
Sector 3 
Sector 4 
Sector 5 
Sector 6 
US Password:


Power Punch 2

(FIX) Round skip (added 20.08.14):
When the picture of the next opponent appears, hold Select and press Start .

Power Rangers III

(UNI) JY company's Easter egg:
At the title screen, press Up, Right, Up, Right, Right, Right, Up, Left.

Power Rangers IV

(UNI) JY company's Easter egg:
At the title screen, press Up, Right, Up, Right, Right, Right, Up, Left.

Predator

All versions:

(GEN) Suicide at normal level (added 20.08.14):
Any time during normal levels, press Start, then A or B.

(UNI) Skip normal mode levels (added 06.08.11):
Any time during normal levels, hold Left + Right, then press A or B.

(UNI) Skip big mode levels (added 20.08.14):
Before entering the big mode levels, hold Up + Down + A and wait until the normal level number screen appears.

Japanese version:

(BUR) Sample ROM:
In the Japanese version the text block with message "PREDATOR SAMPLE ROM" exist, but there is no script entry to put this message on the screen in the final release. All English versions haven't these strings.
000119A0: 0A 22 5F 61 54 53 50 63 5E 61 FF 00 22 F1 FF 4A ..PREDATOR.....;
000119B0: 22 62 50 5C 5F 5B 54 F1 61 5E 5C FF 00 22 F1 FF .SAMPLE.ROM.....
000119C0: EA 20 62 63 50 56 54 FF 00 20 F1 FF 2A 21 5F 5B ..STAGE.......PL


President no Sentaku

(UNI) Counters cheats (added 21.08.14):
At the title screen, press Start to jump to the title menu, now press A and B in any order for a corresponding number of times (see the table below) to enable a couple of different effects or game modes.
A 2 times, B 2 times-Sound Test
A 3 times, B 3 times-Ending Sequence
A 6 times, B 6 times-Warp to the game level 2
A 10 times, B 9 times-Warp to the game level 3
A 13 times, B 3 times-Warp to the game level 4
A 4 times, B 4 times-Extra event at the end of the day 1
A 6 times, B 2 times-Extra event at the end of the day 2
A 8 times, B 2 times-Extra event at the end of the day 3

(BUR) GameGenie (added 30.06.09):
NXVVXKZX+VVVVUKSV-Re-enables "GAMEN TEST" instead of "SOUND TEST", allows you to see all game dialogs, menus and events, some of them rather glitchy.

(BUR) Hidden text (added 02.11.08):
Game ROM contain some hidden copyright text:
1989ANOTHERltd.
and
Another Ltd. 1989/6/09 New バージョン
Also this game uses the string
HOT-B
as a SRAM signature.

Prince of Persia

(UNI) Password generator (added 25.07.08):
Level:
Time:
Random: 
Password:


Pro Action Replay

Version 1.2:

(UNI) Secret message (added 23.04.10):
Hold Select then enter to the main menu. A screen with the program version, copyrights, date and checksum will appear.

Pro Sport Hockey, USA Ice Hockey in FC

Japanese version:

(UNI) Sound test:
Hold Select + Start, then press Reset.

US version:

(BUR) GameGenie:
IEKNZYYO-Re-enables the "Sound test".
Just press Reset.

(BUR) Hidden text (added 22.08.14):
The RESET routine in this game uses string
TakePong (1992-)
to determine if it was hard or soft reset. Also, the password decoding string here is
PassWordChecker


Pro Yakyuu - Family Stadium '87

(FIX) Credits (added 23.08.14):
At the title screen, hold A or B or both on controller 1 then press Start.

Pro Yakyuu - Family Stadium '88

(GEN) Credits:
At the title screen, hold A + B on controller 1 then press Start.

(BUR) GameGenie (added 23.08.14):
XVXNUPAV+XTKLSIAV-Re-enables the simple memory viewer/editor. You need a 4-player adapter for the famicom, to use it. On Controller 3, press Select to enable the memory viewer/editor, use the buttons on Controller 3 to change address and data, press Select again to disable it.

(BUR) Hidden text (added 23.08.14):
There are a generic Namco copyrights inside the ROM, partially used to determine if game was hard or soft reset
COPYRIGHT 1986,1988 NAMCO LTD.ALL RIGHTS RESERVED 88.9.2 KISSIE


Probotector II - Return of the Evil Forces, Super C, Super Contra

All versions:

(GEN) Sound test:
At the title screen, hold A + B and press Start.

(BUR) Hidden text (added 23.08.14):
There are a build dates of the ROMs in every version of this game:
MAST891129
-for the US version
MAST920331
-for the European version
MAST891005
-for the Japanese version

US version:

(FIX) Extra 10 lives:
At the title screen, press Right, Left, Down, Up, A, B.

Japanese version:

(FIX) Extra 30 lives:
At the title screen, press Right, Left, Down, Up, A, B.

(UNI) Level select (added 02.02.12):
At the title screen, hold Down + Select then press Start. Select area number then again press Start.

Punisher, The

(GEN) Credits (added 25.08.14):
Every fifth demo loop (copyright screen, shot animation, title screen, period...) will start with the Credits screen instead of the Copyright screen. Otherwise this screen can be seen after the completing the game.

(FIX) Mission select screen codes (added 30.10.07):
At the any mission selection screen, enter one of the following button codes on controller 2 to get the corresponding effect. A sound will confirm correct code entry. Each code can be entered limited number of times as well as they can be combined with each others.
Left, Right, A, Right, B, Up, Up, A-Maximum lifebar (can be entered 4 times)
Right, A, B, B, B, A, Left, A-Extra 999 submachine gun rounds (can be entered 2 times)
A, B, B, Up, Up, Left, Down, A-Extra 25 bazooka rounds (can be entered 2 times)
Up, A, A, A, A, Left, Left, Down-Extra 999 assault rifle rounds (can be entered 2 times)
Down, B, A, B, Up, Down, Down, Right-Level skip (can be entered once, but effect is permament, just press Select during the game)

(UNI) Maximum percentage (added 25.08.14):
At the "STAGE COMPLETED" screen, quickly hold Down + Right + B on controller 1 before the percentage counter is displayed. If done right, the percentage counter will be 100, no matter if you doesn't shoot anybody. So you can instantly obtain a maximum bonus.

(UNI) Easter egg (added 25.08.14):
After completing the game, at the final Punisher's line ("WELL, MY JOB'S FINISHED..."), hold Up + B + Select on controller 1. You'll see the scary Punisher's face.

(BUR) Hidden text (added 25.08.14):
There is an hidden copyright string inside the ROM:
PROGRAMMING BY JAMIE RIVETT

Source: tcrf.net

Puyo Puyo

(GEN) Sound test:
At the main menu, hold Up + A + B then press Start.

