Mostly Unpublished Cheats ;)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.

  150-in-1 [p1][!]
  100 Man $ Kid - Maboroshi no Teiou Hen, Casino Kid (U)
  16 Mahjong, Tai Wan Ma Que 16
  1943 - The Battle of Midway, 1943
  1945, Sky Shark
  3-D Battles of World Runner, The
  4 Nin Uchi Mahjong
  8 Eyes
  AV - Mahjongg
  AV Jiu Ji Ma Jiang 2
  AV Poker, Mari - Ayami - Luka no AV Poker, Peek-A-Boo Poker, Poker (As)
  AV Pretty Girl Fighting
  AV Soccer, Ultimate League Soccer
  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 (U)
  Addams Family, The - Pugsley's Scavenger Hunt
  Advanced Dungeons & Dragons - Dragon Strike
  Adventures in the Magic Kingdom
  Adventures of Bayou Billy, The, Mad City
  Adventures of Dino Riki, The, Shin Jinrui - The New Type
  Adventures of Lolo (J), Adventures of Lolo 2 (U)
  Adventures of Lolo (U)
  Adventures of Lolo 2 (J), Adventures of Lolo 3 (U)
  Adventures of Rocky and Bullwinkle and Friends, The
  Adventures of Tom Sawyer, Tom Sawyer no Bouken
  After Burner, After Burner II
  Air Fortress
  Airwolf (J)
  Akumajou Densetsu, Castlevania III - Dracula's Curse
  Akumajou Special - Boku Dracula-kun
  Aladdin (E) [!]
  Aladdin (E) [p1], Aladdin (Unl)
  Alien 3
  Alien Syndrome
  All Night Nippon Super Mario Bros., Super Mario Bros. (JU), VS Super Mario Bros.
  Alpha Mission, ASO - Armored Scrum Object
  Ankoku Shinwa - Yamato Takeru Densetsu
  Antarctic Adventure
  Arabian Dream Sherazaado, Magic of Scheherazade, The
  Argos no Senshi, Rygar
  Argus
  Arkanoid (J)
  Arkanoid 2
  Asterix
  Astro Fang - Super Machine
  Astyanax, Lord of King, The
  Atari RBI Baseball, Pro Yakyuu - Family Stadium (J), Pro Yakyuu - Family Stadium '87, R.B.I. Baseball (U)
  Atlantis no Nazo
  Attack of the Killer Tomatoes
  B-Wings
  Babel no Tou
  Back to the Future (U)
  Back to the Future II & III
  Bad Dudes (U), Bad Dudes vs Dragon Ninja, Dragon Ninja
  Bad News Baseball, Gekitou Stadium!!
  Bakushou! Star Monomane Shitennou
  Banana Prince, Bananan Ouji no Daibouken
  Barbie
  Baseball Simulator 1.000, Choujin - Ultra Baseball
  Baseball Star - Mezase Sankanou!!, Baseball Stars (U)
  Bases Loaded 4, Moe Pro! - Saikyou Hen
  Batman - Return of the Joker, Dynamite Batman
  Batman Returns, Batman 3
  Batsu & Terii
  Battle Baseball
  Battle City, Tank 1990
  Battle Formula, Super Spy Hunter
  Battle Stadium - Senbatsu Pro Yakyuu
  Battle Storm
  Battleship
  Battletoads & Double Dragon - The Ultimate Team
  Battletoads (U)
  Beauty and the Beast
  Bee 52
  Beetlejuice
  Best Play Pro Yakyuu '90
  Best Play Pro Yakyuu (J)
  Best Play Pro Yakyuu II
  Best Play Pro Yakyuu Special
  Best of the Best - Championship Karate
  Big Nose Freaks Out
  Big Nose the Caveman
  Bikkuri Nekketsu Shin Kiroku! - Harukanaru Kin Medal, Crash 'n the Boys - Street Challenge
  Binary Land
  Bio Miracle Bokutte Upa
  Black Bass 2, The, Black Bass USA, The
  Black Bass, The
  Blaster Master, Chou-Wakusei Senki - MetaFight
  Blue Marlin, The
  Blue Shadow, Kage, Shadow of the Ninja
  Blues Brothers, The
  Bo Jackson Baseball
  Bomber King, Robo Warrior
  Bomberman II, Dynablaster
  Bonk's Adventure, FC Genjin - Freakthoropus Computerus
  Booby Kids
  Boogerman
  Bram Stoker's Dracula
  Bubble Bath Babes, Mermaids of Atlantis, Soap Panic
  Bubble Bobble 2
  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
  Capcom Barcelona '92, Gold Medal Challenge '92
  Captain America and The Avengers
  Captain Ed
  Captain Saver, Power Blade 2
  Captain Skyhawk
  Captain Tsubasa (J), Tecmo Cup - Soccer Game
  Captain Tsubasa Vol. II - Super Striker
  Castelian, Kyoro Chan Land
  Castle Quest
  Castle of Dragon, Dragon Unit
  Castlevania II - Simon's Quest
  Cat Ninden Teyandee
  Joe & Mac - Caveman Ninja
  Challenger
  Championship Bowling
  Championship Pool
  Chaos World
  Chessmaster, The
  Chester Field - Ankoku Shin heno Chousen
  Chiki Chiki Machine Mou Race, Wacky Races
  Chiller
  Chitei Senkuu Vazorudaa, Wurm
  Chou Hen, Galactic Crusader, Papillion
  Choujin Sentai - Jetman
  Chu Da D
  Chuugoku Senseijutsu
  City Adventure Touch - Mystery of Triangle
  Clash at Demonhead, Dengeki - Big Bang!
  Clu Clu Land
  Commando, Senjou no Ookami
  Conquest of the Crystal Palace, Matendouji
  Contra (U), Gryzor, Probotector (E)
  Contra Force
  Cool World
  Cosmic Epsilon
  Crackout
  Crisis Force
  Cross Fire
  Crystalis, God Slayer - Haruka Tenkuu no Sonata
  Dai Meiro - Meikyuu no Tatsujin
  Dai-2-Ji - Super Robot Taisen
  Daikaijuu Deburas
  Daiku no Gen San 2 - Akage no Dan no Gyakushuu
  Dalton McGuinty's Kids' Computer Game, M.C. Kids
  Darkman
  Dash Galaxy in the Alien Asylum
  Datsugoku, POW - Prisoners of War
  Deadly Towers, Mashou
  Defender II, Star Gate
  Demon Sword, Fudou Myouou Den
  Destination Earthstar
  Destiny of an Emperor, San Guo Zhi - Ying Jie Zhan, Sangokushi - Eiketsu Den, Tenchi wo Kurau (J)
  Dig Dug II
  Digital Devil Monogatari - Megami Tensei II
  Dirty Harry
  Dizzy The Adventurer
  Doki! Doki! Yuuenchi, Trolls in Crazyland, The
  Don Doko Don (J)
  Don Doko Don 2
  Donald Land
  Donkey Kong Country 4
  Doraemon (J)
  Double Dragon 4, Target Renegade
  Double Dragon II - The Revenge
  Double Dragon III - The Rosetta Stone, Double Dragon III - The Sacred Stones
  Downtown - Nekketsu Koushin Kyoku - Soreyuke Daiundoukai
  Dr. Mario
  Dragon Buster
  Dragon Fighter
  Dragon Quest (J), Dragon Warrior (U)
  Dragon Quest III, Dragon Quest VI, Dragon Warrior III, Yong Zhe Dou E Long - Dragon Quest VI
  Dragon Quest IV, Dragon Warrior IV, Yong Zhe Dou E Long - Dragon Quest IV, Yong Zhe Dou E Long - Dragon Quest VII
  Dragon Spirit - Aratanaru Densetsu, Dragon Spirit - The New Legend
  Dragon's Lair
  Dragon, The
  Drop Zone
  Dungeon & Magic - Swords of Element
  Dynowarz - Destruction of Spondylus
  Earth Worm Jim 2 (Shin-Shin)
  Earth Worm Jim 2 (Super Game)
  Earth Worm Jim 3
  Egypt
  Elite
  Esper Dream 2 - Aratanaru Tatakai
  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
  Famicom Meijin Sen
  Family Boxing, Ring King
  Family Circuit '91
  Family Circuit (J)
  Family Computer - Othello, Othello (U)
  Family Jockey
  Family Pinball, Rock 'n' Ball
  Family Quiz
  Famista '89 - Kaimaku Han!!
  Famista '90
  Famista '91
  Famista '92
  Famista '93
  Famista '94
  Fantastic Adventures of Dizzy, The
  Fantasy Zone (J)
  Fantasy Zone (Tengen)
  Faria - A World of Mystery and Danger!, Faria (J)
  Felix the Cat by Dragon Co
  Fighting Golf, Lee Trevino's Fighting Golf
  Fighting Road
  Final Fantasy (J), Yin He Shi Dai
  Final Fight 3
  Fire 'n Ice, Solomon no Kagi 2 - Coolmin Tou Kyuushutsu Sakusen, Solomon's Key 2
  Fire Emblem (J)
  Fire Emblem Gaiden
  Fire Hawk
  Flintstones, The - The Rescue of Dino & Hoppy
  Flintstones, The - The Surprise at Dinosaur Peak!
  Flipull - An Exciting Cube Game
  Flying Warriors, Hiryuu no Ken III - 5 Nin no Ryuu Senshi
  Four Players Tennis, Top Players' Tennis - Featuring Chris Evert & Ivan Lendl, World Super Tennis
  Freedom Force
  Fuzzical Fighter
  G.I. Joe (U)
  Galaxian
  Galaxy 5000
  Gambler Jiko Chuushin Ha - Mahjong Game
  Gambler Jiko Chuushin Ha 2
  Ganbare Goemon! - Karakuri Douchuu
  Ganbare Pennant Race!
  Ganso Saiyuuki - Super Monkey Daibouken
  Garfield - A Week of Garfield
  Gauntlet (U)
  Gekitou Pro Wrestling!! - Toukon Densetsu, Tecmo World Wrestling
  Getsufuu Maden
  Ghosts'n Goblins, Makai-Mura
  Ghoul School
  Gimmick!, Mr. Gimmick
  Goal! 2, Goal! Two, Goal!!
  Godzilla - Monster of Monsters!, Godzilla (J)
  Golgo 13 - Dai 1 Shou - Kamigami no Tasogare, Golgo 13 - Top Secret Episode
  Golgo 13 - The Riddle of Icarus, Mafat Conspiracy - Golgo 13
  Goonies II, The - Fratelli Saigo no Chousen, Goonies II, The (U)
  Gradius (J)
  Gradius II
  Grand Master
  Great Battle Cyber
  Great Tank, Iron Tank
  Greg Norman's Golf Power
  Guerilla War, Guevara
  Guardian Legend, The, Guardic Gaiden
  Gun Nac
  Gun Sight, Laser Invasion
  Gun-Dec, Vice - Project Doom
  Gun.Smoke
  Gyruss
  Hacker, The
  Heavy Barrel
  Heavy Shreddin'
  Hector 87, Starship Hector
  Hi no Tori - Houou Hen - Gaou no Bouken
  Hit the Ice
  Hokuto no Ken (J)
  Hokuto no Ken 2 - Seikimatsu Kyuuseishu Densetsu, Fist of the North Star
  Home Alone (U)
  Home Run Nighter '90 - The Pennant League
  Honoo no Doukyuuji - Dodge Danpei (J)
  Hook
  Hoshi o Miru Hito
  Hototogisu
  Huang Di
  Hudson Hawk
  Hudson's Adventure Island (U), Takahashi Meijin no Bouken Shima (J)
  Hudson's Adventure Island II, Takahashi Meijin no Bouken Shima II
  Hudson's Adventure Island III, Takahashi Meijin no Bouken Shima III
  Hunt for Red October, The
  Hydlide (U), Hydlide Special
  Hydlide 3 - Yami Kara no Houmonsha
  Hyper Olympic, Track & Field (U), Track & Field in Barcelona
  Hyper Sports
  Ikari (J), Ikari Warriors
  Ikari II - Dogosoken, Ikari Warriors II - Victory Road
  Ikari III - The Rescue, Ikari III (J)
  Image Fight
  Immortal, The
  Incredible Crash Dummies, The
  Indiana Jones and the Last Crusade (E), Indiana Jones and the Last Crusade (U) (UBI Soft)
  Indiana Jones and the Last Crusade (U) (Taito)
  Infiltrator
  Insector X
  International Cricket
  Ironsword - Wizards & Warriors II
  Isolated Warrior, Max Warrior - Wakusei Kaigenrei
  Itadaki Street - Watashi no Mise ni Yottette
  Ivan Ironman Stewart's Super Off-Road, Super Off-Road
  Jackie Chan (J), Jackie Chan's Action Kung Fu
  James Bond Jr
  Jarinko Chie - Bakudan Musume no Shiawase Sagashi
  Jesus - Kyoufu no Bio Monster
  Jetsons, The - Cogswell's Caper!
  Jigoku Gokuraku Maru, Kabuki - Quantum Fighter
  Jimmy Connor's Tennis
  Journey to Silius, Raf World
  Joust
  Jovial Race
  JuJu Densetsu, Toki
  Jungle Book, The
  Jurassic Park
  Juuryoku Soukou Metal Storm, Metal Storm
  Kage no Densetsu, Legend of Kage, The
  Kagerou Densetsu
  Kaiketsu Yanchamaru (J), Kid Niki - Radical Ninja
  Kaiketsu Yanchamaru 2 - Karakuri Land
  Kame no Ongaeshi - Urashima Densetsu, Xexyz
  Karate Champ
  Karnov
  Kero Kero Keroppi no Daibouken (J)
  Kick Master
  Kickle Cubicle, Meikyuu Shima
  Kid Klown, Mickey Mouse 3 - Yume Fuusen
  King Kong 2 - Ikari no Megaton Punch
  King of Fighters 96
  King of Kings (J)
  Kinnikuman - Muscle Tag Match, M.U.S.C.L.E.
  Klash Ball
  Knight Rider
  Koushien
  Krazy Kreatures
  Krion Conquest, The, Magical Doropie
  Kujaku Ou 2
  Kung-Fu Heroes, Super Chinese (J)
  Kunio Kun no Nekketsu Soccer League
  Kyonshiizu 2
  Kyuukyoku Harikiri Koushien
  Kyuukyoku Harikiri Stadium 3
  Kyuukyoku Tiger, Twin Cobra
  Lagrange Point
  Last Ninja, The
  Legend of Prince Valiant, The
  Legend of the Ghost Lion, White Lion Densetsu
  Legend of Zelda, The, Zelda no Densetsu 1 - The Hyrule Fantasy
  Lethal Weapon
  Lethal Weapon (Tw)
  Lifeforce, Salamander
  Linus Spacehead's Cosmic Crusade
  Lion King III, The - Simon and Pumba
  Lion King, The (E)
  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
  Lost Word of Jenny
  Low G Man
  Lunar Ball
  Lupin Sansei - Pandora no Isan
  Mad Max
  Magic Candle, The
  Magic Darts
  Magic John (J), Totally Rad
  Magic Johnson's Fast Break
  Magician
  Majaventure - Mahjong Senki
  Major League Baseball
  Majou Densetsu 2 - Daimashikyou Galious
  Maniac Mansion (J)
  Mappy Kids
  Mappy-Land
  Master Fighter 2, Street Fighter II (YOKO)
  Mega Man 2, Rockman 2 - Dr. Wily no Nazo
  Mega Man 3, Rockman 3 - Dr. Wily no Saigo!
  Mega Man 5, Rockman 5 - Blues no Wana!
  Mega Man 6, Mega Man 7, Rockman 6 - Shijou Saidai no Tatakai!!, Rockman 7
  Meiji Ishin
  Meimon! Takonishi Ouendan - Kouha 6 Nin Shuu
  Meitantei Holmes - Kiri no London Satsujin Jiken
  Menace Beach
  Mendel Palace, Quinty
  Metal Fighter
  Metal Max
  Metroid
  Mezase Pachi Pro - Pachio Kun
  MiG 29 - Soviet Fighter
  Mickey Mania, China Rabbit Baby
  Mickey Mouse (J), Mickey Mousecapade
  Micro Machines
  Mike Tyson's Punch-Out!!, Punch-Out!!
  Minelvaton Saga
  Mirai Shinwa Jarvas
  Mission Impossible
  Mitsume ga Tooru
  Mobile Suit Z Gundam - Hot Scramble
  Momotarou Densetsu (J)
  Momotarou Dentetsu
  Monster In My Pocket
  Moon Crystal
  Mortal Kombat 3 - Special 56 Peoples
  Mouryou Senki Madara
  Ms. Pac-Man (U) (Namco)
  Ms. Pac-Man (U) (Tengen)
  Musashi no Bouken
  Musashi no Ken - Tadaima Shugyou Chuu
  Mutant Virus, The
  NARC
  Nagagutsu wo Haita Neko - Sekai Isshuu 80 Nichi Daibouken
  Nangoku Shirei!! - Spy Vs Spy
  Nantettatte!! Baseball
  Napoleon Senki
  Navy Blue
  Nekketsu Kakutou Densetsu
  Nekketsu Koukou Dodgeball Bu - Soccer Hen, Nintendo World Cup
  New Ghostbusters II
  New York Nyankies, Rockin' Kats
  Ninja Cop Saizou, Wrath of the Black Manta
  Ninja Gaiden (U), Ninja Ryukenden (J), 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 Kun - Ashura no Shou
  Nobunaga no Yabou - Sengoku Gunyuu Den, Nobunaga's Ambition 2
  North & South
  Nuts & Milk
  Operation Wolf
  Orb 3D
  Over Horizon
  P'radikus Conflict, The
  Pac-Land
  Pac-Man
  Pachi Com
  Palamedes (U)
  Palamedes 2 - Star Twinkles
  Panda Prince
  Panda World
  Panic Restaurant, Wanpaku Kokkun no Gourmet World
  Paperboy (U)
  Parallel World
  Parasol Stars - The Story of Bubble Bobble 3
  Paris-Dakar Rally Special
  Parodius (E), Parodius da!
  Perfect Fit
  Pictionary
  Platoon
  Pocahontas (As)
  Pocahontas 2
  Power Blade (U), Power Blazer
  Power Punch 2
  Power Rangers 3
  Power Rangers 4
  Predator
  President no Sentaku
  Prince of Persia
  Pro Sport Hockey, USA Ice Hockey in FC
  Pro Yakyuu - Family Stadium '88
  Probotector II - Return of the Evil Forces, Super C, Super Contra (J)
  Punisher, The
  Pyokotan no Dai Meiro
  Quarter Back Scramble
  Quattro Adventure
  Quattro Arcade
  Quattro Sports, Super Sports Challenge
  R.C. Pro-Am 2
  Racer Mini Yonku - Japan Cup
  Rad Racer 2
  Raid on Bungeling Bay
  Rainbow Islands - The Story of Bubble Bobble 2
  Rampart (J)
  Robin Hood - Prince of Thieves
  Robocop (U)
  Robocop 2
  Rocket Ranger
  Rod Land
  Roger Clemens MVP Baseball
  Rollergames
  Rolling Thunder
  Route-16 Turbo
  Rush'n Attack
  SD Battle Oozumou - Heisei Hero Basho
  SD Gundam - Gachapon Senshi 4 - NewType Story, Di 4 Ci - Ji Qi Ren Dai Zhan
  SD Hero Soukessen - Taose! Aku no Gundan
  Saiyuuki World (J)
  Saiyuuki World 2 - Tenjoukai no Majin, Whomp'Em
  Sanma no Mei Tantei
  Satomi Hakkenden
  Section Z
  Seicross
  Seikima II - Akuma no Gyakushuu
  Shatterhand, Tokkyuu Shirei - Solbrain
  Shin Samurai Spirits 2 - Haoumaru Jigoku Hen
  Shinobi
  Side Pocket
  Silva Saga
  Silver Eagle (Sachen)
  Silver Surfer
  Simpsons, The - Bart Vs. the Space Mutants
  Skate or Die 2 - The Search for Double Trouble
  Sky Destroyer
  Sky Kid, Super Sky Kid
  Smash T.V.
  Solomon no Kagi (J), Solomon's Key (U)
  Solstice
  Somari, Sonic 3D Blast 5, Sonic 3D Blast 6
  Space Harrier
  Space Hunter
  Spelunker
  Splatter House - Wanpaku Graffiti
  Spot
  Spy Hunter
  Sqoon
  Square no Tom Sawyer
  Stack Up (Robot Block)
  Star Force
  Star Luster
  Star Soldier
  Star Trek - The Next Generation
  Star Wars - The Empire Strikes Back
  Sted - Iseki Wakusei no Yabou
  Strider
  Stunt Kids
  Summer Carnival '92 - Recca
  Sunman
  Super Chinese 3
  Super Contra 3
  Super Contra 7
  Super Donkey Kong 2
  Super Donkey Kong [p1]
  Super Mario World
  Super Pang
  Super Pang 2
  Super Pinball
  Super Robin Hood
  Super Shinobi
  Super Turrican
  Super Xevious - Gump no Nazo
  Sword Master
  T& C 2 - Thrilla's Surfari
  Tag Team Pro-Wrestling, Tag Team Wrestling, Special Tag Team Pro-Wrestling
  Taito Chase H.Q.
  Taiyou no Shinden - Asteka 2, Tombs and Treasure
  Takahashi Meijin no Bouken Shima IV
  Takeshi no Chousenjou
  Tatakai no Banka, Trojan
  Tecmo Bowl
  Tecmo Super Bowl
  Tecmo World Cup Soccer
  Teenage Mutant Hero Turtles II - The Arcade Game (E), Teenage Mutant Ninja Turtles (J), Teenage Mutant Ninja Turtles II - The Arcade Game (U)
  Teenage Mutant Ninja Turtles - Tournament Fighters
  Teenage Mutant Ninja Turtles II - The Arcade Game (J), Teenage Mutant Ninja Turtles III - The Manhattan Project (U)
  Tekken 2
  Terminator 2 - Judgment Day
  Tetrastar - The Fighter
  Tetris (Unl)
  Tetris 2 (U), Tetris Flash
  Tetsuwan Atom
  Thexder
  Thunderbirds
  Thundercade
  Tiger-Heli
  Time Diver Eon Man
  Tiny Toon Adventures (U)
  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
  Tokoro San no Mamoru mo Semeru mo
  Tom & Jerry and Tuffy
  Top Gun - Dual Fighters, Top Gun - The Second Mission
  Top Rider
  Toukon Club
  Toy Story
  Tower of Druaga, The
  Toxic Crusaders
  Treasure Master
  Tsuri Kichi Sanpei - Blue Marlin Hen
  TwinBee 3 - Poko Poko Dai Maou
  Uchuu Keibitai SDF
  Ultimate Stuntman
  Untouchables, The
  Vegas Connection - Casino Kara Ai wo Komete
  Vegas Dream, Viva! Las Vegas
  Volguard II
  Wagyan Land (J)
  Wait and See!
  Wario no Mori, Wario's Woods
  Wayne Gretzky Hockey
  Where in Time is Carmen Sandiego
  Where's Waldo
  Who Framed Roger Rabbit
  Willow
  World Boxing
  Wrecking Crew
  Xevious
  Xiao Au Jiang Wu
  Xiao Ma Li
  Yie Ar Kung-Fu
  Yo! Noid, Kamen no Ninja - Hanamaru
  Yoshi no Cookie, Yoshi's Cookie
  Youkai Douchuuki
  Youkai Kurabu
  Yume Penguin Monogatari
  Zanac
  Zelda II - The Adventure of Link
  Zen Intergalactic Ninja
  Zoids Mokushiroku
  Zombie Hunter
  Zunou Senkan Galg

Cheats summary:
generic cheats-232
unique cheats-420
buried secrets-293
fixed generic cheats-103
unverified games-921
games with secrets-616
games with no secrets found-92

150-in-1 [p1][!]