(GEN) Different background graphics:
At the main menu, hold Down and press Start.
Source: ReyVGM

(UNI) Unused password entry mode (added 25.08.14):
At the password screen, select the fourth password character to edit (do not change the first three!), select a letter, hold Select and press A or Start. To the right of the password a new string ended with "0" will appear. Every time you press A or Start while holding Select at this position, a new letter will be added to this string. You can't return and change previously entered symbols, there are 8 symbols total to enter. When finish, enter last three characters of the password as usual, but do not change the "?" in the first one!. Now, hold Select and press A or Start. The programm will compare the sum of particular chars in 8-symbol string you entered with corresponding character you entered at the password string and if they match will display the "PASSWORD OK!" message. However, there is no purpose in this sting here at all in the final version of the program. To test this, just enter the secret pass "00000000" as described above, then enter password "?000" and the check will pass.

(UNI) Password generator (added 15.09.14):
Level:
Random:
Password:
Secret password:
Check code:


(BUR) GameGenie (added 14.12.13):
EAENEYAA-Re-enables the different game mode cheat. Hold Up + A + B + Select + Start then press Reset. Now the title screen will change it's color and in 2 players mode two limits 42 and 60 will be changed to 50 and 80 accordingly.

Puzslot

(UNI) 2-Player mode patterns change (added 26.08.14):
Enter the 2-Player mode menu, hold Up and press Start. This will change the slot patterns and rise difficult of the game.

(FIX) Different story:
At the title screen, press B, B, B, B, B, A, A, A, then hold Up and press Start. This not only changes the slot patterns and difficult of the game, but changes the cutscenes between levels. Only one single cutscene is available in this mode after the final round, and it's fantasy themed.
Source: ReyVGM

(GEN) Extra stage select:
At the title screen, press B, B, B, B, B, A, A, A, then hold Down and press Start. If done right, you'll be able to select levels 5, 10, 15 and 20.
Source: ReyVGM

(UNI) Demo record leftovers (added 26.08.14):
At the title screen, hold Up + Down + Left + Right + A + B + Select + Start and wait until the demonstration starts. This will likely won't work always, since the current game programm doesn't allow Left + Right pressed at the same time, but if you being lucky enough, the button combination will pass. Anyway, there is not much left from the demo record code, you doesn't even able to stop the record and replay it anymore. But the recorded data will be saved to the SRAM and can be read later.

Puzznic

(UNI) Secret passwords (added 26.08.14):
FCPZ-"PUZZNIC" mode Stage select
ZZ1C-"GRAVITY" mode Stage select

Pyokotan no Dai Meiro

(BUR) GameGenie:
ZEEIVAPA-Re-enables the debugging screen. Just press Reset.

Pyramid (Sachen)

Sachen-Hacker version:

(UNI) Picture test (added 07.04.10):
At the title screen, press Up, Down, Left, Right, Up, Down, Left, Right. You can see the game's nude picture as well as edit palette.

Pyramid II (Sachen)

(UNI) Secret message (added 10.04.10):
During the game, press Up, Up, Up, Up, Up, Up, Up, Up, Select, Select, Select, Start.

Q Boy (Sachen)

(GEN) Stage select and Sound test:
At the title screen, simply press Select to go to a screen that lets you start at any level or cutscene and listen to the game's music.

(GEN) Mario character (added 27.08.14):
During the game, press Start to pause the game, then press Select to toggle between Q-Boy and Mario characters.

Q-bert

(FIX) Unlimited continue:
Hold Up + Select on controller 1 and Down + B on controller 2 at the same time, then press Reset, while the copyright screen is displayed, press Left on controller 2.

Qi Guo Da Zhan (Nanjing, NJ029)

(UNI) Secret message (added 21.05.14):
During the game, while in dialog mode, hold Up + Select + Start on controller 1 and skip with A to the end of the dialog. The copyrigh string will be displayed in the dialog box. This cheat can be found in a couple of Nanjing games on the same engine.

Quarter Back Scramble

(UNI) Sound test:
At the title screen, after the message "PUSH START" appears, hold A and press Right, Up, Left, Down, Right, Down, Left, Up. Release A, hold B and press Right, Up, Left, Down, Right, Down, Left, Up again. Because the cheat counts only correct pressings, but not care about the wrong ones, just hold first A then B and roll over D-Pad buttons for a couple of times while holding it.

(UNI) Minimal game time (added 27.08.14):
At the Game Time select menu, point the menu cursor to the last option "5 MINUTES". Hold Down on controller 1 and Up + Select on controller 2. Now press B on any controller to change this option to "1 MINUTES". This cheat can be performed with other button combinations on both controllers, since the program combines input from both controllers at the same time.

(UNI) Autoplay (added 27.08.14):
Select a 2-Player game, at the Game Time select menu hold Up + B on controller 2, then press A on Start on controller 1. As against the "WATCH" mode, you couldn't select the attack of defence strategy, but you still need skip all this screens manually.

Quattro Adventure (Codemasters)

Main menu:

(UNI) Smiley test:
Absolutely all games by Codemasters have internal PRG ROM and CHR RAM testing routines. So called "Smiley tests". Tests are normally enabled, but for triggering it needs pressing all D-Pad buttons. Hold Up + Down + Left + Right + A + Select + Start to enter the PRG ROM test or hold Up + Down + Left + Right + B + Select + Start to enter the CHR RAM test, and press Reset. A green smile means that test passed, red sad face - failed.

Super Robin Hood game:

(UNI) Extra 4 lives (added 25.01.10):
At the title screen, hold Left + A then press Start.
Source: Yakovlev Victor

Boomerang Kid game:

(UNI) Credits (added 27.08.14):
Immediately after the Codemasters logo very quickly press A, B, Select, Start before the title screen appears.

Treasure Island Dizzy game:

(GEN) Controller 2 (added 27.08.14):
At the title screen, press Start on controller 2 to play the game with controller 2.

(UNI) An extra rubber snorkel (added 27.08.14):
At the title screen, hold Down + Left + B + Select, then pres Start.

(UNI) Invulnerability and start from the Island in the Sky (added 27.08.14):
At the title screen, hold Up + A + B on controller 1 and Up + Right + A + Select on controller 2 at the same time, then pres Start. Note, that if you choose to play with controller 2, you must swap the button codes between controllers too.

Quattro Arcade (Codemasters)

Main menu:

(UNI) Smiley test:
Absolutely all games by Codemasters have internal PRG ROM and CHR RAM testing routines. So called "Smiley tests". Tests are normally enabled, but for triggering it needs pressing all D-Pad buttons. Hold Up + Down + Left + Right + A + Select + Start to enter the PRG ROM test or hold Up + Down + Left + Right + B + Select + Start to enter the CHR RAM test, and press Reset. A green smile means that test passed, red sad face - failed.

C.J's Elephant Antics game:

(UNI) Secret words:
Enter one of following words as a player name for the hi-score screen, to obtain a corresponding effect in the next play.
ZIP-Maximum speed
POW-One-hit weapon
B52-Unlimited bombs
WIZ-Double weapon fire rate
SQC-Another Level
EPX-Another Level
AZS-Another Level
37!-Energy drink, unlimited bombs

F16 Renegade game:

(UNI) Level specific cheats (added 28.08.14):
There are a secret cheats in every first 9 levels except one. You must hold corresponding button from the table below before the level starts, then keep holding it after level is started and wait until the cheat is triggered. A sound and/or paletter flash will confirm cheat triggering. Some levels change its palette upon entering this cheats.
Level|Button|Effect
1|A|Extra life
2|B|Maximum weapons
3|Select|Extra 5 bombs
4|Down|Extra 5000 score
5|Left|Extra life, dark palette
7|Right|Extra life, dark palette
8|Up|Extra life, dark palette
9|Down|Maximum weapons, Extra 5 bombs, pink palette

(UNI) Level warps (added 28.08.14):
At the title screen, hold one of the following button combinations, then press Start. This will work only for 1-Player mode, so make sure when you press Select, the cursor menu is at the "1 PLAYER" position.
A-Level 2
B-Level 3
A + B-Level 4
A + B + Select-Level 5

(UNI) Secret words (added 28.08.14):
Enter one of following words as a player name for the hi-score screen, to obtain a corresponding effect in the next play. Note, that all words should be 7 characters wide, the empty symbols must be filled with spaces, the eight symbol isn't important.
QUATTRO-Extra 9 lives
ARCADE-Maximum weapons
LINUSII-Extra 9 bombs
MIG29-Start from Level 9
WARP17-Start from Level 17

Go! Dizzy Go!:

(UNI) Extra life (added 28.08.14):
At the title screen, hold B and press Start.

(UNI) World 3warp (added 28.08.14):
At the title screen, hold Left + A and press Start.

Quattro Sports, Super Sports Challenge (Codemasters)

(UNI) Smiley test:
Absolutely all games by Codemasters have internal PRG ROM and CHR RAM testing routines. So called "Smiley tests". Tests are normally enabled, but for triggering it needs pressing all D-Pad buttons. Hold Up + Down + Left + Right + A + Select + Start to enter the PRG ROM test or hold Up + Down + Left + Right + B + Select + Start to enter the CHR RAM test, and press Reset. A green smile means that test passed, red sad face - failed.

Quest of Ki, The

(BUR) GameGenie (added 17.01.14):
GENKYZEY-Re-enables a simple debug mode. At the title screen select "NORMAL START" option then hold A + B on controller 1 and press Start to enable the Stage select mode. If you exit this mode just with Start, additionally, at the top-left corner of the screen a block of symbols will be displayed. This is a simple memory viewver and you can adjust the address and watch any RAM values by using controller 2. If you don't need it, before pressing Start in the Stage select screen, hold A on controller 2.

R.B.I. Baseball, Pro Yakyuu - Family Stadium, Atari RBI Baseball (VS)

US version:

(FIX) Credits:
At the title screen, hold A or B or both, then press Start on controller 1.

(BUR) GameGenie (added 12.02.14):
XVXTKGAV-Re-enables the game hold cheat. Any time during the game on controller 2 hold Down and press B to hold the game, press B again to unhold it.
XVUVNGAV-Re-enables the Debug monitor cheat. The set of bumbers will appear at the top-right corner of the screen. Upper four are represents the address, bottom two are data value at the selected address. Any time during the game on controller 2 hold Down and press A to enable address and data edit, change any digit using the D-Pad buttons on controller 2, then press Down + A on controller 2 again to apply edits. You can watch and change any RAM data or watch any ROM data.

Japanese version:

(UNI) Debug monitor (added 12.02.14):
Any time during the game, hold Up + Down on controller 1, then press Right, Left, Down, Up on controller 2. A set of numbers will appear at the top-right corner of the screen. Upper four are represents the address, bottom two are data value at the selected address. Press B on controller 2 to enable address and data edit, change any digit using the D-Pad buttons on controller 2, then press B on controller 2 again to apply edits. You can watch and change any RAM data or watch any ROM data.

(FIX) Credits:
Play exactly 10 games, no matter if you win or lose. It can even be the games played in "WATCH" mode by the computer itself. After the 10th game is over and the game returns to the title screen, a credits screen will appear before the team names demonstration.

(BUR) GameGenie (added 12.02.14):
UGSNZAXY+VTSNLEKV-Replaces the Debug monitor cheat with the game hold cheat. Any time during the game on controller 1 hold B and press Select or Start to hold the game, press Select or Start again to unhold it. This cheat was disabled in the release version.

(BUR) Hidden text (added 05.02.13):
The game contains some generic NAMCO hidden copyright text:
COPYRIGHT 1986 NAMCO LTD.ALL RIGHTS RESERVED


(UNI) Password generator (added 29.11.13):
Your team:
Rival Team:
US Password:


(BUR) GameGenie (added 05.02.13):
GAVYNTEI-There are a series of the Namco games, made by the same programmers Haruhisa Udagawa and Kumi Hanaoka, that contains the same self-test for the data integrity. To enable any of these tests you need a special device that should be plugged into the expansion port. The operation of that device is very simple. It should accept the data bit from the data input port and return it back inverted to the output data port. The device consists of 4-bit shift register, working as some sort of the FIFO buffer. The input bits are goes to the input and then shifted to te output after a 4 cycles. At the game's boot, it tries to send some special data to the device. If the data output doesn't match the data input inverted, then the game continues the normal operation. But if all data (usually 32, rarely 64 bytes) is matches, self-tests will be performed. The program calculates 24-bit partial checksums for the PRG (excluding the last 8K) and the CHR data, summing only every 15th byte, and comparing it against the etalon. Before testing of the PRG data, the background color turns red, before testing of the CHR data, it turns green. If any of these tests are failed, the program will jump directly to the reset routine. It means, one of these tests will be performed infinitely, but until the special device is plugged in, or until the test are passed. Normally, you'll see the red to green flash just before the game's boot. Or the static red screen if the PRG data is bad, or the flashing red to green screen if CHR data isn't good. Using this Game Genie code you can skip tests for the special device presence and jump straight to the integrity tests.

R.B.I. Baseball 2

(GEN) Credits (added 15.06.12):
At the title screen, hold A + B on controller 1 then press Start.
Source: ReyVGM

(UNI) Soft reset (added 29.08.14):
Press A + B + Select + Start.