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

100 Man $ Kid - Maboroshi no Teiou Hen, Casino Kid (U)

US version:

(UNI) Secret passwords:
Instead "_" symbol you should use "FORWARD" option at 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 button before pressing A button 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.
i_wanna_go_bankrupt-Takes you to "game over" screen (strange cheat).
debug_monitor_switch_on-Debugging functions.
In addition to A + Start on first controller hold Left + A on second controller before skipping splash screen.
To switch to in game debugging monitor hold Left + A on second controller then press Start on first controller,
"MONITOR VERSION 1.00 PRESENT BY HIRO" screen appears. You will be able to view game events, play music and sounds.

Japan version:

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

16 Mahjong, Tai Wan Ma Que 16

(UNI) Secret message:
There is one more copyright message secretly encoded inside ROM. To view it press at title screen Up, A, Left, B, Down, B, Right, A, B, B, A. Message: 
         COPYRIGHT 1988
THIN CHEN ENTERPRIZE CORPORATION
    BY: LI-CHEANG TCHACVOSKY
appears. It appears that message was some kind of copyright protection. Encoded message is invisible in ROM and cannot be modified by pirates.

1943 - The Battle of Midway, 1943

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

1945, Sky Shark

(BUR) Hidden text:
This game using for padding some info about developers. 
SKY SHARK    COPYRIGHT TAITO AMERICA CORP
     PROGRAMMER   STEPHEN RUDDY 1988
         ARTIST   ANDREW THRELFALL
       MUSICIAN   TIM FOLLIN
  SOFTWARE CREATIONS LTD
FIRST FLOOR    204 OXFORD ROAD
MANCHESTER    M1 5QA
GREAT BRITAIN
TEL 061 236 1154
FAX 061 236 8248
   JELLYFISH BEANS AND CUSTARD

3-D Battles of World Runner, The

(GEN) Continue:
After your game has ended, push Up + A or push Down + A.

(GEN) Hard mode:
Press B, B, B, B then hold Up + Left and press Start to begin game play.

4 Nin Uchi Mahjong

(BUR) Hidden text:
There is hidden copyright message at 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.

8 Eyes

US version:

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

(UNI) Password generator:
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:

Japan version:

(UNI) Password generator:
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:

AV - Mahjongg

(UNI) Replay mode:
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 Jiu Ji Ma Jiang 2

(UNI) Replay mode:
At title screen after "START" message appears press Up, Up, Left, Left, Down, Down, Right, Right.

(UNI) Extra 900 game points:
At 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 Poker, Mari - Ayami - Luka no AV Poker, Peek-A-Boo Poker, Poker (As)

(GEN) Ending sequence:
Press Select, Start, A, Up, B, Down at the title screen. The first ending screen will appear after a brief pause. Press A, A, Up, B, Down to cycle through the screens.

AV Pretty Girl Fighting

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

AV Soccer, Ultimate League Soccer

(UNI) Ending sequence:
Press Select, B, Up, A, Down, B, Left, A, Right at the title screen, after pressing start, before team setup appears.

Aa Yakyuu Jinsei Icchokusen

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

Abadox

(UNI) Super weapon:
Press Up, Down, Right, Right, Up, Left, Right, Down, Left, Up, Start after the "PRESS START" message appears. During game play, press Start, Start to get a super weapon.

(GEN) Invulnerability and Super weapon:
On the title screen press A, A, Up, B, B, Down, A, B and start and you're invulnerable. To get super weapons, press Start, Start during game play.

(GEN) Stage select:
On the credits screen, press Left, Up, Right, Down, Up, Right, Left, Down and then press the following buttons:
Up-Stage 2
Left-Stage 3
Down-Stage 4
Right-Stage 5
Select-Stage 6
B-Stage 7

(GEN) Ending sequence:
Press A, A, Up, B, B, Down, A, B, B, Start at when the phrase "PRESS START" appears.

Abarenbou Tengu, Zombie Nation

(GEN) Sound test:
Hold Up + A + B and press Reset.

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

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

(UNI) Special Round Select:
Power on console then press Reset 25 times, at title screen now press Up, Up, Down, Down, Left, Right, Left, Right then press Start.

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

(BUR) Hidden text:
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 crossrefrences 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

Japan version:

(UNI) Level select and more:
At title screen hold A + B on second controller and then press on first controller:
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 title screen hold A + B on second controller and then press on first controller:
A + Start-Level 2
B + Start-Level 3
Right + Start-Level 4

(UNI) Extra 12 lives:
At title screen hold Up + A + B on second controller and then press Start on first controller.

European version:

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

Addams Family, The (U)

(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:
There is a hidden copyright text in ROM: "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:
There is a hidden copyright text in ROM: "MUSIC DRIVER V1.0 (C)JONATHAN DUNN & OCEAN SOFTWARE".

US version:

(BUR) GameGenie:
GAULAVGK-Enables hidden copyright screens at game start. This credits was enabled in prototype version.

Advanced Dungeons & Dragons - Dragon Strike

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

(UNI) Japan version:
At 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.

Adventures in the Magic Kingdom

(BUR) Unused music:
Melodies 1 an 9 are unused in game. Second one seems to me another version of title screen music.

(BUR) Unused messages and sprites:
There is a lot of unused messages and sprites inside game ROM. First of all debug message by programmer: "ADVENTURE IN MAGIC KINGDOM BY BAMBOO!!! TENTIWOKURAU WO YORUSIKU!!! SATURDAY'S MORNING IS MORNING SALSD", "HELLO!", etc... Another ones messages belong to unused characters at message box, that should appear when you complete some levels. Sprites are present too and can be accessed.

Adventures of Bayou Billy, The, Mad City

English versions:

(BUR) Hidden text:
There is a hiden version data inside ROM: "SAMP881226FOR-KONAMI.INC".

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

(FIX) Continue:
At the game over screen hold any direction button then press Start.

Adventures of Lolo (J), Adventures of Lolo 2 (U)

(UNI) Password generator:
Level:
Password:

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

Adventures of Lolo (U)

(UNI) Password generator:
Level:
Password:

Adventures of Lolo 2 (J), Adventures of Lolo 3 (U)

Japan 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

(GEN) Level skip:
Press B, A, A, Start, A, B, B, A on second controller as soon as game play begins. Then press B on second controller during game play to jump to the next level. Your character can not jump after this code has been enabled.

Adventures of Tom Sawyer, Tom Sawyer no Bouken

(BUR) GameGenie:
This cheat combination was disabled in final release, but probably was planned to be enabled. There is should be combination Up, Down, Down, Right, Left, Right, Right, Left, Up, Down, Down, Right, but on development stage was shorted to first two buttons. Because some key press check, pressed buttons not wait too long, key check code looks kinda fixed, so it need more fixes to work properly, but rapid pressing of buttons is work fine for me.
IANXLOIZ (Japan version)
IEOXAPLL (US version)		-Enable Cheat Menu cheat.
To enter to the Cheat Menu press rapidly Up then Down.

After Burner, After Burner II

US version:

(FIX) Sound test:
Hold B button before title screen appears (at console power up or after game over screen).

(GEN) Reverse mode:
Hold A + B on second controller and press Start on first controller..

(GEN) Continue:
When your game is over and you're at the blue After Burner screen, press Left, Left, Left, B, B, B, A, A, A, Start. You will continue on the level you just got a game over on.

(UNI) Unknown:
Press Left, Left, Left, B, B, B, A, A, A, A, A, A, A, B, Up, Up, Down, Down, Down, Down, Down in title screen. You'll hear a sound.

Japan version:

(UNI) Sound test:
At the title screen hold A then start the game.

(UNI) Reverse mode:
Hold A + B on second controller and start the game.

(UNI) Continue:
When your game is over and you're at the blue After Burner screen, press A, A, A, A, B, Up, Up, Down, Down, Down, Down, Down, Down. You will continue on the level you just got a game over on.

(UNI) Unknown:
At the title screen press B, B, B, B, B, B, B, A, A, A, A, A, A, A, Up, Up, Up, Up, Up, Up, Up. You'll hear the sound. First part of this cheat cause unlimited continue, the same as After Burner.

Air Fortress

Japan versions:

(GEN) Second quest:
Enter as password words "GYUW", "AGOG", and "OOON" in sequence. Press Start after entering each word, nothing will seems happening.

Airwolf (J)

(GEN) Invulnerability:
Start a new game. Hold A on second controller when the helicopter drop-off point appears, then press Up, Left, Down, Right, Down, Left, Up, Right on first controller. The Airwolf will flash to confirm correct code entry.

(GEN) Stage select:
Press Up, Down, Left, Right, A, B, A, B on second controller, then press A + Start on first controller at the title screen.

(GEN) Music test:
Press Up, Down, Left, Right, A, B, A, B on second controller, then press A + B + Start on first controller at the title screen.

Akumajou Densetsu, Castlevania III - Dracula's Curse

(FIX) Sound test:
At 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

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

Aladdin (E) [!]

(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 (E) [p1], Aladdin (Unl)

(BUR) GameGenie:
PAOEILAA-Enable Alternate game title "Popey - Travels in Persia"

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:
There is a hidden copyright message in ROM: "ALIEN3...NINTENDO ENTERTAINMENTSYSTEM.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 crossrefs to this string in ROM anymore.

Alien Syndrome

(GEN) Level select:
Press Down + Start on first controller and Right on second controller simultaneously.

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

All Night Nippon Super Mario Bros., Super Mario Bros. (JU), VS Super Mario Bros.

(GEN) Continue:
After game over hold A button on the title screen then press Start to start from previously played world, but not sub world.

Alpha Mission, ASO - Armored Scrum Object

All versions:

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

English versions:

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

Ankoku Shinwa - Yamato Takeru Densetsu

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

Antarctic Adventure

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

Arabian Dream Sherazaado, Magic of Scheherazade, The

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

Argos no Senshi, Rygar

Japan version:

(BUR) Password mode:
There is only text for additional menu item left. There is no passwords in 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:
At title screen hold Select on second controller then press Start on first controller.

Arkanoid (J)

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

(FIX) Skip Level:
Any time you want, during the game press and hold A + Start to advance to another level.

Arkanoid 2

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

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

(BUR) Hidden text:
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.

Asterix

(UNI) Cheat menu:
Start the game and 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 title screen with extra "cheat" menu item.

(UNI) Invulnerability:
Do the same operations as for cheat menu enabling, but before pressing Start to return to main menu, hold Up + Right + A + B buttons. Start new game with any cheats as you wish and press Start to pause game again. Then enter the same code as for enabling cheat menu. 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

(BUR) Hidden text:
There is some hidden copyright text in ROM: "GAME SOUND (C) COPYRIGHT 1990-03-20 SOFT MACHINE INC Nakakuma Akira".

Astyanax, Lord of King, The

(GEN) Stage select:
Press Up, Down, Left, Right, B, B, B, B, Start at the title screen.

(GEN) Invulnerability:
Press Up, Up, Up, Up, Down, Left, Right, Up, Start at the title screen.

(GEN) Demo select:
Press Up, Up, Up, Down, Down, Down, A, B, Start at the title screen.

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

(GEN) Continue:
Press A, B, Select, Start at the game over screen.

Atari RBI Baseball, Pro Yakyuu - Family Stadium (J), Pro Yakyuu - Family Stadium '87, R.B.I. Baseball (U)

(GEN) Credits:
At title screen hold A + B then press Start.

Atlantis no Nazo

(BUR) GameGenie:
GAXAPPAX-With this GG three of disabled cheat codes can be used.
Skip current zone: at title screen press on second controller Select 33 times, A 22 times then press buttons A and B on any controller simultaneously. Note: any time you press A or Select on second controller, internal counter is increasing, so you may press combination of A on first controller and B on second controller or A + B on first controller to perform last condition. Then press Start on first controller to start new game.
Infinite lives: at title screen press on second controler A 11 times, on first controller B 22 times. Then press Start on first controller to start new game.
Invulnerability: at title screen press on first controller B 33 times, then press buttons A, B, Select, Up, Down on any controller simultaneously. Note: any time you press B on first controller, internal counter is increasing, so you may press B for combination on second controller and other buttons on first controller. You cannot also press Up and Down on the same controller at the same time, so press them on separate controllers. Then press Start on first controller to start new game.

Attack of the Killer Tomatoes

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

(UNI) Secret message:
After you left last live 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:
Before triggering one of cheats you should enable cheat mode. On first controller hold Up then press A, then release Up. Repeat this for Right, Down, Left buttons accordingly, each time holding it, pressing A, then releasing. After this, hold one of 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 anyweapon.
Left-Enable stage select and weapon select at the same time.

Babel no Tou

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

(BUR) Hidden text:
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.

Back to the Future (U)

(GEN) Disable music:
Pause game play, hold Up + A + B + Select, then resume game play.

(BUR) Hidden text:
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):
Hold B at the title screen then press Select to display the password menu. Enter "FLUXCAPACITORISTHEPOWER" as a password.

Bad Dudes (U), Bad Dudes vs Dragon Ninja, Dragon Ninja

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

(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 second controller, then press Start on first controller. Your punch power two times increased.

(UNI) Patriotic cheat:
After beating game, when last credit's message "data east usa corp." rolls out, American flag at White House stops flutter. Then press Right, Left, Down, Up, A, A, B on second controller to make it flatter again. Press any button to stop it for the last time and A or Start to return to main menu.

Bad News Baseball, Gekitou Stadium!!

(GEN) Play as Girls team:
Hold Down + Left on first controller and Up on second controller, then press Reset. A heart will appear to confirm correct code entry.

Bakushou! Star Monomane Shitennou

(UNI) Unknown:
Any time in game press Up + Left + A + B on first controller. Seems this cause permanent luck for any player.

Banana Prince, Bananan Ouji no Daibouken

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

(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:
Hold Select on first controller then press Reset, continue holding Select at initial copyright screen and press A, B, Up, Down, Left, Right, A, B on the same first controller. Upper copyright strings will change to "CHRISTINE, ROBERT, SCOTT, VICTOR, JEFFERY WESTEFELD" strings. Release all button and press A + B on first controller to return all normal copyrights back.

Baseball Simulator 1.000, Choujin - Ultra Baseball

(BUR) GameGenie:
UUXYPOEU (Japan version)
EKXYTOSL (US version)		-Enable simple memory viewer/patcher. Probably should be called from another routine in game.
GGOVIYAE (Japan version)
SGXTLNSU (US version)		-Switch game to debug mode. Just reset the console. Probably should be called from anoter routine before reset.

Baseball Star - Mezase Sankanou!!, Baseball Stars (U)

US version:

(GEN) Super men's team:
Select the "Make Team" option from the main menu. Then press Down, Right, Left, Down, Down, Right, Up. The "Balanced Team" should now be selected, press A to enter team name edit screen and your team name will change to "WHEN ISNT IT?". Change the team name to "WHEN IT IS.".

(GEN) Super women's team:
Select the "Make Team" option from the main menu. Then press Down, Right, Left, Down, Down, Right, Up, Up, Down, Up, Down, Up. The "Veterans" team should now be selected, press A to enter team name edit screen and your team name will change to "WHAT IS A WREN?". Change the team name to "A BIRD.". The name will change again to "WHEN ISNT IT?". Change the name to "WHEN IT IS.".

Bases Loaded 4, Moe Pro! - Saikyou Hen

(GEN) Music test:
When on the title screen, press Start to go to the "Play" menu, here press and hold A + B on second controller and the press Start on first controller to get to a sound test screen. Use first controller to select music and second controller to select sound effects.

Batman - Return of the Joker, Dynamite Batman

(GEN) Sound test:
Hold A + Start at the title screen.

Batman Returns, Batman 3

(UNI) Repeat ending sequence:
After ending sequence over and copyright message appears, press on second controller Left + A + B.

Batsu & Terii

(UNI) Level select:
At the title screen press Up, Down, Left, Right, Up, Down, Left, Right on second controller then select desired level (only worlds 1, 2, 5, 6 are available) by pressing B button on the second controller 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 second controller 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 second controller 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 second controller 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 second controller 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 second controller then start the game.

Battle Baseball

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

Battle City, Tank 1990

Console version:

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

(BUR) GameGenie:
IIOKYXAZ-Enable ingame 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 0x10 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.
Info from Griever

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

(BUR) Hidden text:
At 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:
Insert credit then hold A + B on second controller and press Start on first controller. You must choose desired level in 10 seconds.

Battle Formula, Super Spy Hunter

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

(GEN) Extra lives:
Hold A + B + Select and press Start at the title screens. Various numbers will appear on the screen. The number that remains on the screen indicates the number of lives available during the game. Note: Up to twelve lives may be selected in this manner.

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

Battle Stadium - Senbatsu Pro Yakyuu

(UNI) Debug mode:
Press Up, Up, Down, Down, Right, Left, Right, Left, A, B, Start on "oyasumi" page.

Battle Storm

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

Battleship

(UNI) Secret passwords:
0914-Unlimited weapons
0528-Shows enemy grid by pressing Select

Battletoads & Double Dragon - The Ultimate Team

(FIX) Extra lives:
Hold Up + A + B and press Start at the player selection screen. Note: This code may also be re-activated at the game continue screen.

(UNI) Warp zone Extra 5 Lives:
Press B, A, Down, B, Up, Down on the player select screen. A sound will confirm correct code entry. Now 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. Game play will begin with ten lives after a level is selected.

Battletoads (U)

(GEN) Six lives:
Hold Down + A + B and press Start at the title screen or continue screen. An explosion will confirm correct code entry.

Beauty and the Beast

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

Bee 52

(GEN) Junior:
Press Right, A, B, A, B, Start on any splash screen before entering level. Message "cheat!" will appears.