(UNI) Ingame cheats (added 29.08.14):
During the game, press Start to enter the ingame menu. Press Select to switch to the cheat entry mode. Now enter one of the following cheat codes to get corresponding effect. Note, that both players able to use these cheats in it's turns, but both can use it only three times per game, including failed attempts (with one exception, see below).
Up, Down, Left, Right-Does nothing.
Down + A, Up + Left, Select-Soft reset.
A, Up, Right, Down, Up, Select, Select, Right, Up-Instant homerun for the next hitting. Ball traectory will be the same every time you use this cheat.
B, Down, Left, Down, Left, Down, Left, B-Instant ground hit for the next hitting. Ball traectory will be the same every time you use this cheat.
Start, Up, Down, Left, Up, Down, Right, Up, Up, Up, Up, A-If any of the next pitcher delivery cause either "BALL" or "STRIKE", it will be threated as "STRIKE". This works only once until the first "STRIKE".
Select, Down, Down, Down, Down, Up, Down, Up, Up, Right, Select, Down, Down, Down, Select, Select, Select, Left, Left, Select-Hitting editor. You can set up the direction, traectory and force for the next hitting.
Left, Up, Up, Up, Up, Up, Up, Up, Up, Up, Up, Up, Right, Left, Right, A-Increase number of cheat entry attempts by 2, so you can enter more than 3 cheats per game.
Right, Right, Left, Left, Up, Down, Down, Down, Up, Right, Start-Reload current team data to RAM.

(BUR) GameGenie (added 29.08.14):
XTSVUTAV-Re-enables the simple memory viewer/editor. Press Down + A on controller 2 to enable or disable address and data edit.

R.B.I. Baseball 3

(GEN) Credits (added 15.06.12):
At the title screen, hold A + B on controller 1 then press Start.
Source: ReyVGM

(UNI) Soft reset (added 29.08.14):
Press A + B + Select + Start.

(UNI) Ingame cheats (added 29.08.14):
During the game, press Start to enter the ingame menu. Press Select to switch to the cheat entry mode. Now enter one of the following cheat codes to get corresponding effect. Note, that both players able to use these cheats in it's turns, but both can use it only three times per game, including failed attempts (with one exception, see below).
Up, Down, Left, Right-Does nothing.
Down + A, Up + Left, Select-Soft reset.
A, Up, Right, Down, Up, Select, Select, Right, Up-Instant homerun for the next hitting. Ball traectory will be the same every time you use this cheat.
B, Down, Left, Down, Left, Down, Left, B-Instant ground hit for the next hitting. Ball traectory will be the same every time you use this cheat.
Start, Up, Down, Left, Up, Down, Right, Up, Up, Up, Up, A-If any of the next pitcher delivery cause either "BALL" or "STRIKE", it will be threated as "STRIKE". This works only once until the first "STRIKE".
Select, Down, Down, Down, Down, Up, Down, Up, Up, Right, Select, Down, Down, Down, Select, Select, Select, Left, Left, Select-Hitting editor. You can set up the direction, traectory and force for the next hitting.
Left, Up, Up, Up, Up, Up, Up, Up, Up, Up, Up, Up, Right, Left, Right, A-Increase number of cheat entry attempts by 2, so you can enter more than 3 cheats per game.
Right, Right, Left, Left, Up, Down, Down, Down, Up, Right, Start-Reload current team data to RAM.

R.C. Pro-Am 2

(GEN) Secret words:
Enter one of following words as a player name:
NES-Extra $5000
DMG-Extra continue

Racer Mini Yonku - Japan Cup

(UNI) Race only mode (added 10.01.09):
At the title screen, press A, Up, Left, B, Down, Right, Start. This will skip table game mode and jump directly to the race mode with course select menu.

(UNI) Extra courses (added 10.01.09):
At the title screen, press Left, Down, A, Right, Up, B, Start. The same as previous, but with two extra hidden courses.

Rad Racer 2

(GEN) Continue:
At the title screen, hold A and press Start to resume game play at the last track.

(FIX) Level select (added 15.05.14):
At the title screen, press B one less times than the desired level up to 15, then counter will wrap back to 0. Hold Up + Left and press Start to begin game play. Note: there are only 8 first levels are valid ones, if you press B a nuber of times between 8 and 15, all background palettes will be black, so there is no road can be seen, so called "night mode" in the public sources.

Radia Senki - Reimei Hen

(GEN) Sound test:
At the title screen, hold B, then press Start.

Raid 2020 (Color Dreams)

(UNI) Continue (added 18.01.14):
After the game over screen, additionally to A hold Down, with this button held no continues is consuming, so you can do unlimited amount of continues.

(UNI) Cheat mode (added 18.01.14):
During the game hold Up + A on controller 1 and Up on controller 2 at the same time then press B on controller 1. Hold A and press Select to enable invulnerability, or hold B and press Select to skip to the next level.

Raid on Bungeling Bay

(GEN) Microphone controls (added 18.11.14):
There are 3 game modes in this game. The game mode "2 play" allows to control the enemy's ground turrets from controller 2, the second player can move turrets with D-Pad, fire with A or B with guns and rockets accordingly. There is one more control method actually exist in "2 play" mode. The second player can shout to the microphone on controller 2. Shout once or more and a small gray icon of microphone will appear at the top-middle of the screen. If you shout constantly, the microphone icon will turn pink. If icon is pink, then all flying enemy fighter jets will fly over the screen instantly, no matter where they have been before. So you literally call for reinforcments. This only works if any of enemy jets are in the air already, which is happens after a while during the game. This control method present in NES version too, but can't be used due to lack of microphone on controller 2 of it.

(UNI) Secret message (added 31.01.15):
At the title screen, wait for the demo sequence is started. Press Up + B + Select to return to the title screen with additional secret message added at the bottom of copyright text "BY KIKU"
Source: tcrf.net

Rainbow Islands - The Story of Bubble Bobble 2 (US, Japan)

(UNI) Sound Select:
Press Up, Left, Right, Down, A, B, A, Up when word "START" flashes on the title screen. Press A and B to select a melody, then press Start to play it.

(UNI) World Select:
Press Left, B, Right, Up, Down, Left, Right, B when word "START" flashes on the title screen. Press A and B to select a world, then press Start to play it. This cheat is unlockable at the ending sequence after you beat first 7 worlds.

(UNI) Start with maximum power:
Press Start to pause game play, press Up, Down, Left, Right, A, A, B, B (for the US version) or B, A, A, Up, Down, Down, B, Right (for the Japanese version), then press Start again. A sound will confirm correct code entry. From now on, you will have fast shoes and a double rapid rainbow weapon. This code can only be used one time. After you lose your first life you cannot use it again.