(BUR) GameGenie:
Absolutely all games by Codemasters have internal PRG ROM and CHR RAM testing routines. They called "Smiley tests". Tests are normally enabled, but for triggering it needs pressing all D-pad buttons. For performing PRG ROM test it needs to hold Up + Down + Left + Right + A + Select + Start. For performing CHR RAM test it needs to hold Up + Down + Left + Right + B + Select + Start. Without controller modification it is impossible. GameGenie codes allows you to do not use D-pad buttons for triggering cheat, only A + Select + Start and B + Select + Start. But it affects on ROM's CRC. I ran these tests normally by cheating with debugger, so I wrote normal CRC tests results in brackets.
EUXUUSNL-PRG CRC test (test ok)
ANUUNSYY-CHR RAM test

Beetlejuice

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

Best Play Pro Yakyuu '90

(UNI) Debug menu:
Choose first option at main game menu ("league data") then select 2nd team name and edit it to そのべ (press A at team name, then move cursor Up and again press A), return by pressing B button to main menu and choose middle upper menu item, move cursor down 13 times to point blue bar next to last position. Then return to main menu again and press Start at 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 (J)

(UNI) Debug menu:
Choose first option at main game menu ("league data") then select 2nd team name and edit it to そのべ (press A at team name, then move cursor Up and again press A), edit name as usual and return to main menu, press Select, Right, Left and menu will appear. You can listen game music and view ending and other sequences.

Best Play Pro Yakyuu II

(UNI) Debug menu:
Choose first option at main game menu ("league data") then select 2nd team name and edit it to そのべ (press A at team name, then move cursor Up and again press A), now select 5th team name and change its name to すだぴん. Return to main menu, point cursor to middle upper menu item and press Start. 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 main game menu ("league data"), select any league then select 2nd team name and edit it to そのべ (press A at team name, then move cursor Up and again press A), return by pressing B button to main menu and choose middle upper menu item, move cursor down 12 times to point blue bar next to last position. Then return to main menu again and press Select at currently selected menu option. You'll be able to hear the music, view some winning sequences and edit custom sounds with sound editor.

Best of the Best - Championship Karate

(UNI) Secret words:
Enter one of wollowing 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".

Big Nose Freaks Out

(BUR) GameGenie:
Absolutely all games by Codemasters have internal PRG ROM and CHR RAM testing routines. They called "Smiley tests". Tests are normally enabled, but for triggering it needs pressing all D-pad buttons. For performing PRG ROM test it needs to hold Up + Down + Left + Right + A + Select + Start. For performing CHR RAM test it needs to hold Up + Down + Left + Right + B + Select + Start.Without controller modification it is impossible. GameGenie codes allows you to do not use D-pad buttons for triggering cheat, only A + Select + Start and B + Select + Start. But it affects on ROM's CRC. I ran these tests normally by cheating with debugger, so I wrote normal CRC tests results in brackets.
EUNUVUNL-PRG CRC test (test ok)
AYOLXKYY-CHR RAM test

Big Nose the Caveman

(BUR) GameGenie:
Absolutely all games by Codemasters have internal PRG ROM and CHR RAM testing routines. They called "Smiley tests". Tests are normally enabled, but for triggering it needs pressing all D-pad buttons. For performing PRG ROM test it needs to hold Up + Down + Left + Right + A + Select + Start. For performing CHR RAM test it needs to hold Up + Down + Left + Right + B + Select + Start. Without controller modification it is impossible. GameGenie codes allows you to do not use D-pad buttons for triggering cheat, only A + Select + Start and B + Select + Start. But it affects on ROM's CRC. I ran these tests normally by cheating with debugger, so I wrote normal CRC tests results in brackets.
EUSZLKNL-PRG CRC test (test ok)
ANVZYKYY-CHR RAM test

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

(BUR) Hidden text:
There is some hidden text list present. String index only initialized by 0 at 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

Binary Land

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

(GEN) Love story:
Hold on both first and second controllers 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 (菊田政昭). He put secret codes with messages almost in all his games under HUDSON label.

Bio Miracle Bokutte Upa

(BUR) No Damage:
RAM variable 0x1C set to 1 instead 0, then message "NO DAMAGE" appears at stage number screen. No other noticeable differences.

Black Bass 2, The, Black Bass USA, The

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

Black Bass, The

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

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

Blaster Master, Chou-Wakusei Senki - MetaFight

US version:

(BUR) GameGenie:
XTVYGGAV-There were Stage select mode at development stage. Japan version contain it full functional, but 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 second controller) not working. Buttons A and B on second controller increases weapon power and stuff.

Japan version:

(BUR) GameGenie:
EKNYUYAA-Enable debug features. You can select any level after starting new game. While in game, press Up on second controller to move to any level coordinates, there was level editor or something else as well at developement stage with extra RAM at 0x7000-0x7FFF area. Buttons A and B on second controller increases weapon power and stuff.

Prototype version:

(BUR) GameGenie:
GAXKPKGK-Enable debug features. While in game, level edit mode (Up on second controller) not working. Buttons A and B on second controller increases weapon power and stuff.

Blue Marlin, The

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

(BUR) Hidden text:
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. Enter one of the following codes, then press Start on first controller. To start with invulnerability, hold Down on second controller in addition to the other buttons.
B on second controller-Level 1-2
A on second controller-Level 1-3
A + B on second controller-Level 1-4
B on first controller-Level 2-1
B on first controller, B on second controller-Level 2-2
B on first controller, A on second controller-Level 2-3
B on first controller, A + B on second controller-Level 3-1
A on first controller-Level 3-2
A on first controller, B on second controller-Level 3-3
A on first controller, A on second controller-Level 4-1
A on first controller, A + B on second controller-Level 4-2
A + B on first controller-Level 4-3
A + B on first controller, B on second controller-Level 5-1
A + B on first controller, A on second controller-Level 5-2
A + B on controllers one and two-Sound Test

Blues Brothers, The

(UNI) Level skip:
Any time in the game press on the second controller Down + Right + A + B + Select + Start and the same time press Up + Right + A + B + Select + Start on the first controller. 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. Message "Not bad but. You aint't seen nothin' yet!"

Bo Jackson Baseball

(GEN) All-Bo Jackson team:
Select any team, then press Left + B + Select at the team roster screen. Bo Jackson will appear in every position on the roster. Note: Bo's batting average is .399 and ERA is 1.53.

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

Bomber King, Robo Warrior

(BUR) Theme song:
0x53!=0x0, 0x2F8!=0 => new title menu option, that plays theme song along with lyrics (!). 0x2F8 variable disabled to write in US version and there is no CHR tiles, this mode enabled only in Japanese version. Anyway, code for this mode have both versions. Don't know exactly how to enable it normally. Pobably this option enables after game beating.

Bomberman II, Dynablaster

All versions:

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

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

US version:

(FIX) Secret passwords:
K3456712-Sound Test
K138BHDJ-Manual detonator
K1HB3G1H-Semi manual detonator
KJH5C13D-Bonus stage
K2JG2135-Small primer time
K2JG2G1H-Normal primer time
K2JG2JF4-Long primer time

Japan version:

(FIX) Secret passwords:
PCDEFGAB-Sound Test
PACHINKO-Manual detonator
PANICMAN-Semi manual detonator
PONEJACK-Bonus stage
PBOMBACE-Small primer time
PBOMBMAN-Normal primer time
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 title screen. Switch between Level select and Sound test by pressing Select.

Booby Kids

(BUR) Password option:
There is some text left from early development stage. "ENTER PASSWORD" should be written on other nametable and probably switchable with 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:
RESET routine in this game uses string "ERIKO" to check if game was soft or hard reset.

Boogerman

(UNI) Debug feature:
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.
Info from Яковлев Виктор

Bram Stoker's Dracula

(BUR) GameGenie:
TOXEYNGT-Enable title screen cheat for enabling advanced menu features.
After applying GG press Select, Up, Start, Right, Left on 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 buttons 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 buttons and press Start, you will hear confirmation sound. Then just select "start game" option to play from selected level.

Bubble Bath Babes, Mermaids of Atlantis, Soap Panic

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

Bubble Bobble 2

(GEN) Level select:
Press at title screen Left, B, Right, Up, Down, Left, Right, B.

Bucky O'Hare

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

(GEN) Secret passwords:
HARD!-Hard mode

(BUR) Copyrights check:
As most games by Konami made after 1991 year game contains some copy protection scheme, it checks for string "IMANOK 1991" presence in ROM, and for routine opcodes for this check itself. If checking fails, then game enables "HARD" mode with one-touch-death.

(BUR) Sound check:
Also, Japanese version of game contain traces of "SOUND CHECK" presence between other game strings, but all code for handling and typing this string to screen has been disabled totally.

Buggy Popper, Bump'n'Jump

(GEN) Continue:
Hold Select on first controller and A + B on second controller at the game over screen. Then, press Start, Start on second controller while all buttons are still held.

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

(BUR) Sound test:
String contains in second bonus game stings table, seems it was possible to switch to that mode from this bonus game. But no accessing to this string procedures has been found. 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:
Level:
Password:
Note: levels 61, 62, 63, 64 are Special.

Burai Fighter

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

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

Capcom Barcelona '92, Gold Medal Challenge '92

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

Captain Ed

(UNI) Invulnerability:
On boss sequence in no-flight game mode pause the game then press at on first controller Up + A + B + Select. After game is unpaused you will invulnerable.

(UNI) Secret passwords:
こひあ-Play with infinite energy.

(UNI) Secret words:
Enter as player name:
きんた-Warp to BOSS stage.

Captain Saver, Power Blade 2

(UNI) Sound mode:
At title screen hold Left + A + B on second controller then press Start button on first controller.

(BUR) Hidden text:
There is hidden message inside game ROMs: "TOSHIKAZU IWASA".

Captain Skyhawk

(FIX) Nine lives, all weapons:
At title screen press Start and wait until the second title screen appears. Before screen disappears, hold Down + A buttons.

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

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

Captain Tsubasa (J), Tecmo Cup - Soccer Game

(UNI) Password generator:
Bits:










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

Captain Tsubasa Vol. II - Super Striker

(GEN) Sound test:
At title screen hold A + B + Select + Start.

(UNI) Password generator:
Bits:









Random:
Password:

Castelian, Kyoro Chan Land

(BUR) GameGenie:
SAOKUPSZ (US version)
SAXKUZSZ (Japan 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 (US version)
SAXKSZSZ (Japan 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 Quest

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

Castle of Dragon, Dragon Unit

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

(UNI) Test mode:
At 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 game in test mode but cannot complete any level, but you can select "EXIT" option and continue normal game.

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):

Cat Ninden Teyandee

(UNI) Sound test:
On title screen hold A + B + Select then press Start.

Joe & Mac - Caveman Ninja

US version:

(UNI) Secret words:
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 first controller.
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:
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.

Challenger

(GEN) Love story:
When in SCENE 2 press on first controller 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. After game over you will return to title screen but instead of "REALTIME ACTION ADVENTURE!" you will see message "KIKU MEGU LOVE STORY!". 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 (菊田政昭). He put secret codes with messages almost in all his games under HUDSON label.

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

Championship Bowling

(BUR) Hidden text:
There is a hidden copyright text in ROM: "1989ANOTHERltd.", " 1989 Another Ltd. ", Another Ltd. 1989/2/27 New", "$CA", "$DE", "$B0", "$BC", "$DE", "$AE", "$DD". Last 7 symbols are unknown, it seems this is not ROM pointers. Maybe some japan encoded strings.

Championship Pool

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

Chaos World

(BUR) GameGenie:
ZAKPOLGA-Code enables in-game debug screen instead quick info screen popping up when player is stand still spme time.

Chessmaster, The

(BUR) Hidden text:
There is hidden version text inside ROM: "The ChessmasterVersion 1.3".

Chester Field - Ankoku Shin heno Chousen

Beta version:

(BUR) Hidden text:
There is a hidden copyright text in 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

(FIX) Only level bosses:
Press A, B, Left, Right, Left, Right, Down, Down, Up at the title screen.

Chiller

HES version:

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

AGCI version:

(UNI) CRC test:
Hold Up + A + Select then press Reset button. Messages "NTSC PAL VERSION 21 SEPT 1990, NTSC MODE, PRG CHECKSUM 1681, MODS BY SCOTT SCHRYVER" will appear. Note: 3.14 goodnes seems have naming mistake for thgese ROMs, since for HES version title screen says "BY AGCI" but for AGCI version "BY SHAREDATA".

Chitei Senkuu Vazorudaa, Wurm

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

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

(BUR) Hidden text:
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:
Press Down, B, Left, A, Up, A, B, Right at the title screen then press following button:
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) Ending sequence:
Press Down, B, Left, A, Up, A, B, Right, Select, A, B at the title screen.

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.

Chu Da D

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

Chuugoku Senseijutsu

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

City Adventure Touch - Mystery of Triangle

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

Clash at Demonhead, Dengeki - Big Bang!

Japan version:

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

US version:

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

Clu Clu Land

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

Commando, Senjou no Ookami

All versions:

(FIX) Secret passages:
At the title screen press Left, Left, Left, B, B, A, A, A, A on second controller then press Start on first controller. From nou you will see underground passages on level.

(FIX) Level select:
At title screen press Left, Right, A, B, A, Down, Up on second controller then hold A on first controller and by pressing Select button select desired level.

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

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

US version:

(BUR) GameGenie:
PEKGKSYA-Enables "Timer Ajust" cheat. Use this code, then at title screen press A, Left, Left, Left, Up, B, Up, A, Right, Right, Right on second controller. Then any time you can press A + B on second controller to speed up game.
AEUGXSNA-Enables "Invulnerability" cheat. Use this code, then after gameover and returning to the title screen press Down, A, A, Right, B, B, Up, Up, A, Left, Left, B, Down on second controller, select 1P or 2P continue mode at tile menu then hold A + B on first controller and press Start.

(BUR) Disabled cheats:
There is a lot more cheats was in game at development stage and previously in japanese version. Cheat B, Down, Up, A, Left, Left, Right on title screen is checked and triggered but there is no code that uses it's cheat flag in whole ROM. 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. Other cheat sequence present in ROM but not checked by any part of code is Left, Left, Up, B, Up, A, Right, Right, Right.

(BUR) Hidden text:
There is hidden text in 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 (Thanks Pongbashi for info). 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".

Japan version:

(UNI) Frame advance:
At title screen press B, Down, Up, A, Left, Left, Right on second controller. In game press or hold Select to stop or move frame by frame enemies.

(BUR) GameGenie:
PAEKXSYA-Enables "Timer Ajust" cheat. Use this code, then at title screen press A, Left, Left, Left, Up, B, Up, A, Right, Right, Right on second controller. Then any time you can press A + B on second controller to speed up game.
AENKEKNA-Enables "Invulnerability" cheat. Use this code, then after gameover after returning to title screen press Down, A, A, Right, B, B, Up, Up, A, Left, Left, B, Down on second controller, select 1P or 2P continue mode at tile menu then hold A + B on first controller and press Start.
AEVKEKNA-Enables some bad cheat. Use this code, then after gameover after returning to title screen press on second controller Left, B, B, Right, select 1P or 2P continue mode at tile menu then hold A on first controller and press Start. Game will hang up. ;)

(BUR) Hidden text:
There is hidden text in ROM file: "86/8/6 FOR JPN VERSION".

Conquest of the Crystal Palace, Matendouji

(GEN) Sound test:
Hold Select and press A + B at the title screen. Use the D-pad to select a song and press A to play the current selection.

(GEN) Cheat mode:
First press A + Select, then press B + Select at the title screen. Repeat these entries until a sound is played to confirm correct code entry. 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

Contra (U), Gryzor, Probotector (E)

All versions:

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

Japan version:

(GEN) Sound test:
Hold A + B and press Start at the title screen to display the sound test screen to hear the game's sound effects and music.

(UNI) Stage select:
Press Start button at title screen to begin the game, after that press and hold Up + Left + A + Select buttons before title desappear.

Contra Force

(GEN) Continue:
At the "game over" screen hold A + B + Select then press Start.

Cool World

(UNI) Unlock `Hotel 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:
There is a hidden copyright text in ROM: "MUSIC DRIVER V1.0 (C)JONATHAN DUNN & OCEAN SOFTWARE".

Cosmic Epsilon

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

(GEN) Secret message:
Press Up, Up, Down, Down, Left, Right, Left, Right, B, A at the title screen. 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:
Press A, B, Right, Left, Right, Left, Down, Down, Up, Up at the title screen after the introduction sequence ends and the logo appears. This is exactly "Konami code" backwards. ;)

(GEN) Another world mode:
Press Up, Down, Left, Right, A, Down, Up, Left, Right, B at the title screen 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.

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

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

(BUR) Secret message:
In adition 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.

Crackout

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

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:
At the title screen press Select, Select, A, B, B, Select, B, Select, A then press Start.
Info from Яковлев Виктор

(UNI) Invulnerability:
At the title screen press B, B, B, A, B, Select, Select, B, A, A, Select then press Start.
Info from Яковлев Виктор

(UNI) Invulnerability and Level select:
At the title screen press Select, B, Select, B, A, B, B, A, B, B, Select, Select then press Start.
Info from Яковлев Виктор

Crystalis, God Slayer - Haruka Tenkuu no Sonata

(UNI) Pause game:
For pause game press B on second controller.

(FIX) Level warp:
While game hold A + B on first controller then by pressing A on second controller you can cycle through 16 places of game.

Dai Meiro - Meikyuu no Tatsujin

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

(UNI) Secret passwords:
OWARIDAI-Ending sequence

Dai-2-Ji - Super Robot Taisen

(BUR) Hidden text:
There is some hidden version text in ROM: "Sirius Works 0061991.09.27".

Daikaijuu Deburas

(UNI) Map select:
If you complete the game and your last save was in levels 15 or 16, you will be able to use cheat codes when starting new game. After game ending you shouldn't clear SRAM data or save any other games to be able to use this cheat any time you want. Just start new game by pressing Start at title screen, while starting cutscene 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 1 player game.

(UNI) VS Map select:
If you complete the game and your last save was in levels 15 or 16, you will be able to use cheat codes when starting new game. After game ending you shouldn't clear SRAM data or save any other games to be able to use this cheat any time you want. Just start new game by pressing Start at title screen, while starting cutscene 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 players versus game.

(UNI) Sound select:
If you complete the game and your last save was in levels 15 or 16, you will be able to use cheat codes when starting new game. After game ending you shouldn't clear SRAM data or save any other games to be able to use this cheat any time you want. Just start new game by pressing Start at title screen, while starting cutscene is running press Up, Up, Down, Down, Up, Up, Down, Down then press Start to select game music and sounds.

Daiku no Gen San 2 - Akage no Dan no Gyakushuu

(UNI) Level select:
Press Up, Right, Down, Left, Up, Right, Down, Left when "Irem" logo appears, then start the game.

(UNI) SE test:
Hold A button on second controller before title screen appears, then press Start on first controller to skip intro.

(UNI) BGM test:
Hold B button on second controller before title screen appears, then press Start on first controller to skip intro.

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

(GEN) Suicide:
During the game hold Select, press Start, release, then press Start.

Darkman

(UNI) Level select:
At title menu select "HI SCORE" option, hold Right on first controller 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 acces it. Enter "DERMA" as password. Now you can select any game sublevel and boss shooting including ending message.

(BUR) Hidden text:
There is a hidden copyright text in ROM: "MUSIC DRIVER V1.0 (C)JONATHAN DUNN & OCEAN SOFTWARE".

Dash Galaxy in the Alien Asylum

(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 game play.

(BUR) Hidden text:
Game ROM contain hidden version string: "Wed Sep 13 16:15:54 1989".

Datsugoku, POW - Prisoners of War

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

Deadly Towers, Mashou

(BUR) GameGenie:
To enable these debug functions normally it needs some manipulation with Family keyboard probably... Maybe other device. To enter debug mode hold A + B button on first controller and press Reset. Next options should be selected by some device manipulation. By using GameGenie codes you can switch to these options directly, but for manipulating it need the same device, I think, so it almost useless.
OZVAZPSX+TAVALOLO-Unknown
OZVAZPSX+IPVALOLP-CRC test
OZVAZPSX+LPVALOLO-Monitor adjust
OZVAZPSX+ZZVALOLO-Color adjust
OZVAZPSX+TZVALOLO-Timer on
OZVAZPSX+ILVALOLP-Sound check
OZVAZPSX+TLVALOLO-Unknown

(BUR) Hidden text:
Game ROM contain 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 !".

Defender II, Star Gate

Japan version:

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

Demon Sword, Fudou Myouou Den

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

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

Destination Earthstar

(FIX) Level skip:
Hold Down + Select and press B, B, B on second controller during game play, release these buttons and you will hear a sound confirm correct code entry. Then press Right + A + Start on second controller to advance next level.

Destiny of an Emperor, San Guo Zhi - Ying Jie Zhan, Sangokushi - Eiketsu Den, Tenchi wo Kurau (J)

(GEN) Sima Yi thunder defense:
This is not actually cheat, combination of buttons 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 game.

Dig Dug II

(GEN) Level select:
When the title screen stops moving press A + Select + Start.

Digital Devil Monogatari - Megami Tensei II

(BUR) Hidden text:
RESET routine in this game uses string "DDSII PRESENTED BY ATLUS & PROGRAMING BY COZY" to check if game was soft or hard reset.b%
Dirty Harry

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

Dizzy The Adventurer

(BUR) GameGenie:
Absolutely all games by Codemasters have internal PRG ROM and CHR RAM testing routines. They called "Smiley tests". Tests are normally enabled, but for triggering it needs pressing all D-pad buttons. For performing PRG ROM test it needs to hold Up + Down + Left + Right + A + Select + Start. For performing CHR RAM test it needs to hold Up + Down + Left + Right + B + Select + Start. Without controller modification it is impossible. GameGenie codes allows you to do not use D-pad buttons for triggering cheat, only A + Select + Start and B + Select + Start. But it affects on ROM's CRC. I ran these tests normally by cheating with debugger, so I wrote normal CRC tests results in brackets.
EUXPUNNL-PRG CRC test (test ok)
ANUPNNYY-CHR RAM test

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

(BUR) GameGenie:
LAKSYKVE+OTSIAGNV-Subroutine seems broken or need proper initialization. With this code "Stage select" mode with some not working "Option" mode will be enabled instead of "Sound test" mode.

Don Doko Don (J)

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

Don Doko Don 2

(BUR) GameGenie:
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:
Press A, B, Right, Left at the title screen, then press one of the following combinations to enter another level.
Up + A-(1) Home Town World
Up + B-(2) Lake Side World
Up + A + B-(3) Forest World
Up + Select-(4) Sky World
Up + A + Select-(5) Oasis World
Up + B + Select-(6) Cave World
Up + A + B + Select-(7) Pond World
Up + Right-(8) Harbor World
Up + Right + A-(9) Ocean World
Up + Right + B-(10) Ghost Town World
Up + Right + A + B-(11) Dark Forest World
Up + Right + Select-(12) Castle World

Donkey Kong Country 4

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

Doraemon (J)

(GEN) Continue:
Hold any directional pad button (e.g., Up), then press Start before "game over" screen switches to title screen.

(GEN) Warp to world 1:
At title screen hold A + B buttons on first controller then press Start.

(GEN) Warp to world 2:
At title screen hold A + B + Select buttons on first controller then press Start.

(GEN) Warp to world 3:
At title screen press A + B + Select once, release and hold A + B + Select again and now press Start.

(GEN) Extra Prize:
Each fourth enemy killed, left one of four prizes by random.

(GEN) Super Prize:
At World 1 kill enemies in special sequence: KOBUN (Red man with black hat), KOBUN, NAME (Caterpillar), GOZURA (Creature with tube instead of nose), YUBOU (sone kind of UFO), KOBUN. New prize appears, it will give you invulnerability on 15 seconds.

(GEN) Programmers Face:
At World 1 on the star "KoyaKoya", in "Garutaito" (where is boss) in the building of "Mining Industry" on the right, shout in microphone and shoot at the same time. Programmer's face will appear.

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

(BUR) Hidden text:
ROM contain hidden text not used in any part of game, just programmers copyright and program message "DORAEMON WORLD3 WRITTEN BY KIKU VER1.9 86/10/31". "KIKU" is a programmer of HUDSON Kikuta Masaaki (菊田政昭). He put secret codes with messages almost in all his games under HUDSON label.

Double Dragon 4, Target Renegade

(BUR) Developer's info:
This game using for padding some info about developers. 
TARGET RENEGADE
COPYRIGHT TAITO AMERICA CORP 1989
    PORGRAMMER   STEPHEN RUDDY
        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 8248
   ROLL US YOUR CAP GRANDAN

Double Dragon II - The Revenge

All versions:

(BUR) GameGenie:
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 0xFFF6 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 first controller Select then press on first controller A to skip current level, B kill all curent enemies and advance to next point, Up or Down to kill one nearest enemy at front or back side.

Japan version:

(BUR) GameGenie:
There is a lot more disabled features in game since development stage. 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 non-japan versions.
PAKNYAAA-Enables copyright screen as in non-japan versions, but since there is no latin letters message completely unreadable.

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

(BUR) GameGenie:
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 0xFFF6 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 cheat mode. In this mode some debug features available:
In game hold on first controller Start then press on first controller A to skip current level.

Downtown - Nekketsu Koushin Kyoku - Soreyuke Daiundoukai

(BUR) GameGenie:
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 0xFFF6 address and uses some bits set to enable hidden features.
AXNYVYAA-Bit 5. Unknown permanent effect in game.
EKNYVYAA-Bit 7. Enables cheat mode. In this mode some debug features available:
In game hold on first controller Select then press on first controller A to skip current level.

Dr. Mario

(GEN) In-game reset:
Press A + B + Select + Start during game play.

Dragon Buster

(BUR) Hidden text:
RESET routine in this game uses string "D.BUSTER" to check if game was soft or hard reset. Also game contain some hidden copyright text at end of file: "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, but in this game this sting doesn't used as test data.

(BUR) GameGenie:
GAUYNTEI-At reset game performs some manipulations with expansion port sending and reading some data sequence to it then compare resulting data with original. Probably there is some special device for testing purposes only. With this code you may pass device checking and see CRC test itself. If data matches, game performs partial (one from each 15 bytes) data CRC tests. While checking PRG data display color is red and if check fails display will remain red and game stops. While checking CHR data display color is green and if check fails display will be flashing from red to green infinitely. GoodNES version ROM pass this check normally.

Dragon Fighter

(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 mode:
At the title screen hold A + B then press Start.

(UNI) Level select:
Hold A + B button on first controller and press Reset, continue holding A + B after title screen appears about 30 seconds. A sound will notice you that cheat is enabled and you can release buttons. Then before starting demo sequence you can hold one of following buttons on second controller to select desired level and then press Start on first controller. Previously game has another cheat handling routine. This routine disabled at all in release version. There was another "obj test mode" along with "sound test mode". You might access it only after enabling cheat mode along with level selecting capability. "obj test mode" was enabled by pressing B + Select + Start on first controller, "sound test mode" is A + Select + Start. In final release "obj test mode" was disabled and "sound test" was moved to simplier cheat combination.
Right-2 level
Down-3 level
Up-4 level
B-5 level
A-6 level

(UNI) Restore energy:
Any time in game you can restore current energy. Each level have it's own cheat sequence for that. Pause the game then enter one of the following codes according to current game level to restore 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
Info from Яковлев Виктор

(BUR) GameGenie:
ZEVEUSLE-Enable "obj test mode" instead "sound test mode".

Dragon Quest (J), Dragon Warrior (U)

US version:

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

Dragon Quest III, Dragon Quest VI, Dragon Warrior III, Yong Zhe Dou E Long - Dragon Quest VI

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

Dragon Quest IV, Dragon Warrior IV, Yong Zhe Dou E Long - Dragon Quest IV, Yong Zhe Dou E Long - Dragon Quest VII

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

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

(GEN) Sound test:
Hold Up + A + B on second controller and press the Reset button on the NES. Use first controller to select various game sounds.

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

(FIX) Extra 20 dragons:
Skip first training game level, after some plot animation when you return to title screen with one of three dragons obtained accordingly to results of first training stage, hold A + B buttons on second controller then press Start on first controller to start new game with extra 20 dragons.

Dragon's Lair

All versions:

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

Japan ane European versions:

(BUR) Hidden text:
There is a lot of source codes inside ROM all along with gamecode and data. There is no such source codes in US version since it only 128K in size. 
;--------------------------------------
; Throw a dagger control routines
; ----- - ------ ------- --------

; Initialization, this routine starts a dagger if there is one free

; This routine was modifyed to cope with axes and fireballs

; IN
; --
; A=Direction (BIT6=0 - Facing right  1 - Facing left)


D_INIT
        STA     ZPAGE_BYTE2

        LDX     WEAPON_TYPE
        BEQ     DI_3ON  ;3 daggers allowed
        DEX
        BEQ     DI_2ON  ;2 axes
        JMP     DI_1ON  ;1 fireball

DI_3ON  LDX     #2*D_VAR_LEN
        LDA     D_VARS+D_X_OFF+(2*D_VAR_LEN)
        BEQ     DI_FREE
DI_2ON  LDX     #1*D_VAR_LEN
        LDA     D_VARS+D_X_OFF+(1*D_VAR_LEN)
        BEQ     DI_FREE
DI_1ON  LDX     #0*D_VAR_LEN
        LDA     D_VARS+D_X_OFF+(0*D_VAR_LEN)
        BEQ     DI_FREE

        RTS

Dragon, The

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

Drop Zone

(UNI) Secret words:
To enter any player names for the hi-score table you must get at least 10000 pts. After entering any name wait for the hi-score table appears and press Up, Right, Down, Left on first controller. Small green enemy will appear left to hi-score table as animated cursor. You can switch with Up or Down buttons cursor position and select one of 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
NOJ-Does nothing
RRP-Doubles cloak time
CZN-Start from WAVE 5
FHO-Start from WAVE 10
INR-Prevent explosion when volcano particles or NMEYE enemy interfere with player
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

Dungeon & Magic - Swords of Element

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

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

(UNI) Hidden level map:
At thrid scene of opening sequence (eye) before text starts displaying press A, A, A on second controller. Then press Start on first controller and begin new game. Throught the game now you can press Up on the second controller to view current level map.

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

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 button selecting song, by pressing A button play song.
7777-Enemy Viewer
Press Up or Down and you'll see the enemy on the right side of the titlescreen change. Press Start again to return to 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)

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

(UNI) Easter egg 2:
Press Up, Down, Left, Left, Left, Right, Up, Right, Left, Down at the title screen.
Info from Яковлев Виктор

Earth Worm Jim 2 (Super Game)

(UNI) Debug feature:
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.
Info from Яковлев Виктор

Earth Worm Jim 3

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

Egypt

(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 area right above edit menu frame window, 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.

(UNI) Sound and CHR test:
Hold Right + B then press Reset.

Elite

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

Esper Dream 2 - Aratanaru Tatakai

(UNI) Secret words:
Enter one of following words as player name, both codes does the same.
"こや　２"-Extra 255 gold
Hold Up + Left on the second controller before Start and hold until next screen appears.
"あ０き　"-Extra 255 gold
Hold Up + Left on the second controller before Start and hold until next screen appears.

Exodus

(GEN) Level select:
Press A to advance to the next level or B to return to the previous level at the level selection screen.

F-1 Sensation, Formula 1 Sensation

(UNI) Empty cheat 1:
Press Up, Up, Down, Down, Left, Right, Left, Right, B, A at the title screen, a sound will confirm correct code entry. Cheat does nothing. Probably there was some other cheat at development stage.

(UNI) Empty cheat 2:
Press B, A, B, A at the title screen, a sound will confirm correct code entry. Cheat does nothing. Probably there was some other cheat at development stage.

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

(UNI) Secret words:
Enter one of wollowing words as player name in "GRAN PRIX" mode. When name 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) Secert passwords:
Select "saved..." game mode, enter 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:
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

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

F-15 Strike Eagle

(BUR) Abuse filter:
No one 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 first controller and press Reset.

(UNI) Reset Battery RAM:
Hold A + B on second controller and press Reset.

Famicom Disk System BIOS

(UNI) Internal test:
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:
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.

Famicom Meijin Sen

All versions:

(BUR) GameGenie:
GEOKYAAX-Engine test mode. You can scroll backgroung in any direction with first controller, move test sprites and write sting "TEST0123456789TEST" to the backgroung with second controller buttons. Buttons A and B on first controller play some test sounds.

REV0 version:

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

Family Boxing, Ring King

(UNI) Super power:
At power points arrangement screen when you can set up your player powers and see enemy powers, enter following buttons sequence: A on second controller, A, Select, A on first controller, B on second controller, Select on first controller, A, B on second controller, B, B on first controller. From now, your punch power will be maximum and enemy's punches won't damage you. But you couldn't save your progress with passwords, password string will be always "ANTAWOTUYOI" which means "YOU ARE STRONG".

Family Circuit '91

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

Family Circuit (J)

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

Family Computer - Othello, Othello (U)

US version:

(FIX) Slot machine mode:
At player selection screen hold Select and press A or Start to enable slot machine for player 1 or B to enable slot machine for player 2. Mode name will change to "Slot". A slot machine will appear corresponding player will loose and randomly change some tokens to make possible to this player to win anyway. Only two player mode for slot machine is available.

(UNI) Edit mode:
At level select menu before entering name hold on second controller Right + A and on first controller B + Select then press A and hold it until name input mode appears. When entering the game you will be able to put black or white tokens by pressing A or B buttons, then press Select to accept. Note: if you want to use edit mode with "Slot" cheat, you should press the same buttons at mode selection screen.

Japan version:

(FIX) Slot machine mode:
At mode selection screen hold Select and press A or Start to enable slot machine type 1 or B to enable slot machine type 2. Mode name will change to "Slot". Only two player mode for slot machine is available. This mode is different from US one, there will be just the same game othello as usual but player may put tokens only at random places according to slot machine choise or dice roll.

Family Jockey

(BUR) Hidden text:
Game contain some generic NAMCO hidden copyright text: "COPYRIGHT 1986 NAMCO LTD.ALL RIGHTS RESEEVEDPROGRAMED BY T.FUKUMOTO". 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:
GANNVTEI-At reset game performs some manipulations with expansion port sending and reading some data sequence to it then compare resulting data with original. Probably there is some special device for testing purposes only. With this code you may pass device checking and see CRC test itself. If data matches, game performs partial (one from each 15 bytes) data CRC tests. While checking PRG data display color is red and if check fails display will remain red and game stops. While checking CHR data display color is green and if check fails display will be flashing from red to green infinitely. GoodNES version ROM pass this check normally.

Family Pinball, Rock 'n' Ball

(FIX) Battle flipper controls both flippers:
Press at the title screen Up, A, Right, B, Down, Left on second controller.

(FIX) Extra 5 balls:
Press at the title screen Left, Right, A, Down, B, Up on second controller.

(FIX) Extra 10 balls:
Press at the title screen B, Left, Right, A, Up, Down on second controller.

(FIX) Use flipper with highest rebound:
Press at the title screen Down, B, Left, Right, Up, A on second controller.

(FIX) Alternate vertical flipper control:
Press at the title screen Right, Up, B, Left, A, Down on second controller. In pinball, first controller will control the bottom flipper and second controller will control the top flipper.

(FIX) Alternate horizontal flipper control:
Press at the title screen A, Down, Up, Right, Left, B on second controller. In pinball, first controller will control the bottom flipper and second controller will control the top flipper.

Family Quiz

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

Famista '89 - Kaimaku Han!!

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

Famista '90

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

Famista '91

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

Famista '92

(UNI) In-game reset:
Press Start button then immediately press Select.

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

(BUR) GameGenie:
PEKNSTAA-Enable simple test menu cheat.
Hold A + B at title screen and press Start to enter Test menu.

Famista '93

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

(BUR) GameGenie:
PEUNVTAA-Enable simple test menu cheat.
Hold A + B at title screen and press Start to enter Test menu.

Famista '94

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

(BUR) GameGenie:
PEKNVTAA-Enable simple test menu cheat.
Hold A + B at title screen and press Start to enter Test menu.

Fantastic Adventures of Dizzy, The

(BUR) GameGenie:
Absolutely all games by Codemasters have internal PRG ROM and CHR RAM testing routines. They called "Smiley tests". Tests are normally enabled, but for triggering it needs pressing all D-pad buttons. For performing PRG ROM test it needs to hold Up + Down + Left + Right + A + Select + Start. For performing CHR RAM test it needs to hold Up + Down + Left + Right + B + Select + Start. Without controller modification it is impossible. GameGenie codes allows you to do not use D-pad buttons for triggering cheat, only A + Select + Start and B + Select + Start. But it affects on ROM's CRC. I ran these tests normally by cheating with debugger, so I wrote normal CRC tests results in brackets.
EUKUVSNL (US version)
EUSLEUNL (Aladdin version)		-PRG CRC test (test ok)
ANVLXSYY (US version)
ANVLKUYY (Aladdin version)		-CHR RAM test

Fantasy Zone (J)

(UNI) Sound test:
After beating that damn hard game, when "staff" rolls over press on second controller Left button 33 times. After "staff" ends, sound test mode will appear.

Fantasy Zone (Tengen)

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

(UNI) Level skip:
In game press Select then press B, A, B, A, Start, Select. A sound will confirm correct code entry.

Faria - A World of Mystery and Danger!, Faria (J)

US version:

(FIX) Secret words:
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.

Japan version:

(UNI) Secret words:
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 by Dragon Co

(BUR) Hidden text:
There is some hidden copyright text inside 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 player hold Left button.

Fighting Road

(UNI) Test mode:
Hold A + B on first controller 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 0x0D, address 0xB800, old sound test routine, all function calls are wrong and moved lately to another addresses, so routine totally unfunctional, but can be repaired besides contain all data strings and code to work properly.

Final Fantasy (J), Yin He Shi Dai

(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.

Final Fight 3

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

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

All versions:

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

US version:

(UNI) Password generator:
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 (J)

(UNI) Sound test:
When between battles after saving current game, when asked, select "no continue" option to end current game. After that press Up, Down, Left, Right, Up, A to enter sound test mode.

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 NES system, press Up, Down, Left, Right, Up on first controller.

Fire Hawk

(GEN) Level 2:
Hold A and press Start at the title screen to begin game play at level 2.

(UNI) Secret words:
Enter one of following words as player name for the hi-score table and you'll see some programmers messages:
"DIZZY......"=>"BUY IT NOW!" (Dizzy demo)
"CREDITS...."=>"FAMOUS NOW " (Credits screen)
"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 "

(BUR) GameGenie:
Absolutely all games by Codemasters have internal PRG ROM and CHR RAM testing routines. They called "Smiley tests". Tests are normally enabled, but for triggering it needs pressing all D-pad buttons. For performing PRG ROM test it needs to hold Up + Down + Left + Right + A + Select + Start. For performing CHR RAM test it needs to hold Up + Down + Left + Right + B + Select + Start. Without controller modification it is impossible. GameGenie codes allows you to do not use D-pad buttons for triggering cheat, only A + Select + Start and B + Select + Start. But it affects on ROM's CRC. I ran these tests normally by cheating with debugger, so I wrote normal CRC tests results in brackets.
EUEAYKNL-PRG CRC test (test ok)
ANOELKYY-CHR RAM test

Flintstones, The - The Rescue of Dino & Hoppy

Japan version:

(UNI) Debug mode:
After "PUSH START BUTTON" message starts flashes, press A, A, B, B, Right, Down, Down, Down, Down, Down, Down, Down, Left, Start to enter to debug mode. Now you can choose one of two game modes "NORMAL" and "NOHIT", the last one gives you invulnerability and all extra abilities. After mode selecting, number will appears. Switch numbers by pressing Up or Down if you press A button, you will here sound or music according to number, if you press Start then you will be moved to level with this number.

(UNI) Test mode:
After "PUSH START BUTTON" message starts flashes, press A, B, A, B, Up, Right, Right, Right, Down, Down, Down, Down, Left, Left, Start to enter to test mode. This mode is simple version of "Debug mode", just allow you to select and hear sound and mucis and set up desired level same time. No "NOHIT" mode and no extra abilities are available.

US version:

(BUR) GameGenie:
SKKALTIZ+VEKAGTNA-This enables back disabled cheat for entering debug mode. Now after "PUSH START BUTTON" message starts flashes, press Up, Right, Right, Right, Down, Down, Down, Down, Left, Left, Start. Now you can choose one of two game modes "NORMAL" and "NOHIT", the last one gives you invulnerability and all extra abilities. After mode selecting number will appears. Switch numbers by pressing Up or Down if you press A button, you will here sound or music according to number, if you press Start then you will be moved to level with this number.
Info from 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.

(BUR) Hidden text:
RESET routine in this game uses string "misako" (programmer's name) to check if game was soft or hard reset.

Flipull - An Exciting Cube Game

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

Flying Warriors, Hiryuu no Ken III - 5 Nin no Ryuu Senshi

(UNI) Secret passwords:
MUSIC-Sound test
END-Ending sequence
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" mean latest stage.
Info from Яковлев Виктор

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

(BUR) GameGenie:
SUVXPGSU+XVXZGLAV (English versions)
XOKZTLXO+XVEZPZAV (Japan version)
-Enables copyright easter. While in game, enter game menu and select "ADVICE" option, now press and hold A, B buttons on second controller and enter sequence Up, Down, Left, Right, Up, Left, Down, Right on first controller. From now instead of generic advice Ivan or Chris will talk three times in row: "COPYRIGHT 1989 HOMEDATA! COPYRIGHT 1989 HOMEDATA!! COPYRIGHT 1989 HOMEDATA!!!".

Freedom Force

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

(UNI) Secret message:
After all levels completion, when message "CONGRATULATION" appears on screen, on second controller press %y80. Messae "HIRO-KUN" appears.

(BUR) Secret message:
There is some seems unused tilemaps in bank 1 with some interesting texts. There is no code patterns with bank 1 switching, so there is no calling of these strings in NES version. 
00006830: 2D 22 28 27 16 30 1E 25 1C 28 26 1E 00 2D 28 00 TION=WELCOME'TO'
00006840: 28 2E 2B 00 28 1F 1F 22 1C 1E 11 00 00 00 00 00 OUR'OFFICE8'''''
00006850: 00 26 2B 00 2B 22 1C 21 1A 2B 1D 12 00 00 00 00 'MR'RICHARD9''''

(BUR) GameGenie:
EENVZLAA-Enables some game features designed to work with VS arcade system, based on NES. It will enable hi-score table, "INSERT COIN" message and some other stuff.