(BUR) Sample version:
The Japanese version contains unreferenced text string "SAMPLE VERSION" at the end of the copyright strins block.
0001DAF0: 1B 18 10 1B 0A 16 16 0E 0D 26 0B 22 26 0D 12 1C ROGRAMMED]BY]DIS
0001DB00: 0C 18 1C 0A 16 19 15 0E 26 1F 0E 1B 1C 12 18 17 COSAMPLE]VERSION
0001DB10: A5 20 29 18 AA A0 00 BD 2A DB 99 E4 07 E8 C8 C0 .W`O..7.a...>...


Rainbow Islands - The Story of Bubble Bobble 2 (Europe)

(UNI) Extra 255 continues (added 01.09.14):
At the title screen, hold Left + A + B + Select and press Start.

(BUR) Hidden text (added 13.11.08):
Most of the games programmed by Ocean shares the same music driver library all along with the hidden version and copyright string:
MUSIC DRIVER V1.0 (C)JONATHAN DUNN & OCEAN SOFTWARE


Rampage

(UNI) Day Select (added 15.11.10):
At the title screen, hold B + Select on controller 1, then press B on controller 2. After selecting the mutant, a new option "SECRET COMMAND SELECT DAY" will appear.

Rampart (Konami)

(BUR) Disabled cheat (added 23.10.07):
At address $96D3 opcode for cheat comparison is present, combination is Up, Up, Down, Down, Left, Right, Left, Right, B, A, standard Konami cheat. Totally disabled, probably used at early development stage, but was removed, cheats does nothing with any variable in game.

Rampart (Jaleco)

(UNI) Soft reset (added 18.01.14):
During the game, press A + B + Select + Start on controller 1 or controller 2 to jump back to the main game menu. Also this will work after powering the console on and skips the intro screens.

(UNI) Cheat options (added 02.09.14):
Pause the game, hold A + B + Select on controller 1, then press particular buttons for a corresponding number of times for a described below effects.
On controller 1 Down 5 times-Press Start to hold the game without hiding the screen, press Start one more time to enter the normal Pause screen.
On controller 2 Select 1 time-During 1-Player game, when you sank the ship, the water will change its color to red until next game phase. During 2-Player mode the water in the river will be purple instead of dark blue and it will flow in reverse direction.
On controller 2 Select 2 times or more-During 1-Player game, when you sank the ship, the water will change its color to green until next game phase. During 2-Player mode the water in the river will be light blue instead of dark blue and it will flow in reverse direction.
On controller 2 Select 5 times-Enter the Pause screen and return back to the game, this will complete curren map instantly if you at the Selecting castle phase. If you at the Cannon and Build and repair phases, you must complete them sucessfully in order to apply this cheat.
On controller 2 Select 5 times or more-Enter the Pause screen, press Select on any controller and exit back to the game to instantly complete current game phase. Note, that this cheat doesn't allows you to complete the current phase succesfully, it's just drops countdown timer to zero. This can be combined with the cheat above to speedup the proccess.
On controller 2 Select 10 times or more-This cheat does exactly the same as for 5 pressings cheat, but now you need to press Up on any controller at the Pause screen to enable it.
On controller 2 Select 13 times-Next game will start from the last battle.
On controller 2 Select 20 times or more-In 2-Player game, at the guilotine screen a different execution animation bill be enabled.

(BUR) GameGenie (added 02.09.14):
LEVXZLZA-Re-enables the third menu option at the main game menu with STUFF placeholder.

Rasaaru Ishii no Childs Quest

(UNI) Cheat options (added 18.01.14):
Select the continue option, when asked for name, enter "ゆうゆo". Then at the password entry screen, skip first 4 password letters and from the 5th position enter "たいみそ", now hold Up on controller 2 and press one of the following buttons to get corresponding effect:
A on controller 2-Easter egg
B on controller 2-Ending sequence
Start on controller 1-Start a new game with maximum health and money.

Remote Control

(GEN) Easter Egg:
At the character selection screen, press Select to change the name of the character. Name the first character "PLEASE", press Select then Right to switch to next character, name the second character "SHOW" and the third character "RSP" and press Start. There will be digitized pictures of the game developers Mike Riedel, Remington Emin and Eric Shefferman. If you press A or B or both, each of them will change it's face.

Ren & Stimpy Show, The

(UNI) Secret message (added 13.04.10):
At the game copyrights screen, before the title screen appears, press quickly Up 1 time, Right 1 time, Down 9 times, Left 6 times in any order, just press every button given number of times. To exit to the normal game press Up.

(UNI) Secret items (added 08.04.15):
Start a new game. At the very first screen of the first level, collect the coil, the socks and the pie items. Throw out 4 coils, 3 socks and 2 pies, so in your possession should left exactly 1 coil, 2 socks and 3 pies. Now go to the very left corner of the screen and fire while walking. If done right, a two secret items with names Jay Bacal and Tony Lau will fall down on the table. The first one gives to you 99 lives, the second one gives to you an unlimited health.

Road Fighter

(BUR) Hidden text (added 05.09.14):
There are hidden version and build date strings at the start of the ROM of the Japanese version:
RC801 1.0 850328
And at the end of the ROM of the European version:
MSTR910502


RoadBlasters

(BUR) Hidden text (added 18.01.14):
There is a copyright text at the end of the ROM for the US version:
Nintendo RoadBlasters by Mark Morris 4:51 pm, Friday, June 16, 1989
For the European version:
Nintendo RoadBlasters by Mark Morris 3:09 pm, Thursday, 31 May 1990


Robin Hood - Prince of Thieves

(UNI) Extra 4 lives (added 17.03.11):
At the title screen, press A, A, B, A, B. A sound will confirm correct code entry.

(UNI) Extra 6 lives (added 17.03.11):
At the title screen, press A, A, A, A, B, B, B, A. A sound will confirm correct code entry.

(GEN) Secret passwords:
At the title screen, press A, A, A, A, A, A, A, A, B, B, B, B, B, B, B, B. The following passwords may now be used to start at the corresponding game location.
CATACOMB-Outside Arab jail
WALL-Hadrian's Wall
LOCKSLEY-Locksley Castle
DUBOIS-Dubois Manor
CHASE-Horse race to Sherwood
CATHEDRA-Rescue the maiden
BOAR-Battle the boar
MASTER-Search for Master Trainer
CHAPEL-Meet Marian at chapel
WELL-Search for haunted well
TAX-Attack gold wagons
POND-Search for healing water
VILLAGE-Defense of Sherwood Village
CELTS-Battle Celts
TOWN-Journey to town
TOWNHANG-In town, by gallows
CASTLEIN-Inside Sheriff's castle
WEDDING-End

(UNI) Debug mode (added 17.03.11):
At the title screen, press A, A, A, A, A, A, A, A, B, A, A, A, A, A, A, A, B, A, A, A, A, A, A, B, A, A, A, A, A, B, B, B. A sound will confirm correct code entry. Pause the game to toggle the debug mode on or off. While in the debug mode, press Start to open the debug menu where you can select any locations or jump directly to the fight with bosses. Your HP will be always 100, and periodicly your status will be cleaned and restored automatically, also you can walk through the walls and doors without keys.