(GEN) Unlockable:
After completing all levels, message with some secret words will appears. Secret words are: "SPYHUNTER", "XENOPHOBE", "PLATOON". All theseis are other SunSoft titles, but usage of these fords is unknown.

Fuzzical Fighter

(UNI) Hyper debugger mode:
At the title screen hold A + B on second controller then press A + Select or B + Select on first controller.

G.I. Joe (U)

(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:
PTUAOYZY-With this code when using secret password for "Sound test" mode you'll get disabled in final release CHR tiles test mode instead.
PENEXTAA-At development stage programmers was using quick "Stage Select" mode instead of using passwords. This GG code enables this mode back. Just select "Password" option on title menu.
AEKEAAAE-This cheat disabled in final release allow you win or loose current level immediately. Just press Right + A + B to kill current player, press Left + A + B to skip current level.

Galaxian

(UNI) Music player:
Power console then press Reset 44 times, then press and hold A + B on second controller then press Reset one more time. Screen will changes, at left side of screen will fall flashing in music rhytm 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 on in another way. Reset system only 10 times after power on, then shout in microphone on second controller of Famicom console 4 times. This need additional 34 resetting before reaching second melody.

(BUR) Hidden text:
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.

(BUR) Hidden text:
There is a hidden copyright screen at end of ROM file: "(c)1991 Activision. 01/21/91 David J. Ross" for European version and "(c)1990 Activision. 06/28/90 David J. Ross" for US version.

(BUR) GameGenie:
PAOOXPAA-Enable "dr daves cheat screen" after selecting player number (appears only for 1 player mode).

Gambler Jiko Chuushin Ha - Mahjong Game

(BUR) Hidden text:
There is a hidden version text in ROM: "Thu Jul 28 00:19:00 1988".

Gambler Jiko Chuushin Ha 2

(BUR) Hidden text:
There is a hidden version text in ROM: "ASM-2J 90/09/20=1.02R1".

Ganbare Goemon! - Karakuri Douchuu

(UNI) CRC test:
Hold A + B buttons 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

(UNI) Area selection:
At the title screen by pressing combinations of A or A + B you may select game area then press Start to enter it.
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

(BUR) Hidden text:
There is a hidden copyright text in ROM: "Written by Masashi Itoi. (c) Copyright MARS Corporation. 1988".

Gauntlet (U)

(GEN) In-game reset:
Press A + B + Select + Start.

Gekitou Pro Wrestling!! - Toukon Densetsu, Tecmo World Wrestling

(GEN) Sound test:
At title screen press Up + Left + A + B then press Select.

Getsufuu Maden

(BUR) All items:
Game still perform check for A button held on start game. In this case it sets up 0x7D9 and 0x7DA variables according to inventory items to 0xFF. But before game starts this variables initialises with 0x01 by default, so cheat is discarded. Probably this was quick lazy debug feature.

(BUR) GameGenie:
SUUSUOKN-Enables some development stage 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.

Ghosts'n Goblins, Makai-Mura

(FIX) Level select:
Hold Right and press any of A or B or both buttons three times total. Release Right and press Up, B, B, B, Left, B, B, B, Down, B, B, B, Start. A number and letter will be displayed. Press A or B to select a new starting level and press Start to begin game play.

(FIX) Credits message:
Complete both quests, then at ending screen press A, B, Up, Down, A, B, Left, Right.

Ghoul School

(UNI) Debug mode:
At "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.

Gimmick!, Mr. Gimmick

(GEN) Music sampler:
At the title screen hold Select, press Start.

Goal! 2, Goal! Two, Goal!!

(UNI) Hard mode:
Hold A + B + Select + Start on first controller and press Reset. Title name color will change to blue for Japanese version, or Title background color will changed to dark blue for US version.

(UNI) Music test:
Hold A + B on second controller and press Reset.

Godzilla - Monster of Monsters!, Godzilla (J)

(FIX) Secret passwords:
Note: the passwords uses the number "0", and 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-View opening and ending sequences
M0NSTER 0-Ghidora fight

Golgo 13 - Dai 1 Shou - Kamigami no Tasogare, Golgo 13 - Top Secret Episode

(GEN) Stage Select:
During the demo a flash will appear over one eye. When this happens press Start then hold Up + A + B on first controller and Up + Left + A + B on second controller. After that press Start on first controller. Enter one of the following codes to start at the corresponding level:
00-Level 1
08-Level 2
0A-Level 3
12-Level 4
1E-Level 5
32-Level 7
38-Level 8
3B-Level 9
40-Level 10
49-Level 13

Golgo 13 - The Riddle of Icarus, Mafat Conspiracy - Golgo 13

Japan version:

(UNI) Debug menu:
At "Act number" screen, before animation stops hold Select button on first controller, then quickly press A, B, A, B, A, B, A, B, A, B, A, B, A, B, A, B. You will be able to select any plot animation or level.

US version:

(BUR) GameGenie:
IAUKZLYA-Enables debug menu disabled in final US release, but all code has left. You can select any stage and view any plot movies.

Goonies II, The - Fratelli Saigo no Chousen, Goonies II, The (U)

(UNI) CRC test:
Hold A + B buttons then press Reset. After some time message "GOONIES2 ONE" appears if PRG CRC test is OK and "GOONIES2 TEN" if CRC test fails. European version of ROM from GoodNES 3.10 has "TEN" message.

Gradius (J)

(GEN) Full power-up:
Pause game play and press Up, Up, Down, Down, Left, Right, Left, Right, B, A, Start for missiles, items, and shields. Note: 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 buttons 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 match CHR test.

Gradius II

(GEN) Extra 30 lives:
At the title screen, press Up, Up, Down, Down, Left, Right, Left, Right, B, A.

(GEN) Sound test:
Hold A + B and press Start at the title screen.

Grand Master

(GEN) Level Select:
On "PRESS START" screen push Down, Left, Right, Down, Up, A + B, B, A, A + B.

(BUR) Hidden text:
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:
Press %BLLUDARU% at the title screen, then select player and start the game.

Great Tank, Iron Tank

(UNI) Password generator:
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:
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
Greg Norman's Golf Power

(BUR) Hidden text:
There is a hidden copyright text in ROM: "COURSE DESIGNER CONCEPT AND PROGRAM BY SCOTT GUEST 080391".

Guerilla War, Guevara

(GEN) Level and difficulty selection:
Select a one or two player game, then hold A or B and press Start.

(BUR) Hidden text:
RESET routine in this game uses string "KNT" to check if game was soft or hard reset.

(BUR) Hidden text:
There is a hidden texts inside 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...".
Info from Xkeeper

Guardian Legend, The, Guardic Gaiden

(GEN) Sound test:
Hold down A + B then press the Reset button.

(GEN) View game texts:
When you enter the 1st room of the labyrinth right after finishing first action level press Select to enter map mode then press and hold Select again, now by pressing B button you can view all game texts.

(GEN) Secret passwords:
TGL-No action sequences (second quest)

Gun Nac

All versions:

(GEN) Level select:
Enter to "GUN-NAC CONTROL ROOM" mode and set "SOUND" index to "05". Now you can set any level including hidden Level 0.

(UNI) Invulnerability:
Wait until starting cutscene sequence about to end and hold A + B at first controller. Demo sequence will continue with additional graphics and message "DEATH & NON-DEATH FREE SELECT MODE OK!" will appears. From now in "GUN-NAC CONTROL ROOM" will be extra option to set on/off invulnerability.

(UNI) Alternate ending:
After game completion, when first demo sequence about to end, before credits rolls, hold A + B on first controller to view alternate ending sequence instead STAFF. This will enable "Invulnerability" option in configuration menu as well.

(UNI) Quick configuration:
Before Reset hold A + B buttons on first controller.

(BUR) GameGenie:
PENNOYAA-Enable debug mode disabled in final release. You will be able to select any level by default, a lot mode extra configuration options like weapon and bomb type selection, toggle invulnerability. Additionally, you can hold Up then press Start on first controller before "NAXAT SOFT" copyright screen fade out to view ending sequence. In this mode alternate ending sequence cannot be seen.

US version:

(BUR) Hidden text:
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!

Japan version:

(BUR) Hidden text:
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

US version:

(FIX) Extra 9 players:
Highlight "players 3" on the "option" screen. Now you can press any of A, B, Right or Left buttons in any sequence but summary you should press buttons 50 times. With 50th pressing you will hear the sound and number "9" next to "playes" will appears. If you miss 50th pressing, try again one more time carefully. ;)

Japan version:

(UNI) Secret passwords:
HARD-Hard "one-touch" mode
9PLY-Extra 9 players

All versions:

(BUR) Copyrights check:
As most games by Konami made after 1991 year both versions of this game contains copyrights check which tests for CHR copyright data presence, copyright title screen text and code for checking title screen text. If tests fails super hard "one-touch" death mode enabled, you will die even by machine gun bullets. US version of game doing this check, but don't enables protection feature and game continues to work normally.

Gun-Dec, Vice - Project Doom

(FIX) Stage select:
Hold the A button and press the Reset button. Press A on second controller.

(FIX) Sound test:
Hold the A button and press the Reset button. Press B on second controller.

Gun.Smoke

(UNI) Change controls:
Press A, B, B, Right, Right, Right, Left, Left, Left, Left, Up, Up, Up, Up, Up, Down, Down, Down, Down, Down, Down very quick at the title screen, then press Start. You can control fire direction by direction keys, instead A or B or A + B.

(FIX) Machine Gun:
Press A, A, A, A, Select, Select, Select, Select, Right, Right at the title screen, start the game and you'll get Machine Gun with 300 ammo.

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

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

Heavy Barrel

Japan version:

(FIX) Level select:
At title screen hold on second controller one of the following codes then press Start on first controller.
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

Heavy Shreddin'

(FIX) Extra 99 lives and level select:
Hold Left + A + B and press Start at the title screen. Now you will be able to select any level by pressing A and extra 9 lives.

Hector 87, Starship Hector

(BUR) Hidden text:
Some text hidden just next to credits text data: "1987,06,08 COMPLITE OYAMA SAN OTSUKARESAMA BY RURIRURI NAGATA".

(BUR) GameGenie:
GEVYYKGK (Japan version)
GAXYIUGK (US version)		-Enable old level select mode called "SHOOTING GAME HECTOR TEST", just press Reset then choose "HISTORY" by pressing A or B then press Start.

Hi no Tori - Houou Hen - Gaou no Bouken

(UNI) CRC test:
Hold A + B buttons then press Reset. If CRC ok, message "HINOTORI ONE' appears, in other hand "HINOTORI TEN" appears.

Hit the Ice

(UNI) Sound test:
At the title screen after message "PUSH START BUTTON" appears, press A, Up, B, A, Right, B, A, Down, B, A, Left, B.

Hokuto no Ken (J)

(UNI) Reverse controls for Player 2:
Select two players mode. Shout to the microphone on second controller 10 times at title screen, then hold on second controller Down + Left + A + B and press Start on first controller. From now second player's movement controls will be reversed. This cheat only works for Famicom system.

(BUR) Hidden text:
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

(UNI) Reverse controls for Player 2:
Select two players mode. Shout to the microphone on second controller 10 times at title screen, then hold on second controller Down + Left + A + B and press Start on first controller. From now second player's movement controls will be reversed. Note: This cheat only works for Famicom system, in US version all needed code is presented, but there is no microphone on second controller of NES system.

(BUR) Hidden text:
There is some hidden copyright message in ROM: "PRG by Y.Saka & M.Yoshihara / CHR by Ken.S & M.Higa".

(BUR) Hidden text:
RESET routine in this game uses string "MASAHIRO" to check if game was soft or hard reset and in addition test bankswitching with comparing two strings in bank 7 and bank 4. If test fails, game will hang on reset routine.

Home Alone (U)

(UNI) Secret message:
At copyright text screen press on first controller or second controller 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 Run Nighter '90 - The Pennant League

(UNI) Sound test:
Hold A + B at the title screen on second controller.

Honoo no Doukyuuji - Dodge Danpei (J)

(UNI) Secret passwords:
HEBE-Cutscene test mode. You can select one of game cutscenes to play.

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 ending credits at title screen or select destination on map then press B to go there immediately without level completion.

(BUR) Hidden text:
There is a hidden copyright text in ROM: "MUSIC DRIVER V1.0 (C)JONATHAN DUNN & OCEAN SOFTWARE".

Hoshi o Miru Hito

(BUR) Hidden text:
There is a hidden copyright text in ROM: "1987ANOTHERltd.", "1987. Another Ltd.".

Hototogisu

(UNI) Repeat demo sequence:
When at start, title shown at center of the screen and plays music, after two music cycles running out there is demo sequence starts. At end of demo sequence title screen shown agian then some message appears on screen for a couple of seconds. Quickly press Up, Up, Down, Down, Left, Right, Left, Right, B, A on first controller and demo sequence will start again without waiting.

Huang Di

(UNI) Palette roll:
When "ASDER" logo is displaying, hold on first controller Down + Left + B + Select, palette flashing will change. Reason for this is unknown.

(UNI) Extra health:
While in game each time you press Up + B in any combinations with other buttons, internal counter is increasing up to 3 and when you get harmed this counter decreased instead of main lives counter. So, your player can be practically invincible if Up + B will be always pressed.

Hudson Hawk

All versions:

(UNI) Infinite lives:
Press Up, Up, Left, Left, Right, Left, Down, Select, Select at the title screen, screen flashes and sound will confirm correct code entry.
Thanks Kitsune for corrections.

(BUR) Hidden text:
There is a hidden text strings in ROM: "MUSIC DRIVER V1.0 (C)JONATHAN DUNN & OCEAN SOFTWARE".

Japan version:

(BUR) Hidden text:
There is a hidden version text in ROM: 
* HUDSON  HAWK *
* SENT 30/9/91 *
* (TRANS) V2.4 *

(BUR) GameGenie:
AESAYEZE-Exchange text copyright screen with "Sony Imagesoft" logo screen unused in Japan version.
LESAYEZE-Exchange text copyright screen with "Ocean" logo screen unused in Japan version.

European version:

(BUR) Hidden text:
There is a hidden version text in ROM: 
* HUDSON  HAWK *
* SENT 4/10/91 *
*  PAL  V0.1   *

(BUR) GameGenie:
AESEPELE-Exchange "Ocean" logo to "Sony Imagesoft" logo unused in US version.

US version:

(BUR) Hidden text:
There is a hidden version text in ROM: 
* HUDSON  HAWK *
*   28/10/91   *
* NEW STARTUP  *

(BUR) GameGenie:
LESEPEAE-Exchange "Sony Imagesoft" logo to "Ocean" logo unused in US version.

Hudson's Adventure Island (U), Takahashi Meijin no Bouken Shima (J)

(BUR) Hidden text:
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:
Wait until Higgins is hit by the coconut on the title screen. Then, press Right, Left, Right, Left, A, B, A, B.

(BUR) GameGenie:
PPSZXXPE-Enable full featured Debug mode, tests everything in the game.
Info from BMF54123

Hudson's Adventure Island III, Takahashi Meijin no Bouken Shima III

(GEN) Level select:
Press Down, Up, Left, Right, B, A, B, A at the title screen.

Hunt for Red October, The

(GEN) Double points:
Pause game play then press A, B, B, A, Right, Down, Up, Left, Left bottom of screen will turn green. Note: this code may only be enabled once per game.

(FIX) All weapons:
Pause game play then press A, B, Select, A, B, Select, A, B, Select, A, B, Select, A, B, Select, A, B, B, A bottom of screen will turn green. Note: this code may only be enabled once per game.

(GEN) Level skip:
Pause game play and press A, B, Select, Right, Left, Left, Right, Select, B, A, B, B, A. Level skips immediately. Note: this code may only be enabled once per game.

(UNI) Invulnerability:
Pause game play then 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 bottom of screen will turn green. Note: this code may only be enabled once per game.

(GEN) Instant stopping:
Pause game play then press Up, Down, Left, Right, Select bottom of screen will turn green. This cheat triggers on/off each time you enter it.

(GEN) Slow automatic scrolling:
Pause game play then press Up, Down, Left, Right, Up, Down, Left, Right, Up, Down, Left, Right, A, B, B, A bottom of screen will turn green. This cheat triggers on/off each time you enter it.

(GEN) Disable automatic scrolling:
Pause game play then press Up, Up, Down, Down, Left, Left, Right, Right bottom of screen will turn green. This cheat triggers on/off each time you enter it.

(UNI) Unknown:
Pause game play then press Select bottom of screen will turn green. Note: this code may only be enabled once per game.

(BUR) GameGenie:
Cheat modes disabled in final release, just enable one code at one time and use "Select" cheat.
TEVLVKUG-Add extra life.
ANVLVKUG-Extra 99 lives.

Hydlide (U), Hydlide Special

Normal version:

(BUR) Hidden text:
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:
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:
Complete game once. Do not start new game, select "CONTINUE" from title menu and return to Hidden Village on the Cemetery South-East (you should be at least 7th level or should have INTELLECT at least 50th level to open hidden passage). Just step before grave in 5th column from left, 2nd row from bottom. When entering Hidden Village head to the west, then enter CHURCH (or HANGAR) to the left from INN. Menu with music titles appears. Press any button to cycle throught compositions, press B to exit.

Hyper Olympic, Track & Field (U), Track & Field in Barcelona

(BUR) Hidden text:
There is hidden version text inside ROM: "RC800 1,0 850325" for "Hyper Olympic" version, "RC800 X,0 850919" for "Hyper Olympic Genteiban!" version, "RD001 1,0 861220" for US version.

Hyper Sports

(BUR) Hidden text:
There is a hidden version text inside ROM: "RC806 1,0 850601s".

Ikari (J), Ikari Warriors

(GEN) Continue:
Press A, B, B, A at the game over screen after losing during one of the first three levels of the game. This also can be done on second controller at any time for a second player to enter the game.

(FIX) Level select:
At 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. Level select menu appears after airplane landing.

Ikari II - Dogosoken, Ikari Warriors II - Victory Road

(FIX) Continue:
Press A, B, B, A, A, A, A, A, A, B after losing game, but before game over screen appears. Note: this also can be done on second controller 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.

Ikari III - The Rescue, Ikari III (J)

(GEN) Continue:
Start a two player game. Hold Up + Right + A on first controller after player one loses the game to continue.

(BUR) Hidden text:
RESET routine in this game uses string "KISS" to check if game was soft or hard reset.

Image Fight

(FIX) Level select:
At the title screen hold A + B on both controllers and just 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 (E), Indiana Jones and the Last Crusade (U) (UBI Soft)

(UNI) Password generator:
Level:
Score:
Whip:
Gun:
Random1:
Random2:
Password:

Indiana Jones and the Last Crusade (U) (Taito)

(BUR) GameGenie:
ZKVPENUY-This GG code enables development stage funny debug feature. There is some memory area that contain some critical game variables. For some reason game calculates simple checkum for this area and then compares it with previously calculated value. In final release wrong CRC cause to rewrite some wars to 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 jumps to 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 old camera behaviour returned: it will move accordingly to d-pad buttons is presset - up, down, left or right. In final release there is only automatic left to right camera movements.

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:
Enter to "OPTION MODE" menu, move cursor to "EXIT" option then press Right 35 times and after that Left one time. Message "PRGD. BY JYOJI HIRAYAMA" will appear.

(UNI) Level select and no hit mode:
Enter to "OPTION MODE" menu, move cursor to "EXIT" option then press Right, Left. At "BOY/GIRL" select menu press Up to select level and Down to change "HIT/NOT" mode with normal lives or invincibility accordingly.

International Cricket

(UNI) Sound test:
After power on, when copyright screen is displayed press and hold A + Select + Start on second controller. You need holding these buttons all time while copyrights is displayed or not much less. Then Sound test mode will appear.

(UNI) Secret message:
Enter "Sound test" mode as described above. Play any "Sample" (25-29). Select "Off" (0) then press Select, Select, Select on second controller. Message "SUE ANDERSON: A GURU FOR THE NINTIES" appears.

(UNI) The Beam team:
Enter "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:
Enter "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 title screen hold Up both on controllers one and two then press Start on first controller.

(UNI) Bonus chance cheat:
At title screen hold Up + B + Select then press Start on first controller. You can play in bonus chance game at any shop without loosing. Now you have 40 tries with fixed behavior. Skull will fall into cups in that order: 1, 4, 3, 2, 1, 4, 3, 2, 1... and so on. So you can win 12000 gold.

Isolated Warrior, Max Warrior - Wakusei Kaigenrei

(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:
A 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:
A title screen hold A then press Start. You will be able to manage Turbo File devise to save and load progress.

(BUR) Hidden text:
There is some hidden copyright text in ROM: "Prog. By FukashiCreamSoft.".

Ivan Ironman Stewart's Super Off-Road, Super Off-Road

(BUR) Hidden text:
There is some hidden copyright text in ROM: "* Conversion by Paul Machacek for RARE LTD *".

Jackie Chan (J), Jackie Chan's Action Kung Fu

(FIX) Level select:
Press Up, Up, Down, Down, Up, Down, B, A at the title screen, then simply press Start.