(UNI) Version message (added 09.09.14):
Hold Up + A + B + Select + Start on controller 1, then press Reset. Hold until the version number appears.

(UNI) Credits (added 09.09.14):
During the game, enter the game menu by pressing Start, then put cursor to the "EXIT" option and press A + Start. A secret credits window will appears.

(BUR) Hidden text (added 17.03.11):
There are a hidden version strings in every version of this game at the beginning of the ROM:
ROBIN HOOD FRN PAL FEB 11/92
for the PAL version,
ROBIN HOOD GER PAL FEB 11/92
for the German region version,
ROBIN HOOD SPN PAL SEP 11/92
for the Spain region version,
ROBIN HOOD VERSION AUG 07/91
for the NTSC PRG0 version,
ROBIN HOOD VERSION OCT 31/91
for the NTSC PRG1 version.

Robocop

(GEN) Unlimited continue:
At the game over screen, hold A + B + Select and press Start.

Robocop 2

(UNI) Level select (added 31.03.12):
At the title screen, hold Up + Right on controller 1 and Down + Left on controller 2 at the same time. Now by pressing B on controller 1 cycle through levels 0 to 14. Press A to reset level index back to 0. A sound will confirm code triggering after each A or B pressing. Select the "CONTINUE" option to start from the selected level.

(BUR) Hidden text (added 13.11.08):
Most of the games programmed by Ocean shares the same music driver library all along with the hidden version and copyright string:
MUSIC DRIVER V1.0 (C)JONATHAN DUNN & OCEAN SOFTWARE
Additionally, at the end of BANK 6 some placeholder text exists:
hello this is a bit of text


Robodemons (Clor Dreams)

(UNI) Continue (added 18.01.14):
After the game over screen, additionally to A hold Down, with this button held no continues is consuming, so you can do unlimited amount of continues.

(UNI) Cheat mode (added 18.01.14):
During the game hold Up + A on controller 1 and Up on controller 2 at the same time then press B on controller 1. Hold A and press Select to enable invulnerability, or hold B and press Select to skip to the next level.

Rocket Ranger

(FIX) Credits and full rocket lab:
Begin game play and enter "War Room". Retrieve all your agents from the missions and transfer all them to Lutonia. Then, at the "War Room" screen hold Start and press Select. The credits screen and the message about unlocking full rocket lab will be displayed. Proceed to the Rocket Lab to play Chapter 2 on the Moon base.

Rocketeer, The

(UNI) Secret passwords (added 10.09.14):
Enter any of this passwords at the Password screen, then start a new game.
169-963-491-During the game press Select + Start to skip current level. Hold A, then press Select + Start to restore health, fuel and ammo for all weapons.
000-000-047-Enables the Cutscene Debug mode. Every frame of animation or message at the cutscenes now will wait for the A button press or hold to continue.

Rocman X (Sachen)

(UNI) Level select (added 18.01.14):
At the title screen, press Up + A + B + Select on controller 1, then press Down + B.

Rod Land

(UNI) Secret names:
Enter first fairy name as "ICH" and second fairy as "EAT", now press Select through the game to access level select menu.

(BUR) Vulgarity check:
If you enter as a name one of the following words, your fairy will be with ashamed red face: "SHT", "FUK", "BUM", "TIT", "SEX", "VAJ", "CNT", "POO", "NOB", "DIK".

(BUR) Hidden text (added 11.09.14):
The RESET routine in this game uses string
QUAGMIRE
to check if the game was hard or soft reset.

(BUR) GameGenie (added 11.09.14):
AANANVGS+XLNEEVUK-Re-enables the Credits screen after every cutscene. Just wait when the text is over to print out and the programm will wait some time for any key, press any key or just wait and it will jump every to the disabled credits. The same screen can be seen in the European version at the starting logo if you press Right. Less known, that you can press Right after every cutscene screen to see the Credits screen again, since a key waiting routine is the same for cutscenes and starting logo.

Roger Clemens MVP Baseball

(UNI) Credits:
At the title screen, press A, A, B, B, Up, Down, Select.

Rokudenashi Blues

(BUR) GameGenie (added 18.01.14):
AENNONNY-Various debugging functions.
Hold Start on controller 1, then press Reset to perform power-on memory re-init.
Hold Up on controller 2, then press Reset to see the Ending Credits sequence.
At the title menu, hold Up on controller 1 and press A or B on controller 2 to enable or disable chapter selection menu after starting a new game.
During the game, press B on controller 2 to open debug menu with a lot of options.
During the game, hold B on controller 1 to enable free walk mode.
There are more options may be enabled in various places if set RAM var $00FD to values 1 to 4, but there is no more code to change it ingame.

Rollerblade Racer

(UNI) Cheat menu (added 19.01.14):
During the game, press Start to pause it. Hold Select then press B, A, A, A, a sound will confirm correct code entry. Now press Down or Up to select between options "PAUSED", "SKIP WORLD", "STOP CLOCK" and "RESTART". Press Start to enable selected option.

Rolling Thunder

(UNI) Extra 5 continues:
At the title menu, hold Up + A on controller 2 and Up + B on controller 1 at the same time, then press Start on controller 1.

Romancia

(GEN) Secret ending image:
After the ending credits, when the portrait of you and Celina with the word "FIN" appears, press A 10 times and a closeup image of both characters will be shown.
Source: ReyVGM

(GEN) Sound test:
At the "PRESENTED BY..." screen, hold Up + A + B + Select and wait until the title screen appears.
Source: ReyVGM

Route-16 Turbo

(UNI) Credits:
At the title screen, press Up, Up, Up, Left, Left, Left, Down, Down, Down, Right, Right, Right, B, B, B, Start.

Rush'n Attack

(FIX) Music glitch:
Hold Start or Select then press Reset. Release it after the title screen appears. From now all demo sequences will have music along with the sounds.

Scarabeus (Prototype)

(GEN) Secret passwords:
IGORSAYSWARP-The level skip, by press Select during the game.

SD Battle Oozumou - Heisei Hero Basho

(UNI) Easy mode (added 01.01.09):
At the title menu, press Up, Left, Down, Right, B, A, A, B. From now in battle you won't be affected by any side effects if HP less than 9.

SD Gundam - Gachapon Senshi 3 - Eiyuu Senki

(BUR) GameGenie (added 18.09.14):
GGSYUNPU+EYSYKYXN-Hold one of the following buttons and press Reset to enable different debug functions.
A-CHR test
B-OBJ test
Up-Huge cannon blast animation test
Down-Satellite fall animation test

SD Gundam - Gachapon Senshi 4 - NewType Story

(BUR) GameGenie (added 23.01.09):
KIXYUYXV+EPXNOYPV+NYXNXNST-Hold one of the following buttons and press Reset to enable different debug functions.
A-CHR test
B-OBJ test
Up-Huge cannon blast animation test
Down-Different animation test, removed completely from release version.