(FIX) Extra 99 continue:
Press B button once on second controller while in Level Select mode.

James Bond Jr

(FIX) Secret passwords:
012345-Sound Test
888888-View credits
181287-Grenades, unlimited time, ammo and extra 99 lives
170167-Grenades, Glow, unlimited time and ammo
200888-Grenades, unlimited time and ammo

(BUR) Hidden text:
There is some hidden copyright text in ROM: "(C) COPYRIGHT 1990/91/92 EUROCOM ENTERTAINMENT".

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.

Jesus - Kyoufu no Bio Monster

(UNI) Secret passwords:
ふあみこん　せいさくの　なかまたち　みせてくれ-Secret staff message. First normal staff rolls appears, after it secret staff rolls 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.
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 button at title screen. CHRSET don't work, because using missing code parts at address 0x6000 that game in final release didn't using.
Info from BMF54123

Japan version:

(BUR) GameGnie:
UXXOPOKK-Enables Level select screen after pressing Start button at title screen. CHRSET don't work, because using missing code parts at address 0x6000 that game in final release didn't using.

Jigoku Gokuraku Maru, Kabuki - Quantum Fighter

(GEN) Level select:
Press on second controller at the title screen A 8 times, B 4 times, Right 16 times. Message "ROUND 1 START" will appear. Change level by pressing Up or Down on first controller.
Info from BMF54123

Jimmy Connor's Tennis

US version:

(BUR) Hidden text:
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:
PAL Version
Jimmy Connors Tennis for the N.E.S.
Built Wednesday 17th February 1993.
(c) Copyright UBI Soft 1993.

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.
Info from Chris Covell
TEXINTIA-Additionally enables final boss selection at stage select screen.
Info from Chris Covell

Joust

(BUR) Hidden text:
RESET routine in this game uses string "MIYA AOKI" to check if game was soft or hard reset.

Jovial Race

(UNI) Extra 29 lives:
When first title screen appears after two car crashes press A, B, Up, Down, Up, Down, B, A then press any other button except A or Start then start the game.

JuJu Densetsu, Toki

(BUR) GameGenie:
PEKYVYAA-Enables debug mode. Invulnerability is enabled, level select is enabled. To select level press A on player select menu.

Jungle Book, The

(GEN) Cheat mode:
At title screen press Select to display the options screen. Select the sound test option, then play songs in following order: 40, 30, 20, 19, 18, 17, 16, 15.

Jurassic Park

(FIX) Level Skip:
At title screen press Down, Right, Left, Down, Right, Left, Down, Right, Left, Down, Right, Left. A sound will confirm correct code entry. Pause game any time and press Select to skip level.

(BUR) Hidden text:
There is a hidden copyright text in ROM: "MUSIC DRIVER V1.0 (C)JONATHAN DUNN & OCEAN SOFTWARE".

Juuryoku Soukou Metal Storm, Metal Storm

US version:

(BUR) GameGenie:
SNKEPULO+OOKEZLVP-Enables disabled in US release intro movie.
Info from BMF54123
YASNUKZA-Enables a level and powerup select mode.
Info from BMF54123

Kage no Densetsu, Legend of Kage, The

(FIX) Ten lives:
Hold A + B + Select + Start on first controller and A + B on second controller then press Reset. Release buttons when title screen starts rolling from bottom of the screen and while it scrolling, press at the same time A button on first controller and B on second controller. When you start the game you will have extra 10 lives.

Kagerou Densetsu

(BUR) GameGenie:
EAKNGLEY-Unknown internal test, you should hold Up + Down + Left + Right on second controller and press Reset, screen will be blue, then press A button, programm tests for 0x7F80==0x55, 0x7FFF==0xAA and all data between these addressess are zero. So game will flash with green screen and working fine, if not, screen will be red and game freezes.
This GG code allow you to enter cheat combination Right instead to get this code working.

Kaiketsu Yanchamaru (J), Kid Niki - Radical Ninja

(FIX) Extra live:
Every time you kill a boss, a scroll appears. If you hit this scroll when number of seconds is divided on 12 then scroll will turn into extra live.

(GEN) Secret stage:
At Stage 5 stand by the left hand from Buddha statue then shout in famicom's microphone at second controller.

Kaiketsu Yanchamaru 2 - Karakuri Land

(UNI) Sound test:
At main title screen press B + Select.

Kame no Ongaeshi - Urashima Densetsu, Xexyz

(GEN) Secret passwords:
BBA13 57912-Play Bosses on hovercrafts
A2A4A 6A8A0-Play Bosses without hovercrafts

Karate Champ

(BUR) Disabled cheat:
There is some old cheat left in final version. When title appears from bottom of screen and before it stop scrolling 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 cheat and increase counter at title screen rolls. In 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. 0x50, 0x51 vars are counter in decimal notation, 0x4F main cheat flag, 0x53-0x5C sequence check area, 0x52 - sequence length variable. 0xAD-0xB6 - sequence store area, 0xAC - sequence length var (uninitialized by default, may be any index in zero memory).

Karnov

(GEN) Level select:
Hold Right + A + B + Select on first controller, then press A on second controller once for each level to be skipped. Finally, press Start on first controller to begin game play. Note: This may only be done up to level 9.

(GEN) Suicide:
Press A + B on second controller during game play.

(GEN) Continue:
Hold Select and press Start when "Jesus" stops talking at game over screen, Note: This may only be done three times.

Kero Kero Keroppi no Daibouken (J)

(BUR) Hidden text:
There is some copyright text inside ROM: "T.Ueno&F.Omorita".

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 button at Spell selecting screen.

Kickle Cubicle, Meikyuu Shima

(GEN) Kid Niki:
Hold A on second controller at title screen, until Kid Niki appears.

(GEN) Sound test:
Hold A + B on second controller and press Reset.

(GEN) Preview first Boss:
Hold Down and press Reset. Press Up on second controller after the screen turns white.

Kid Klown, Mickey Mouse 3 - Yume Fuusen

(GEN) Hard mode:
At the title screen press Up, Up, Down, Down, Left, Right, Left, Right, B, A.

King Kong 2 - Ikari no Megaton Punch

(UNI) Level select:
Press Right, Left, Right, Left, B, A, Up, Down, Up, Down at the title screen and then press any other button before pressing Start. During the game you can press A button on second controller to switch level or B button to hold a game.

(UNI) CRC test:
Hold A + B button then press Reset. "KINGKONG" string stands for PRG ROM checking, "KONAMI" string stands for CHR ROM checking. "ONE" means test OK, "TEN" means test fails.

King of Fighters 96

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

King of Kings (J)

(UNI) Secret words:
At 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 second controller. Name of save record will be now "ILOVEYOU".

Kinnikuman - Muscle Tag Match, M.U.S.C.L.E.

(UNI) Stage select:
At wrestler selection screen hold A + B on second controller then press simultaneously Up or Down on second controller and B on first controller to increase or decrease stage number accordingly. Press Start to start game in selected Stage.

Klash Ball

(UNI) Sound tester:
At title screen, when message "push start button" appears, press on second controller Right + B and at the same time press Down + A + B + Start on first controller.

(UNI) Sound test:
Hold Right on second controller then press Reset. "Makinota show" screen will appear.

Knight Rider

(FIX) Level select:
Hold B, press Reset, release both buttons, then at briefing screen with Devon you will be able to select the starting level. Press Start to begin game play.

(GEN) Ending sequence:
Hold Select then press Reset.

(GEN) Boss battle and Weapon select:
Press Start to pause game play. Then, hold Up + Left + A + B and press Select to change weapons. Press Start to resume game play at the Boss of the current level.

Koushien

(UNI) Secret team:
Hold A button on first controller then press Reset. While demo cutscene rolls, before title screen appears, press Up, Up, Down, Down, Left, Right, Left, Right, B, A on first controller. Select one or two player mode, for first player 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) In-game reset:
Press A + B + Select + Start to return to the title screen.

(GEN) Level select:
Start a game, then once the kreatures start filling the screen, press Start to pause the game. While the game is paused, hold the A button and press Select 10 times. Now lose the game on purpose and when you go back to the options screen at the beginning, you will be able to select from 24.

(BUR) GameGenie:
KEOXYOUE-Enables joypad hint at name entering screen for the hi-score table.

Krion Conquest, The, Magical Doropie

Japan version:

(UNI) Extra character 1:
At title screen press on second controller Up, Down, Up, Down, Left, Right then hold Select and press Start on first controller. After game starts main player character will change to male character.

(UNI) Extra character 2:
At title screen press on second controller Up, Up, Down, Down, Left, Right, Left, Right, A, B, A, B then hold Select and press Start on first controller. After game starts main player character will change to male character.

(UNI) Level select:
At title screen press on second controller Up, Down, Up, Down, Left, Right then hold Select and press A on first controller. Press Up or Down buttons 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.b
(UNI) Invulnerability:
At title screen press on second controller Up, Up, Down, Down, Left, Right, Left, Right, A, B, A, B then hold Select and press A on first controller.

Kujaku Ou 2

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

(BUR) GameGenie:
KUKKTALX+OOKKYEEZ-Exchange standart "sound test" mode with disabled in final release "cheat menu".
Just use cheat for entering "sound test".

Kung-Fu Heroes, Super Chinese (J)

(FIX) Continue:
To continue game after game over hold A then press Start at title screen.

Kunio Kun no Nekketsu Soccer League

(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.

Kyonshiizu 2

(UNI) Extra 100000 money:
At the game beginning, from starting point make 3 steps to south and stand under gate's roof. Then press Start to pause game and press Select, world color will change to red. Now press at the same time Down + A + B on second controller. Unpause the game and enter back to temple. If you did right, Otera give to you 100000 money.

Kyuukyoku Harikiri Koushien

(UNI) Options menu:
At main game menu select last option. In new menu point cursor to last option again and press Select.

(BUR) GameGenie:
AAXTEOYE-Enables CRC test.
Hold Up button on second controller then press Reset. Game perform self-testing for PRG, CHR CRCs and SRAM test.

Kyuukyoku Harikiri Stadium 3

(UNI) Field madness:
When right-handed catcher gets DEADBALL from pitcher quickly hold Up + A + B on first controller. Team gets mad and going to FIGHT!

Kyuukyoku Tiger, Twin Cobra

Japan version:

(UNI) Unlockable:
When "the end" message appears on screen after credits, message "Your password is KTTAISONMAI89PRTN23Y" appears. There is no any password entering mode in FC nor in GEN or PCE versions. Password meaning is unknown. English version haven't any staff messages displayed nor "password" message too. But all contaied in ROM data.

Lagrange Point

(GEN) Sound test:
Press and hold A + B then press Reset.

Last Ninja, The

(UNI) Cheat mode:
Start new game, get the key from garden gate, go outside and find shuriken weapon, return to garden gate, open it and go to next location with river and floating boat. Stand at the left corner of square between bush and bench, turn face to leftmost tree at this location, switch weapon to shurikens and throw them into same direction. When 1 shuriken left a sound will confirm trigger switching. Then you should jump into river and die 6 times, so keep all your lives before this place! After "Game Over" screen you'll see message "Isn't that lucky? You've got CHEAT POWER". Now start new game again and follow instructions.

Legend of Prince Valiant, The

(UNI) Invulnerability:
Press Select, Up, Left, Right, Down, Left at the title screen, screen flashes b/w.
Thanks Kitsune for corrections.

(BUR) Hidden text:
Game contains hidden text block: 
****************
* P.VALIANT V7 *
*      PAL     *
*   01/09/92   *
****************

(BUR) GameGenie:
ESNOVAEY-Enable language select before title screen. English, Deutch, Franciais languages are available.

Legend of the Ghost Lion, White Lion Densetsu

US version:

(BUR) Disabled cheat:
Another disabled "Konami" cheat (Up, Up, Down, Down, Left, Right, Left, Right, B, A) used to be in some game menus, play sound after entering and display some extra menus, but seem to be haven't any effects to any variable. Japanese version of a game havent any traces of this cheat.

Legend of Zelda, The, Zelda no Densetsu 1 - The Hyrule Fantasy

(GEN) Save screen:
While game hold on second controller Up + A then press Start on first controller.

(GEN) Secret words:
Enter as player name:
ZELDA-Second quest

Lethal Weapon

(BUR) Hidden text:
ROM contain hidden text unused in any part of game: "version 0.8 5/12/92 eurocom developments ltd.".

Lethal Weapon (Tw)

(UNI) Invulnerability:
Hold Up + Left + A + B + Select at title screen. A sound will confirm correct code entry.

Lifeforce, Salamander

Japan version:

(FIX) Extra 30 lives:
Press Up, Up, Down, Down, B, A at the title screen.

US version:

(FIX) Extra 10 lives:
Press Up, Up, Down, Down, B, A at the title screen.

Linus Spacehead's Cosmic Crusade

(UNI) In-game reset:
Hold A + B then press Select + Start.

(BUR) GameGenie:
Absolutely all games by Codemasters have internal PRG ROM and CHR RAM testing routines. They called "Smiley tests". Tests are normally enabled, but for triggering it needs pressing all D-pad buttons. For performing PRG ROM test it needs to hold Up + Down + Left + Right + A + Select + Start. For performing CHR RAM test it needs to hold Up + Down + Left + Right + B + Select + Start. Without controller modification it is impossible. GameGenie codes allows you to do not use D-pad buttons for triggering cheat, only A + Select + Start and B + Select + Start. But it affects on ROM's CRC. I ran these tests normally by cheating with debugger, so I wrote normal CRC tests results in brackets.
ELELIONL-PRG CRC test (test ok)
AYOUPOYY-CHR RAM test

Lion King III, The - Simon and Pumba

(BUR) Hidden text:
There is some hidden copyright text inside ROM: "Create by:Tomsoft Studio.E-mail:tomsoft@ihw.com.cn.".

Lion King, The (E)

(GEN) Level Select:
On Options menu hold A + B.

(GEN) Stage Skip:
Pause the game and push B, A, Right, Down to skip to the next stage.

Little Mermaid - Ningyo Hime, Little Mermaid, The

(UNI) No damage:
At title screen hold Right + A + B on second controller then press Start on first controller. Select "no damage" to get invulnerable.

Little Nemo - The Dream Master, Nemo - Pajama Hero

(GEN) Level select:
Press Up, Select, Left, Right, A, A, B at the title screen. New 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

US version:

(FIX) Secret passwords:
SOUND-Sound test
FULL-Full equip at start
ENDING-Ending sequence

Japan version:

(UNI) Secret passwords:
きいてくれよ-Sound test
ふるそうび-Full equip at start
さいご-Ending sequence

Little Samson, Seirei Densetsu Lickle

All versions:

(UNI) Restore energy:
At very end of the game on Normal mode when dark castle arrived, on screen with castle image and flashing lightings press Up, Down, Up, Down, Right, Left, Right, Left, A, B, A, B. Nothing seems happened. Just start game and play.

Japan version:

(GEN) Secret passwords:
*BUG PASSWORD* means this pass not meant to be existed even as secret, code replaced by $FF as dummy, wrong password but programm ignores hi bits and uses only 5 low, so we have symbol $1F there, the same as "5". There is more than one "dummy" passwords in table, but matches always very first.
4WHB-Stage 1: Ruins (Easy)
1SEK-Stage 1: Ruins (Normal)
AK5O-Stage 2: Sky (Easy)
HH1A-Stage 2: Sky (Normal)
ABRN-Stage 3: Waterfall (Easy)
QZ4X-Stage 3: Waterfall (Normal)
ZGOM-Stage 4a: Mushroom Cave (Easy)
SONN-Stage 4a: Mushroom Cave (Normal)
KO0H-Stage 5: Forest (Easy)
TRY5-Stage 5: Forest (Normal)
YNC1-Stage 6: Swamp (Easy)
DRRD-Stage 6: Swamp (Normal)
VKRA-Stage 7: Bubble Cave (Easy)
XJPP-Stage 7: Bubble Cave (Normal)
LFB5-Stage 8: Mountain Base (Easy)
SAMM-Stage 8: Mountain Base (Normal)
QJ2Y-Stage 9: Ice Palace (Easy)
C0FI-Stage 9: Ice Palace (Normal)
BITP-Stage 11: Volcano (Easy)
ERIF-Stage 11: Volcano (Normal)
MIST-Stage 10: Temple (Easy)
4WDH-Stage 10: Temple (Normal)
G0W4-Stage 12: Dark Mountain (Easy)
B3WH-Stage 12: Dark Mountain (Normal)
CLUX-Stage 13: North Castle (Easy)
ELIF-Stage 13: North Castle (Normal)
5555-Stage 14: Floating Castle part 1 (Easy) *BUG PASSWORD*
GN0L-Stage 14: Floating Castle part 1 (Normal)
AK1T-Stage 15: Floating Castle part 2 (Normal)
UTT0-Stage 16: Floating Castle part 3 (Normal)
43JR-Stage 17: Floating Castle part 4 (Normal)
YUK0-Stage 13 Boss+max health & potions (Easy)
2KAS-Stage 13 Boss+max health & potions (Normal)
KUMA-Stage 16 Boss+max health & potions (Normal)
YUK1-Stage 1: Ruins+max health & potions (Easy)
H1R0-Stage 1: Ruins+max health & potions (Normal)
KAZU-Music room

US version:

(GEN) Secret passwords:
*BUG PASSWORD* means this pass not meant to be existed even as secret, code replaced by $FF as dummy, wrong password but programm ignores hi bits and uses only 5 low, so we have symbol $1F there, the same as "&". There is more than one "dummy" passwords in table, but matches always very first.
?2KC-Stage 1: Ruins (Easy)
7XGN-Stage 1: Ruins (Normal)
BN&S-Stage 2: Sky (Easy)
KK7B-Stage 2: Sky (Normal)
BCWR-Stage 3: Waterfall (Easy)
V5?3-Stage 3: Waterfall (Normal)
5JSQ-Stage 4a: Mushroom Cave (Easy)
XSRR-Stage 4a: Mushroom Cave (Normal)
NS6K-Stage 5: Forest (Easy)
ZW4&-Stage 5: Forest (Normal)
4RD7-Stage 6: Swamp (Easy)
FWWF-Stage 6: Swamp (Normal)
1NWB-Stage 7: Bubble Cave (Easy)
3MTT-Stage 7: Bubble Cave (Normal)
PHC&-Stage 8: Mountain Base (Easy)
XBQQ-Stage 8: Mountain Base (Normal)
VM84-Stage 9: Ice Palace (Easy)
D6HL-Stage 9: Ice Palace (Normal)
QLXZ-Stage 10: Temple (Easy)
?2FK-Stage 10: Temple (Normal)
CLZT-Stage 11: Volcano (Easy)
GWLH-Stage 11: Volcano (Normal)
J62?-Stage 12: Dark Mountain (Easy)
C92K-Stage 12: Dark Mountain (Normal)
DP03-Stage 13: North Castle (Easy)
GPLH-Stage 13: North Castle (Normal)
$$$$-Stage 14: Floating Castle part 1 (Easy) *BUG PASSWORD*
JR6P-Stage 14: Floating Castle part 1 (Normal)
BN7Z-Stage 15: Floating Castle part 2 (Normal)
0ZZ6-Stage 16: Floating Castle part 3 (Normal)
?9MW-Stage 17: Floating Castle part 4 (Normal)
40N6-Stage 13 Boss+max health & potions (Easy)
8NBX-Stage 13 Boss+max health & potions (Normal)
N0QB-Stage 16 Boss+max health & potions (Normal)
40N7-Stage 1: Ruins+max health & potions (Easy)
K7W6-Stage 1: Ruins+max health & potions (Normal)
NB50-Music room

Locksmith

(UNI) Secret copyright:
At title screen press A, B, B, Select, A, B, Select, B, A, Select. Secret screen with copyrights will appear.

Lode Runner

(FIX) Level select:
Any time in game or at level and score info screen press Select then press A or B to select level then press Start.

(FIX) Game speed:
At level select screen hold Select then press A to increase speed or B to decreage sped of game then press Start to play corresponding level with corresponding speed. Note: default speed delay is 35, pressinf A button you decreasing it or increasing be pressing B to 1. Speed delay value wrapped from 255 to 0, so if you press A 35 times you'll get maximum game speed, but if you press A one more time, you'll get maximum delay, and sowest game speed. The same in reverse will happen if you press B 221 times.

Lost Word of Jenny

(UNI) All keys:
Press Start at title screen and wait before pumpkin carriage stops in center of screen, right after that press once Select button then enter following combination: Down, Right, B, Left, Right, A, Up, Down, A, Left, Up, B. After game starts you will have all keys.

Low G Man

(FIX) Secret passwords:
Complete list of secret and generic passwords.
matt-1-2
hnry-1-3
mich-2-1
danm-2-2
jimg-2-3
elle-
malz-
hisa-
etsu-
isac-
kuni-
kawa-
bill-
ishi-
aman-
ino♥-Bonus Level
shio-Bonus Level
naka-3-0
gata-Bonus Level
kid♥-Ending
teru-
mie♥-
kado-
same-
irie-
maru-
sima-
higu-
ogaw-
iizu-
shot-Full weapons and ammo
lobb-9 lives
song-Sound test
say♥-Ending
yes♥-Ending

Lunar Ball

(BUR) Hidden text:
RESET routine in this game uses string "JEMINI DAZO!!" to check if game was soft or hard reset.