SD Gundam Gaiden - Knight Gundam Monogatari

(BUR) GameGenie (added 19.01.14):
AESNNNNY-During the game on controller 2, press A to start a battle any time, press A during battle to finish it instantly. Hold B and press Up or Down to enable or disable random encounters. On controller 1, hold Select to free walk through the walls and obstacles.

SD Gundam Gaiden - Knight Gundam Monogatari 2 - Hikari no Kishi

(BUR) GameGenie (added 19.01.14):
AENNONNY-On controller 1, any time during game, hold Select and press Start to see the ending sequence. Hold B to free walk throug the walls and obstacles. In the game menu, point cursor to the last option ("CARDS"), hold Right and press A to see the complete cards set. Some other options should be enabled by selecting the $00FE variable, but there is no more code to change it.

SD Gundam Gaiden - Knight Gundam Monogatari 3 - Densetsu no Kishi Dan

(BUR) GameGenie (added 19.01.14):
AENNONNY-During the game, hold B on controller 1 to free walk through walls and obstacles. Press B on controller 2 to enable the complex debug menu, where you can change a lot of game parameters.

SD Hero Soukessen - Taose! Aku no Gundan

(FIX) Easy mode:
At the title screen, hold Down + A and press Start.
Source: ReyVGM

(FIX) Hard mode:
At the title screen, hold Up + B and press Start.
Source: ReyVGM

(FIX) Hero select:
During the game, press Start to pause and press Up, Right, Down, Left, B, B, A, A. The game will be unpaused automatically and you can change your current hero by pressing Select. Note, that only correct pressings are counts, if you press wrong button in this sequence, nothing won't happen. So you can enter it just by mashing all the buttons for a short time, just make sure you press them all a couple of times.

SD Keiji - Blader

(UNI) Selftests and easters (added 10.12.10):
Hold one of two combinations of buttons on controller 2 from the table below, press Reset, and then release all buttons. In both cases the programm will perform the PRG and CHR data checksum tests and display it's results. A messages "プログラム  オーケー" will appear after a while if PRG is ok, and "キャラクター オーケー" if CHR test is ok, in other case you will see the message "エラー" instead of "オーケー". Following effects are depending on which button combination you pressed before resetting the console and described below.
Up + Down + Left + Right-After the tests, the program will wait for A on controller 1 press, then perform additinal SRAM test. If SRAM isn't initialized, the message "エラー" will be displayed and SRAM will be reinitialized. In other case message "オーケー" will be displayed and game continues.
Up + A + B-There are two options available here. While the program performing the tests, quickly hold one of the additional button combinations on controller 2 to get the corresponding effects:
Right + A + B-Ending credits will be displayed.
Left + A + B-Maxed out level and other parameters at the start of the new game.

(BUR) Hidden text (added 10.12.10):
The pseudo-random generator data in this game starts with string
Programed by YOU
and ends with another unused text string
SD Sgt. BLADER


Saint Saiya - Tian Ma Huan Xiang (Nanjing)

(UNI) Secret message (added 21.05.14):
During the game, while in conversation mode, hold Up + Select + Start on controller 1 and skip with A to the end of the dialog. The copyrigh string will be displayed in the dialog box. This cheat can be found in a couple of Nanjing games on the same engine.

Saint Seiya - Ougon Densetsu Kanketsu Hen

(BUR) GameGenie (added 19.01.14):
PESNVYAA-Re-enables some debug features. During game on controller 2 press A to skip current level or boss battle, during regular levels press Up or Down to max out cosmo and life accordingly. In the prototype version this feature is enabled by default.

Saiyuuki World

(UNI) Cheat mode:
At the title screen, press Up, Down, Up, Down, A. You will obtain extra 99 lightning bolts, powerful shield, high jump and unlimited money. Plus you will be able to skip current level by pressing Up + A + B on controller 1.

Saiyuuki World 2 - Tenjoukai no Majin, Whomp'Em

(GEN) Sound test:
At the title screen, hold A + B on controller 2 then press Start on controller 1, continue holding A + B until sound test mode appears.

(UNI) Ending sequence (added 15.09.14):
Enter the Sound test as described above. Press Down + A + B on controller 1 and controller 2 at the same time.

(UNI) Random stage (added 15.09.14):
At the stage select screen, press A on controller 1 to run random stage selection mode. Press A on any controller or Start on controller 1 to stop selection and play with selected stage.

(UNI) Extra items (added 15.09.14):
At the stage select screen, highlight desired level to play, hold one of the following buttons on controller 2 and press A or Start on controller 1 to obtain corresponding items at the beginning of the stage.
Right-Extra 2 ferruls (increase player's punch power, each glove used for 4 punches)
Left-Extra helmet item (decrease player's damage)
Down-Extra 2 ferruls and helmet at the same time.

(UNI) Extra 3 lamps (added 16.09.14):
During the game, at any level except the first one, press Select then press Up + Down + Left + Right at the same time using combination of the D-Pad buttons on both controllers. For example press Up + Left on controller 1 and Down + Right on controller 2 at the same time. This code works only once per level.

(UNI) Final boss fight:
Pause the game by pressing Select. Оn controller 2 press A, B, Up, Down, Up, Down, A, B, Left, Right, Left, Right, A, B, A, B, A, A, A, A. You will hear the short sound. Press Select again and enter the same cheat code one more time. A confirmation sound will be different. Complete current location and you'll be moved directly to the final boss with full set of weapons.

(BUR) GameGenie:
PENUNYAA-This code turns the player into a bunch of hexadecimal debug values:
The upper left and right numbers are unknown. They change when an enemy appears on screen.
The upper middle number increases or decreases by 1 every time the screen scrolls 16 pixels horizontally or vertically.
The lower left number is unknown. It occasionally flips between 0 and 1 as you move through an area.
The lower middle and right numbers are the frame counter. This increases by 1 each frame.
Note, while the code is present and functional in both versions, the graphics for characters A-F were overwritten in the Japanese version.
Source: BMF54123

Sakigake!! Otoko Juku - Shippuu Ichi Gou Sei

(BUR) GameGenie (added 19.01.14):
AENYENNY-Re-enables some debug options. Press B on controller 2 to skip current level. Press Up on controller 2 to make strange jump back or up if you already at the corner of the screen. Press Select during the game to enter ingame menu. Hold Left, then press A on controller 2 to switch the invincibility on or off again.