Lupin Sansei - Pandora no Isan

(UNI) Warp to Level 2:
Press Up, Down, Left, Right, B, A at the title screen.

(UNI) Warp to Level 3:
Press Left, Right, Up, Down, A, B at the title screen.

(UNI) Warp to Level 4:
Press Down, Up, Right, Left, A, A at the title screen.

(BUR) Hidden text:
RESET routine in this game uses string "Yoshikawa" to check if game was soft or hard reset. Also game contain some hidden copyright text at end of file: "Copyright 1987 Namco Ltd. All Rights Reserved Programmed By.. 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 this string partially used as test data.

(BUR) GameGenie:
GAXYNTEI-At reset game performs some manipulations with expansion port sending and reading some data sequence to it then compare resulting data with original. Probably there is some special device for testing purposes only. With this code you may pass device checking and see CRC test itself. If data matches, game performs partial (one from each 15 bytes) data CRC tests. While checking PRG data display color is red and if check fails display will remain red and game stops. While checking CHR data display color is green and if check fails display will be flashing from red to green infinitely. GoodNES version ROM pass this check normally.

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 Candle, The

(UNI) Sound test:
Hold Up + Right + A + B on second controller and Up + Right + A + B + Select + Start on first controller then press Reset. Use Left or Right on first controller to select music and Left or Right on second controller to select sounds.

Magic Darts

(UNI) Program version:
Hold Select button at "SELECT YOUR GAME!" menu until message "VERSION 01.02" appears.

(UNI) Secret message:
Hold on A + B buttons at the title screen, press Start to enter "SELECT YOUR GAME!" menu then hold Select until message "BY K1 NAKANISHI" appears.

(BUR) Sound debugger:
There was "FAMICOM SOUND DEBUGER" mode at development stage in this game similar to one from "Silva Saga" game. But instead of it this debugger code wasnt much broken but still haven't any crossrefrences from 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 John (J), Totally Rad

(GEN) Credits:
At the title screen press Left, Left, Right, Up, Down, Down, Up on second controller then press Start on first controller.

(GEN) Level select and Sound test:
At the title screen press Up, Down, Down, Left, Left, Right, Right, Start on first controller.

Magic Johnson's Fast Break

(BUR) Hidden text:
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

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 (sound test)
HUHUMIHUHU-Who's Who (game credits)

Majaventure - Mahjong Senki

(UNI) Cheat menu:
Press Select at title screen to select "continue" mode. Then hold Up + Select buttons and press Start to enter stage select menu. Hold Select button again and press Start button to enter boss select menu, and finally hold Select button then press Start to enter to sound test menu.

Major League Baseball

(GEN) Special team selection:
Hold Down + Left + A + B + Select and press Start at the title screen. Use the "1 Player Set" and "2 Player Set" options that appear on the next screen to select a team.

Majou Densetsu 2 - Daimashikyou Galious

(UNI) Password generator:
Note: bytes 0x00, 0x04, 0x10 are decimal numbers, each octet not greater than 9.
Random:
Password:
Password:

Maniac Mansion (J)

(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 Kids

(UNI) Sound test:
This game have very strange cheat enabling procedure. While title screen awaits pressing any button before starting demo sequence, holding some buttons increase internal counters which will compare with some values after starting a game. Counters are 8-bit values that cycles repeatedly from 00 to FF. Each cycle takes up about 8 seconds. For enabling cheat you should hold corresponding buttons for some seconds each in any order.
There is 4 counters and 4 buttons to hold. First one is button A on second controller, needed counter value is between B4..F0. Second one is B button on the same second controller, needed counter value between 3C..78. The rest buttons is on first controller. This is Select button, value between 78..B4. And finally B button, value between 5A..78.
For enabling Sound test mode you need hold on second controller A button about 5-7 seconds, B button about 3-4 seconds and Select on the first controller about 4-5 seconds then press Start on first controller.

(UNI) Extra 20 lives:
As described above you shold hold B button on the first controller at title screen about 3-4 seconds then start the game.

Mappy-Land

Japan version:

(UNI) Stage select:
Press Up, A, Down, B, Left, A, Right, A, Select + Start at the title screen.

Master Fighter 2, Street Fighter II (YOKO)

All versions:

(UNI) Zangief ending sequence:
Press B, A, A, A, Left, Right at the title screen, then press Start.

(UNI) Zangief VS. Vega:
Press B, A, A, A, Down, Down at the title screen, then press Start.

YOKO version:

(UNI) Unlimited health bar:
Press Left, Left, B, A, A, Left at the title screen.
Thanks Kitsune for corrections.

Mega Man 2, Rockman 2 - Dr. Wily no Nazo

(FIX) Turn Stars Into Birds:
At the Stage select screen, hold down the A button 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!

(GEN) Freeze enemies:
On second controller push and hold Up + A, this does not work on all enemies, but it does work on almost all bosses.

Mega Man 5, Rockman 5 - Blues no Wana!

US version:

(BUR) GameGenie:
ATUKGUOZ-Enables ingame debug mode. Press Left on second controller to pause/unpause the game. Press Up on second controller to pass through obstacles. Press Right on second controller to restore your energy and edit the palette. Use first controller to change the palette. Press Select on first controller to exit the edit mode and have your energy restored.
Info from GSHI

Mega Man 6, Mega Man 7, Rockman 6 - Shijou Saidai no Tatakai!!, Rockman 7

US version:

(BUR) GameGenie:
EZKKIVKG+GTVKATOL+AXEGLVTU-Enables debug mode. Use controller to view sprites data, change palette and listen all ingame music and sounds in sound test.
Info from GSHI

Meiji Ishin

(UNI) Something like quiz:
Press Up, A, B, Left, A, A, A, A, B, Right, B, A, Down, B, B, A + B at the title screen, second controller.

Meimon! Takonishi Ouendan - Kouha 6 Nin Shuu

(UNI) Sound test:
At very first briefing screen after selecting game mode (start new or contnue) and before map screen appears hold A + B + Select + Start buttons.

(UNI) Invulnerability:
At map screen select and enter "パスワード" option where is your current password is displaying then press Up, Up, Down, Down, Left, Right, Left, Right, B, A. A sound will confirm correct code entry. If you enter code twice cheat is disabled but you can enable it any time.

(UNI) Credits:
After game completion at "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

(UNI) Sound test:
Press A button at title screen 20 times.

(BUR) Hidden text:
There is a hidden copyright text in ROM: "1987. Another Ltd.".

Menace Beach

(UNI) Unknown:
At the title screen press buttons Left, Select, Left, Left, Left, Left, Left, Left, Up, Up, Up, Up, Up, Up, Right, Right, Right, Right, Right, Right. When you pressed correct button, white color changes to red. After entering code you'll hear the sound. Then press B button and message "YOU BIG CHEATERHEAD!" appears.

Mendel Palace, Quinty

(GEN) Bonus levels:
Hold Select + Start and press Reset.

Metal Fighter

(GEN) Level select:
Press Select at the title screen a number of times one less than that of the desired starting level then press Start.

(UNI) Extra 5 lives:
At title screen press Down, A, Up, A then press any other button or Reset.
Info from Яковлев Виктор

Metal Max

(BUR) Hidden text:
here is some hidden text in ROM: "Program: FX-702P".

Metroid

(GEN) Secret passwords:
NARPAS SWORD0 000000 000000-Invincibility and Infinite Missiles

Mezase Pachi Pro - Pachio Kun

(BUR) Hidden text:
There is some hidden text inside 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".

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

(BUR) GameGenie:
Absolutely all games by Codemasters have internal PRG ROM and CHR RAM testing routines. They called "Smiley tests". Tests are normally enabled, but for triggering it needs pressing all D-pad buttons. For performing PRG ROM test it needs to hold Up + Down + Left + Right + A + Select + Start. For performing CHR RAM test it needs to hold Up + Down + Left + Right + B + Select + Start. Without controller modification it is impossible. GameGenie codes allows you to do not use D-pad buttons for triggering cheat, only A + Select + Start and B + Select + Start. But it affects on ROM's CRC. I ran these tests normally by cheating with debugger, so I wrote normal CRC tests results in brackets.
EUULXSNL-PRG CRC test (test ok)
ANKLVSYY-CHR RAM test

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 (J), Mickey Mousecapade

(GEN) Continue:
When the game over message appears, hold Up + A + B and press Start.

(GEN) Level warp:
On the title screen, hold the Select button and press:
Up-Castle stage
Right-Ocean stage
Down-Pirate stage
Left-Woods stage

Micro Machines

All versions:

(GEN) Always qualify:
Complete the qualifying race, then hold Up + B + Select until the screen changes color. Then, press Start. The phrase "Qualify - 6 Lives" will appear to confirm correct code entry.

US version:

(BUR) GameGenie:
Absolutely all games by Codemasters have internal PRG ROM and CHR RAM testing routines. They called "Smiley tests". Tests are normally enabled, but for triggering it needs pressing all D-pad buttons. For performing PRG ROM test it needs to hold Up + Down + Left + Right + A + Select + Start. For performing CHR RAM test it needs to hold Up + Down + Left + Right + B + Select + Start. Without controller modification it is impossible. GameGenie codes allows you to do not use D-pad buttons for triggering cheat, only A + Select + Start and B + Select + Start. But it affects on ROM's CRC. I ran these tests normally by cheating with debugger, so I wrote normal CRC tests results in brackets.
ELSLGONL-PRG CRC test (test fails)
AYVUAOYY-CHR RAM test

Aladdin version:

(BUR) GameGenie:
ELEUPXNL-PRG CRC test (test ok)
AYOUIXYY-CHR RAM test

Mike Tyson's Punch-Out!!, Punch-Out!!

(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".
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.

Minelvaton Saga

(UNI) Fast moving:
At title screen press Up, Up, Down, Left, A, Left, Right, Down, Down, B, press Start and title screen will change color to black. From now press Start in game to enable and Select to disable fast moving (maybe there is much more effects just now unknown).

Mirai Shinwa Jarvas

(UNI) Teleport to start:
In game press on second controller Up, Up, Down, Down, A, B, A, B and you will be returned back to starting point.

Mission Impossible

(UNI) Secret passwords:
LRHN-Level 1
KMVW-Level 2
XDGJ-Level 3
QBYZ-Level 4
HMPR-Level 5
TVJL-Level 6
YGKX-Computer level
MTKN-Computer password

Mitsume ga Tooru

(UNI) Debug menu:
At the title screen hold A + B buttons on second controller, simultaneously on first controller hold Select and then press Start.

(UNI) Level select:
At the title screen hold A + B buttons on second controller, press on first controller A, A, A, A, B, B, B, B, A, B, A, B, A, B, A, B.
Info from Яковлев Виктор

Mobile Suit Z Gundam - Hot Scramble

(UNI) Debug monitor:
At title screen on second controller 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, message "MONITOR ON" appears instead of hi-scores but only if title screen is renewed after showing again after 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 first controller or buttons on second controller, with Select on first controller you can advance game by frame by frame.

Momotarou Densetsu (J)

(BUR) GameGenie:
There is two cheat options seems to be disabled in final version, they should be entered via secret players names, but seems to be now it is impossible to write these names correctly. So, you can enter this GameGenie codes to enable two of them before entering main game mode.
EUEXOZEP-Sound test
EUOZUZEP-Picture test

Momotarou Dentetsu

(UNI) Secret passwords:
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

Monster In My Pocket

(UNI) Skip copyrights:
When copyright screen appears, hold A + B + Select and press Start to jump directly to intro sequence.

(UNI) Music mode:
Right before title screen appears, at copyrights screen hold Right + A + B and press Start. If you do not want to wait for copyrights screen disappear hold additionally Select button.

(BUR) GameGenie:
SKKLUKXT-Enables level select cheat. Just press at player number select menu at title screen Right, Left, Down, Up, A, B. A sound will confirm correct code entry. Then press Start. Note: level 6-3 inaccesible.

Moon Crystal

(UNI) Stage select:
Hold Up on second controller then press Reset.

Mortal Kombat 3 - Special 56 Peoples

(UNI) JY company's easter egg:
Press Up, Right, A, Down, Right, B, Up, Left after demonstration mode starts.

Mouryou Senki Madara

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

Ms. Pac-Man (U) (Namco)

(BUR) GameGenie:
EEOGAAAA-Enable debugging feature.
To enter debug menu on title screen A + Select, to change level use Left or Right on title screen.
To reset use Select + Start.
To adjust level brightness pause game then press A + Select or B + Select. Probably there is have other stuff to do.

(BUR) Hidden text:
In addition to generic NAMCO buried copyrights 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.

Ms. Pac-Man (U) (Tengen)

(GEN) In-game reset:
Press A + B + Select + Start during game play to return to the game menu. Press A + B + Select + Start again to return to the title screen.

(UNI) Level skip:
Pause game and press following buttons 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 button to skip current level.

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) Maximal 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) Slow dog:
At title screen press at the same time Down + A + B on first controller. Running dog will stuck confirming correct code entry. From now dog in game will be slower.

Mutant Virus, The

(UNI) Another quest:
At title screen hold on first controller Up + A + B + Select then press Start, image of man in space suit changed as well as starting level.

NARC

(FIX) Continue:
Hold Up + A + B + Select + Start at the title screen. A countdown timer will appear in the life power window after all lives have been used. Press Start to continue game play at the current location.

(BUR) Disabled cheat:
This game contain another one cheat combination for title screen: Up + A + B + Start. But in final release it writes zero to the same var as "continue" cheat. Probably there was some another cheat, but now it disabled.

Nagagutsu wo Haita Neko - Sekai Isshuu 80 Nichi Daibouken

(BUR) Hidden text:
There is some hidden copyright text inside ROM: "Program and Audiovisual Copyright 10/01/86 Shouei System Programmed by Masahiro."ACTOR".Yoshihara Yasuhide.Sakakura Pictured by Kenichi."RINA".Suzuki Makoto."TIYA TIYA PIRAYASHIMUN".Higa Naomi."PUTTSUN".Satoh Music by Kaori."LIONS".Aoki Ochakumi by Kyouko."MADONNA".Yoshino Mie."UMBRELLA".Takano", and at the end of copyright message some other: "WATASHITACHINI AI WO KUDASAI .. COPY SURUNA ! Kono kurou wo wakattene !" which means "PLEASE, LOVE US, DO NOT COPY! Try to be in our shoes!".

Nangoku Shirei!! - Spy Vs Spy

(UNI) Sound box:
Right before level ends at least one A and one B button on any controller should be held. If done right, sound box will appear.

(UNI) Unknown:
While in "sound box" mode press B button on second controller for resetting music and pause.

(UNI) Staff:
While in "sound box" mode hold on second controller Right + A + B to switch to "Staff" mode. Just shift cursor to second page and return it back and you'll see two staff screens.

Nantettatte!! Baseball

(UNI) Credits:
Press Up, Down, Left, Right, Up, Down, Left, Right, B, B, B, A at the title screen when message "push start" appears.

(UNI) In-game reset:
Press quickly Start then Select.

(BUR) GameGenie:
These features was disabled in final release, but with GameGenie codes you can access each of them by entering cheat code for "credits" mode.
IGVULLKP+NZVUGUVX-ROM and DROM self-test
TTVULLKO+ELVUGUVZ-Sound test
PGVULLKP+OLVUGUVZ-Backup RAM test (clear all SRAM memory)

(BUR) Debug Hook:
Entry point: 0xC085.

Napoleon Senki

(UNI) Sound test mode:
At scenario select screen press Left + A + B on second controller.

Navy Blue

(UNI) Sound test:
At the game end, after ending animation is over and screen with "Presented by I'MAX" is displayed, press Up, Up, Down, Down, Left, Right, Left, Right, B, A, Select.

(UNI) Password generator:
PositionField
Random:
Password:

Nekketsu Kakutou Densetsu

(GEN) Sound test:
At title screen hold Left + Select then press A.

(GEN) End battle:
At title screen hold Right + Select then press A. Select "STORY MODE" to advance to the end battle.

(GEN) Select same character:
Hold A + B on second controller and press Start on first controller at the title screen to allow both players to select the same character in "BATTLE MODE".

(FIX) Fight as Toraji:
Select "BATTLE MODE" then select "NO CHARACTER EDIT" mode. At team member select screen hold Right + Select then press A.

(FIX) Fight as Toraichi:
Select "BATTLE MODE" then select "NO CHARACTER EDIT" mode. At team member select screen hold Left + Select then press A.

(UNI) Password generator:
Note: you can not set any name used in game for other characters as your name while creation your char. Also that names can not be used in passowrd. But one exception: name "くにお" allow you to play as Kunio itself. Notice that he have 5th blood type instead any of 4.
Blood type:
Name:
Birth:-Month-Day
Level:
Team:
Bits:
Random:
Password:

Nekketsu Koukou Dodgeball Bu - Soccer Hen, Nintendo World Cup

(BUR) GameGenie:
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 0xFFF6 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 presing B on second controller on any script movie.
EKNYVYAA-Bit 7. Enables "SAMPLE VERSION" mode. In this mode some debug features available:
You can select game stage by pressing A on scond controler at level number screen.
You can select any enemy team screen at "timeout" screen by pressing A on second controller.
In game hold on first controller Select then press on first controller A to win current match, B to get timeout, Up to loose.
In game hold on first controller Select then press on second controller one of these buttons A, B, Right, Left when ball near of your or enemy's gates to get control of goalkeeper or sort of. ;)

New Ghostbusters II

(GEN) Secret menu:
At the title screen hold A + B, then press Start.

New York Nyankies, Rockin' Kats

All versions:

(GEN) Extra 6 lives and full energy:
Press Start to pause game play. Then, hold Down + A + B and press Start again.

(GEN) Expert mode:
Press Start to pause game play. Then, hold Up + A + B and press Start again.

(GEN) Exit level:
Press Start to pause game play. Then, press A, A, A to return to the channel selection screen.

Japan version:

(UNI) Secret passwords:
たたかえてきたおせ　-Last Boss. Note: only 9 symbols used
みせておくれみせて５-Ending sequence
きついねこれきついね-Bonus level.
くれアイテムくれくれ-All items.
ほしいおかねくれくれ-Extra 5000 money.
ねこ５０ねこ５０ねこ-Extra 50 lives.

US version:

(UNI) Secret passwords:
F♊GHTB♋SS -Last Boss. Note: only 9 symbols used
♉ND♊NG5♥♥♥-Ending sequence
M♈PH♈RDM♈P-Bonus level.
P♋W♉R★♌P!!-All items.
G♉T!M♋N♉Y$-Extra 5000 money.
K♈TS50K♈TS-Extra 50 lives.

Ninja Cop Saizou, Wrath of the Black Manta

Japan version:

(UNI) Invulnerability:
Press B, B, Select, A, Up, Select, Right, Start on before title screen appears, "MUTEKI" text appears.

Ninja Gaiden (U), Ninja Ryukenden (J), Shadow Warriors

(FIX) Sound test:
Hold Down + Left + A + B + Select then press Start when the phrase "Tecmo Presents 1989" appears.

Ninja Gaiden 2 - The Dark Sword of Chaos, Ninja Ryukenden II - Ankoku no Jashin Ken, Shadow Warriors Episode II - The Dark Sword of Chaos

(GEN) Sound tests:
Hold Up + Left + A + B + Select and press Start when title screen first appears to display Ryu. Wait until title screen fades out, press Start then Up + Left + A + B + Select and press Start again to display Irene Lew. Finally allow 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.

Ninja Gaiden 3 - The Ancient Ship of Doom, Ninja Ryukenden III - Yomi no Hakobune

US version:

(UNI) Extra 99 continue:
Wait until title screen fades out then press Start, repeat this 8 times then hold Up + Left + A + B + Select and press Start.

All versions:

(BUR) GameGenie:
ENNNOYAY-No cutscenes mode.
YUNNOYAN-Enables debug features.
After reset you will be able to listen music and 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 same number.

Ninja Kun - Ashura no Shou

(UNI) Freeze hi-score:
Press A, B, A, B, B, A, B, A at the title screen.

Nobunaga no Yabou - Sengoku Gunyuu Den, Nobunaga's Ambition 2

(GEN) Sound test:
On 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

(GEN) Sound test:
Press Up, Up, Down, Down, Left, Right, Left, Right, B, A when starting credits goes on and only one bulger on the horse is present on the screen.

Nuts & Milk

(UNI) Secret message:
Start new game press Start to pause it then hold Right + A on second controller, hold Left + A + B + Select on first controller and press Start. "VERSION 1 1985 05 29 BY KIKU" appears. "KIKU" is a programmer of HUDSON Kikuta Masaaki (菊田政昭). He put secret codes with messages almost in all his games under HUDSON label."

Operation Wolf

(UNI) Unknown:
Press Up, Down, Right, Left, A, B, Down, Up at the title screen, cursor don't disappear after shooting on level selecting screen.