San Guo Zhi - CaoCao Zhuan (Nanjing, NJ018)

(UNI) Secret message (added 21.05.14):
During the game, while in conversation mode, hold Up + Select + Start on controller 1 and skip with A to the end of the dialog. The copyrigh string will be displayed in the dialog box, but the proper graphics or text was removed from this version of the game. This cheat can be found in a couple of Nanjing games on the same engine.

(UNI) Extra money and exp (added 17.09.14):
During the game, exit from the town to the world map, press Select to open the map screen, which isn't show anything on the world map. Hold Up + A + Select + Start for a while until you exit back to the world map. Now you'll have an extra 2048 gold and 256 exp.

San Guo Zhi - Qun Xiong Zheng Ba (Asder)

(UNI) Secret moves (added 20.01.14):
At the "ASDER" logo screen, hold for a while Up + Left + A + B + Select on controller 1. During the game, press one of the following combinations to perform a secret moves, which varies between fighters, but mostly involving a fire.
Select-Wall of fire
A + Select-Fireball
B + Select-Fire jump

(BUR) Hidden text (added 20.01.14):
At the end of the ROM, some copyright text is present:
PATRICK.
and
ASDER.SOFT


Sangokushi - Chuugen no Hasha

(BUR) GameGenie (added 05.02.13):
GENNOAEI-Some of the Namco games, which uses the 19 mapper PCB, contains also the specific self-test routine. It can test and initialize the internal RAM buffers. Similar to the other Namco games series, in order to run these tests, you must plug in a special device to the famicom expansion port. This device is much simpler than mentioned another device. It just takes one bit of data and immediately returns it inverted to the data port, there is no FIFOs inside. When the program detects the device presence, it performs RAM test and initialization. If RAM is already tested/initialized, the screen will turn blue. If RAM isn't initialized, but after init and test all is fine, then screen will turn yellow or pink. If, even after the reinitialization, RAM test fails, then screen will turn red. After the tests, program goes to the infinite loop, so yo must unplug special device to boot into the game. Using this Game Genie code you can skip the special device check and just directly to the RAM initialization routine. This game tests it's WRAM.

Sangokushi II - Haou no Tairiku

(GEN) Sound test (added 09.01.14):
At the title screen, at the player selection menu, on controller 1 hold A then press Up, Down, Left, Right. This and all following cheats can be entered very easy, because there is no fails check at all, only correct pressings are counts while you holding corresponding buttons. So you can just mash all D-Pad buttons before the cheat is triggered.

(UNI) Ending sequence (added 09.01.14):
At the title screen, at the player selection menu, on controller 1 hold B then press Left, Right, Right, Left, Down, Up, Up, Down.

(UNI) Max stats for player 1 (added 09.01.14):
Start a new single or two player game. At the leader selection screen, when message "PLAYER 1 SELECT YOUR LEADER" is displaying (don't press A or B), on controller 1 hold Select + Start, then press Up, Down, Up, Down, Left, Right, Left, Right. For all following cheats effect is saved to the SRAM and stay permanent after powering off the console.

(UNI) Max stats for player 2 (added 09.01.14):
Start a new two player game. At the leader selection screen, when message "PLAYER 2 SELECT YOUR LEADER" is displaying (don't press A or B on controller 2), on controller 1 hold Select + Start, then press Up, Left, Down, Right, Left, Up, Right, Down.

(UNI) Unknown (added 09.01.14):
At the leader selection screen, (doesn't matter if you've pressed A / B or not), on controller 1 hold Select, then press Right, Right, Down, Down, Up, Down, Up, Down.

(UNI) Unknown (added 09.01.14):
At the leader selection screen, (doesn't matter if you've pressed A / B or not), on controller 1 hold Start, then press Up, Right, Down, Left, Up, Left, Down, Right.

(UNI) Autoplay mode (added 09.01.14):
At the leader selection screen, press A then select your leader. Now, on controller 1 hold Start then press A to start a new game. All players will be controlled by computer, you can just watch.

(UNI) Warp to the last move (added 09.01.14):
During player turn, enter the map mode by press Select, then hold Up + Start on controller 1 and press Select again. This will left you only one move to play till the end of your turn.

(BUR) GameGenie (added 05.02.13):
NNNNOYAE-Re-enables the watch mode switch. Using this code you can switch between auto and manual play modes any time during computer controlled player move. Just hold A + Start and press Select on controller 1.
GEVNILEI-Some of the Namco games, which uses the 19 mapper PCB, contains also the specific self-test routine. It can test and initialize the internal RAM buffers. Similar to the other Namco games series, in order to run these tests, you must plug in a special device to the famicom expansion port. This device is much simpler than mentioned another device. It just takes one bit of data and immediately returns it inverted to the data port, there is no FIFOs inside. When the program detects the device presence, it performs RAM test and initialization. If RAM is already tested/initialized, the screen will turn blue. If RAM isn't initialized, but after init and test all is fine, then screen will turn yellow or pink. If, even after the reinitialization, RAM test fails, then screen will turn red. After the tests, program goes to the infinite loop, so yo must unplug special device to boot into the game. Using this Game Genie code you can skip the special device check and just directly to the RAM initialization routine. This game tests it's WRAM.

Sanma no Mei Tantei

(BUR) Hidden text (added 23.06.09):
Game contain some generic NAMCO hidden copyright text:
COPYRIGHT 1986 NAMCO LTD.ALL RIGHTS RESERVEDMR TAKASI FUKAWA
Also at end of file there is some other text:
HARUHISA.UDAGAWA &  KUMI.HANAOKA
This text is a part of hidden CRC test routine and used in some other games programmed by the same people, in this game it used as one of the test data.

(BUR) GameGenie (added 23.06.09):
GANYNTEI-There are a series of the Namco games, made by the same programmers Haruhisa Udagawa and Kumi Hanaoka, that contains the same self-test for the data integrity. To enable any of these tests you need a special device that should be plugged into the expansion port. The operation of that device is very simple. It should accept the data bit from the data input port and return it back inverted to the output data port. The device consists of 4-bit shift register, working as some sort of the FIFO buffer. The input bits are goes to the input and then shifted to te output after a 4 cycles. At the game's boot, it tries to send some special data to the device. If the data output doesn't match the data input inverted, then the game continues the normal operation. But if all data (usually 32, rarely 64 bytes) is matches, self-tests will be performed. The program calculates 24-bit partial checksums for the PRG (excluding the last 8K) and the CHR data, summing only every 15th byte, and comparing it against the etalon. Before testing of the PRG data, the background color turns red, before testing of the CHR data, it turns green. If any of these tests are failed, the program will jump directly to the reset routine. It means, one of these tests will be performed infinitely, but until the special device is plugged in, or until the test are passed. Normally, you'll see the red to green flash just before the game's boot. Or the static red screen if the PRG data is bad, or the flashing red to green screen if CHR data isn't good. Using this Game Genie code you can skip tests for the special device presence an