Orb 3D

(GEN) Conserve fuel:
Press A, B, Left, B, A, Right on the intermission screen between levels or before level 1 begins. Fuel use will be half of normal.

Over Horizon

(GEN) Change graphics:
Hold A + B on first controller and press Reset. Menu cursor will change to confirm correct code entry.

(GEN) Sound test:
Hold Up + Select + Start on first controller and press Reset.

(UNI) Level select:
Hold Right + A + B on second controller and press Reset. While in game, hold Select on first controller then by pressing A button on second controller advance to the next level.

(BUR) GameGenie:
ITXIAVTT-Enable unused game scene, seems used to be some alternative ending scene draft. Just press Start on title screen to see it instead of game start.

P'radikus Conflict, The

(UNI) Hi power weapon:
Press B, Up, Right, A, Down, Left while pause game, a sound will confirm correct code entry.

Pac-Land

(BUR) Hidden text:
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:
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.

Pachi Com

(BUR) Hidden text:
Game ROM contain interesting hidden text in Japanese and some part in South dialect. Some of programmers complaining about dumb director or stuff member, says about hidden pachinko sound stuf that "sounds better" and so on. Finally it says that similar message contain version of this game for MSX computer, but that message totally in south (Okinawa) dialect and unreadable without translator. ;) 
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 !!!

Palamedes (U)

(GEN) Sound test:
Hold A + B on second controller and press Start on first controller at the title screen.

(GEN) Demo test:
Hold Right + A on second controller and press Start on first controller at the title screen.

Palamedes 2 - Star Twinkles

(UNI) Sound test:
At title screen hold A + B on second controller then press Start on first controller.

Panda Prince

(UNI) Copyright screen 1:
At title screen press Up, Left, Down, Down, Right, Right, Left, Up.

(UNI) Copyright screen 2:
At player number screen press Left, Up, Right, Right, Down, Down, Left, Up.

Panda World

(UNI) Level skip:
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 tothe 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:
In game, when 0 lives left, scores are divisible by 200 (eg 200, 600, 2200, etc.), and 50 seconds left, press Start to pause game, then press A + B, extra one live (not heart) will be obtained.

Paperboy (U)

(GEN) Skip to Week 900:
At the title screen press Left, Left, Left, Left, Left, Left, Left, Left, Left, Right, Right, Right, Right, Right, A, B, A, B, hold A + B + Select + Start.

Parallel World

(UNI) Secret passwords:
All number according to certain pattern on password screen. Blank pattern (without any routes) have number 19. Each number means how much times you should press A button to reach desired pattern.
5, 1, 1, 6
9, 1, 1, 7
2,19,19, 2
3,19,19, 3		-Sound test
5, 1, 1, 6
2, 5, 6, 2
2,19, 2, 2
4, 1, 3, 2		-Ending sequence

Parasol Stars - The Story of Bubble Bobble 3

(UNI) Continue:
Press A, B, B, A, Left, Right, Left, Right at the title screen, "c" letter appears in upper left screen corner.

(BUR) Hidden text:
There is a hidden copyright text in ROM: "MUSIC DRIVER V1.0 (C)JONATHAN DUNN & OCEAN SOFTWARE".

Paris-Dakar Rally Special

(UNI) Unknown:
Press Up, Up, Down, B, Right, Left, Left at the title screen.

Parodius (E), Parodius da!

(GEN) Full power-up:
Pause game and press Up, Up, Down, Down, Left, Left, Right, Right, A, B, A, B.

Perfect Fit

(BUR) Demonstration screen:
There was some "DEMONSTRATION SCREEN" routine with according message, disabled "TIMER -" message and it's own NMI routine. Entry point: 0x9A4C. Probably was replaced by copyrights screen, probably has have some debug fuctions disabled in current releae. Additionally string "20TH SEPTEMBER, 1989." was at the end of copyright screen overwriting "OF AMERICA." string. According to title year "1990" this is was date previous proto release or something.

Pictionary

(BUR) Abuse filter:
No one following player's names you could enter: "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:
This game using for padding some info about developers. By some reason, probably mistake, these text is from another game by the same developers, "Sky Shark". 
SKY SHARK
COPYRIGHT TAITO AMERICA CORP
     PROGRAMMER   STEPHEN RUDDY 1988
         ARTIST   ANDREW THRELFALL
       MUSICIAN   TIM FOLLIN
  SOFTWARE CREATIONS LTD
FIRST FLOOR    204 OXFORD ROAD
MANCHESTER    M1 5QA
GREAT BRITAIN
TEL 061 236 1154
FAX 061 236 8248
   JELLYFISH BEANS AND CUSTARD

Platoon

(UNI) Secret words:
Enter one of following words as player name for the hi-score screen:
KOMADA-Sound test
SUZUKIKUN-Ending sequence 1
HIROKUN-Ending sequence 2

Pocahontas (As)

(UNI) Stage select:
Before title screen appears press A + B + Select + Start.

(BUR) GameGenie:
ZAXEPEXY+OAXEZAEA+EPXEIAEO+YLXAIAZS-Enable test menu screen disabled in release version as for couple of other chinese games.
Just press Reset. Right before test menu small copyright screen "FC SYSTEM" will appears and message "LIBRARY READY!" will flash a couple of seconds. Under "(C) COPYRIGHTS" string there is another sting, but it colored the same color as background: "EI-HOW YANG".
"level map test" menu item donesn't work.

Pocahontas 2

(UNI) Debug mode:
At title screen press Up, Left, Down, Right, A, A, B game starts in debug mode. Now pause the game and press A + B button, you'll be able to move Pocahontas any place of map. Press Start again to throw she to new place.

(UNI) Level select:
At title screen, before pressing Start button hold following buttons:
Down-Level 2
Left-Level 4
Right-Level 6

Power Blade (U), Power Blazer

US version:

(FIX) Sound mode:
At title screen hold Left + A + B on second controller then press Start button on first controller.

Japan version:

(UNI) Power Boomerang:
Press Left, Up, Right, Down, Up, Up, B, A, B, A at the title screen.

(UNI) Sound mode:
At title screen hold Left + A + B on second controller then press Start button on first controller.

Both versions:

(BUR) Hidden text:
There is hidden message inside game ROMs: "TOSHIKAZU IWASA".

Power Punch 2

(GEN) Fighter skip:
Hold A + B + Select and press Start when the picture of the next fighter appears.

Power Rangers 3

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

Power Rangers 4

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

Predator

Japan version:

(BUR) Sample ROM:
Japan version contain text block for message "PREDATOR SAMPLE ROM", but there is no script entry to put this message on screen in final release. 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) Sound test:
Press A twice, B twice at the title screen, then press Start.

(UNI) Ending sequence:
Press A three times, B three times at the title screen, then press Start.

(BUR) GameGenie:
NXVVXKZX+VVVVUKSV-Enables "GAMEN TEST MODE" instead of "SOUND TEST MODE", allows you to see all game dialogs and menus.

(BUR) Hidden text:
Game ROM contain some hidden copyright text: "1989ANOTHERltd." and "Another Ltd. 1989/6/09 New ", "$CA", "$DE", "$B0", "$BC", "$DE", "$AE", "$DD". Last 7 symbols are unknown, it seems this is not ROM pointers. Maybe some japan encoded strings.

(BUR) Hidden text:
This game uses string "HOT-B" as SRAM signature.

Prince of Persia

(UNI) Password generator:
Level:
Time:
Random: 
Password:

Pro Sport Hockey, USA Ice Hockey in FC

Japan version:

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

US version:

(BUR) GameGenie:
IEKNZYYO-Enable "Sound test" mode disabled in US version.
Just press Reset.

Pro Yakyuu - Family Stadium '88

(GEN) Credits:
At title screen hold A + B on first controller then press Start.

Probotector II - Return of the Evil Forces, Super C, Super Contra (J)

All versions:

(GEN) Sound test:
Hold A + B and press Start at the title screen.

Japan version:

(FIX) Extra 30 lives:
Press Right, Left, Down, Up, A, B at the title screen.

US version:

(FIX) Extra 10 lives:
Press Right, Left, Down, Up, A, B at the title screen.

Punisher, The

(UNI) Double lives:
At the any mission selection screen press on second controller Left, Right, A, Right, B, Up, Up, A. A sound will confirm correct code entry. You can enter code four times during the game before any new mission. Code can be combined with any other codes.

(FIX) Extra 999 submachine gun rounds:
At the any mission selection screen press on second controller Right, A, B, B, B, A, Left, A. A sound will confirm correct code entry. You can enter code only two times during the game before any new mission. Code can be combined with any other codes.

(FIX) Extra 25 bazooka rounds:
At the any mission selection screen press on second controller A, B, B, Up, Up, Left, Down, A. A sound will confirm correct code entry. You can enter code only two times during the game before any new mission. Code can be combined with any other codes.

(FIX) Extra 999 assault rifle rounds:
At the any mission selection screen press on second controller Up, A, A, A, A, Left, Left, Down. A sound will confirm correct code entry. You can enter code only two times during the game before any new mission. Code can be combined with any other codes.

(FIX) Skip level:
At the any mission selection screen press on second controller Down, B, A, B, Up, Down, Down, Right. A sound will confirm correct code entry. Now you can press Select during the game to skip current level. You can enter this code only once, but effect is permanent for all missions. Code can be combined with any other codes.

Pyokotan no Dai Meiro

(BUR) GameGenie:
ZEEIVAPA-Enable internal debugging screen.
Just press Reset.

Quarter Back Scramble

(UNI) Sound test:
At title screen after message "push start" appears hold A button then press Right, Up, Left, Down, Right, Down, Left, Up then release A button, hold B button and press Right, Up, Left, Down, Right, Down, Left, Up again. Because cheat count only correct pressings, but not care about wrong ones, just hold first A then B buttons and roll over D-pad buttons for some times.

Quattro Adventure

(BUR) GameGenie:
Absolutely all games by Codemasters have internal PRG ROM and CHR RAM testing routines. They called "Smiley tests". Tests are normally enabled, but for triggering it needs pressing all D-pad buttons. For performing PRG ROM test it needs to hold Up + Down + Left + Right + A + Select + Start. For performing CHR RAM test it needs to hold Up + Down + Left + Right + B + Select + Start. Without controller modification it is impossible. GameGenie codes allows you to do not use D-pad buttons for triggering cheat, only A + Select + Start and B + Select + Start. But it affects on ROM's CRC. I ran these tests normally by cheating with debugger, so I wrote normal CRC tests results in brackets.
EUUUVONL-PRG CRC test (test ok)
ANSLXOYY-CHR RAM test

Quattro Arcade

C.J's Elephant Antics game:

(UNI) Secret words:
Enter one of following words as player name for the hi-score screen:
ZIP-
POW-
B52-
WIZ-
SQC-another level
EPX-another level
AZS-another level
37!-energy drink, unlimited bombs

(BUR) GameGenie:
Absolutely all games by Codemasters have internal PRG ROM and CHR RAM testing routines. They called "Smiley tests". Tests are normally enabled, but for triggering it needs pressing all D-pad buttons. For performing PRG ROM test it needs to hold Up + Down + Left + Right + A + Select + Start. For performing CHR RAM test it needs to hold Up + Down + Left + Right + B + Select + Start. Without controller modification it is impossible. GameGenie codes allows you to do not use D-pad buttons for triggering cheat, only A + Select + Start and B + Select + Start. But it affects on ROM's CRC. I ran these tests normally by cheating with debugger, so I wrote normal CRC tests results in brackets.
EUXUVSNL-PRG CRC test (test ok)
ANKLUSYY-CHR RAM test

Quattro Sports, Super Sports Challenge

(BUR) GameGenie:
Absolutely all games by Codemasters have internal PRG ROM and CHR RAM testing routines. They called "Smiley tests". Tests are normally enabled, but for triggering it needs pressing all D-pad buttons. For performing PRG ROM test it needs to hold Up + Down + Left + Right + A + Select + Start. For performing CHR RAM test it needs to hold Up + Down + Left + Right + B + Select + Start. Without controller modification it is impossible. GameGenie codes allows you to do not use D-pad buttons for triggering cheat, only A + Select + Start and B + Select + Start. But it affects on ROM's CRC. I ran these tests normally by cheating with debugger, so I wrote normal CRC tests results in brackets.
ELXPTUNL (US version)
ELXLTUNL (Aladdin version)		-PRG CRC test (test ok)
AYUOZUYY (US version)
AYUUZUYY (Aladdin version)		-CHR RAM test

R.C. Pro-Am 2

(GEN) Secret words:
Enter one of following words as player name:
NES-Extra $5000
DMG-Extra continue

Racer Mini Yonku - Japan Cup

(UNI) Select course:
Press A, Up, Left, B, Down, Right, Start at the title screen. Cause another game mode with course selection mode (four options).

(UNI) Select course:
Press Left, Down, A, Right, Up, B, Start at the title screen. Cause another game mode with course selection mode (six options).

Rad Racer 2

(FIX) Level select:
At title screen press B one less time than the desired level. Hold Up + Left and press Start to begin game play. Level counter wrapped from 15 to 0. Note: game have some "bug", if you press B more or equal than 8 times and just press Start road will be missed, only black screen and some stuff will be visible.

(GEN) Continue:
Press A + Start after losing a race to resume game play at the last track.

Raid on Bungeling Bay

(BUR) GameGenie:
AEEGANAT-Enables secret message "BY KIKU" at end of copyright text of title screen. There was some cheat code on development stage. Meaning of pressing Up + B + Select combination before resetting console to enable this secret message. But in final release there is no pad reading routines called from RESET routine before cheat code check. So only way to enable it in final release this GG code. "KIKU" is a programmer of HUDSON Kikuta Masaaki (菊田政昭). He put secret codes with messages almost in all his games under HUDSON label.

Rainbow Islands - The Story of Bubble Bobble 2

Japan and US versions:

(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.

US version:

(UNI) Start with maximum power:
Press Start to pause game play, then press Up, Down, Left, Right, A, A, B, B 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.

Japan version:

(UNI) Start with maximum power:
Press Start to pause game play, then press B, A, A, Up, Down, Down, B, Right 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 ROM:
Japan version contain unreferenced text string "SAMPLE VERSION" at end of 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...>...

European version:

(BUR) Hidden text:
There is a hidden copyright text in ROM: "MUSIC DRIVER V1.0 (C)JONATHAN DUNN & OCEAN SOFTWARE".

Rampart (J)

(BUR) Disabled cheat:
At address 0x96D3 opcode for cheat comparison present, combination is Up, Up, Down, Down, Left, Right, Left, Right, B, A, standart Konami cheat. Totally disabled, probably used at early development stages, but was removed, cheats does nothing with any variable in game, seem so.

Robin Hood - Prince of Thieves

(GEN) Secret passwords:
Press A, A, A, A, A, A, A, A, B, B, B, B, B, B, B, B at the title screens. 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

Robocop (U)

(GEN) Continue:
Hold A + B + Select and press Start at the game over screen.

Robocop 2

(BUR) Hidden text:
There is a hidden copyright text in ROM: "MUSIC DRIVER V1.0 (C)JONATHAN DUNN & OCEAN SOFTWARE".

Rocket Ranger

(GEN) Last level:
Begin game play and enter the "War Room" screen. Transfer all your agents to the country of Lutonia. Select the "Continue" option and press A. Then, hold Start and press Select. The briefing for the last level will be displayed. Return to the Rocket Lab to play the last level of the game.

Rod Land

(BUR) Vulgarity check:
If you enter as a name one of following words your fairie will be with ashamed red face: "SHT", "FUK", "BUM", "TIT", "SEX", "VAJ", "CNT", "POO", "NOB", "DIK".

(UNI) Level select:
Enter first fairy name as "ICH" and second fairie as "EAT", now press Select throught the game to access level select menu.

Roger Clemens MVP Baseball

(UNI) Credits:
At title screen press A, A, B, B, Up, Down, Select.

Rollergames

(BUR) Source codes:
There is a lot of bat files sources all along with the hex data files with data for EPROM programmer inside ROM.

Rolling Thunder

Japan version:

(UNI) Extra 5 continues:
At main title menu hold Up + A on second controller, then hold Up + B and press Start on first controller.

Route-16 Turbo

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

Rush'n Attack

(FIX) Glitch:
Hold Start or Select buttons then press Reset. Release it after title screen appears. From now all demo sequences will have music along with the sounds.

SD Battle Oozumou - Heisei Hero Basho

(UNI) Easy mode:
At "START/CONTINUE" title menu press Up, Left, Down, Right, B, A, A, B. From now in battle you won't take any side effects if HP less than 9.

SD Gundam - Gachapon Senshi 4 - NewType Story, Di 4 Ci - Ji Qi Ren Dai Zhan

(BUR) GameGenie:
EPXYEYOE-Enable debug mode. Hold A then press Reset to enter CHR test mode, hold B then press Reset to enter OBJECTs test mode. There were some other modes for Up and Down buttons, but there is no proper bank settings before they call, first one lead to HUGE WEAPON BLAST animation at bank 7, second one seems point nowhere.

SD Hero Soukessen - Taose! Aku no Gundan

(UNI) All heroes:
Press Up, Right, Down, Left, B, B, A, A on game pause, heroes will be selectable while gameplay by pressing Select.

Saiyuuki World (J)

(UNI) Cheat mode:
Press Up, Down, Up, Down, A at the title screen. 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 first controller.

Saiyuuki World 2 - Tenjoukai no Majin, Whomp'Em

(UNI) Quick boss:
Pause the game by pressing Select button. Оn second controller 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 current level's boss.

(GEN) Sound test:
At the title screen hold A + B on second controller, then press Start on first controller, continue holding A + B until sound test mode appears.

Sanma no Mei Tantei

(BUR) Hidden text:
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:
GANYNTEI-At reset game performs some manipulations with expansion port sending and reading some data sequence to it then compare resulting data with original. Probably there is some special device for testing purposes only. With this code you may pass device checking and see CRC test itself. If data matches, game performs partial (one from each 15 bytes) data CRC tests. While checking PRG data display color is red and if check fails display will remain red and game stops. While checking CHR data display color is green and if check fails display will be flashing from red to green infinitely. GoodNES version ROM pass this check normally.

Satomi Hakkenden

(BUR) GameGenie:
GEOKYAAX-Engine test mode. You can scroll backgroung in any direction with first controller, move test sprites and write sting "TEST0123456789TEST" to the backgroung with second controller buttons. Buttons A and B on first controller play some test sounds.

Section Z

(BUR) CRC test:
Entry point: 0xC009, CRC test fails, internal CRC is wrong, no crossrefs to this function in code.

Seicross

(GEN) Continue:
Hold A and press Start at title screen after game over.

(FIX) Invulnerability:
At title screen hold Left + A + B on second controller and press two times Up and two times Down buttons in any sequence then press Start on first controller.

(GEN) Adjust difficulty:
At title screen hold Left + A + B on second controller and press A on first controller.

(FIX) Level select:
At title screen hold Left + A + B on second controller and press B one less time than the desired level, but maximum 4.

Seikima II - Akuma no Gyakushuu

(UNI) Level select:
Press B, A, A, B, A, A, B, A, A, A, B, A, B at the title screen.

Shatterhand, Tokkyuu Shirei - Solbrain

(GEN) View bosses, sound test:
Press A, A, A, A, B, B, B, B, A, B, A, B, A, B, A, B at the title screen when message "PUSH START" appears.

(BUR) Bank test:
Game contains text strings for disabled extra options to debug menu. 
00009EB0: 4F 53 53 20 46 44 23 6C 45 58 49 54 00 49 21 0C OSS FD#lEXIT.I!.
00009EC0: 42 41 4E 4B 20 54 45 53 54 00 48 21 0C 42 47 4D BANK TEST.H!.BGM
00009ED0: 20 54 45 53 54 00 4A 21 0C 53 4F 55 4E 44 20 54 TEST.J!.SOUND T

(BUR) Hidden text:
Game contains hidden copyright text at end of file. 
1991 NAGOYA NATSUME INC
METAL COMMANDO G1
PROGRAM  K.ISHIHARA
DESIGN  S.TANIGUCHI
DESIGN  N.MIZOGUCHI
DESIGN  S.MATSUURA
DESIGN  BIT
SOUND  H.IWATSUKI
MUSIC  I.MIZUTANI

Shin Samurai Spirits 2 - Haoumaru Jigoku Hen

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

Shinobi

(GEN) Level select:
Press Down, Down, Left, Right, Up, Up, Start at the title screen.

Side Pocket

(UNI) Extra 256 balls:
Press Left, Right, Right, B, Right, Left, B, Left, B, Right, Left, B on challenge screen, after starting game a sound will confirm correct code entry.

Silva Saga

(BUR) Sound debugger:
There was "FAMICOM SOUND DEBUGER" mode at development stage in this game similar to one from "Magic Darts" game. In final release most of functions used by this debugger was moved and code itself was broken. 
00020EB0: A0 46 20 24 F0 4C BE AE 46 41 4D 49 43 4F 4D 20 .F $.L..FAMICOM
00020EC0: 53 4F 55 4E 44 20 44 45 42 55 47 45 52 00 A2 D2 SOUND DEBUGER...
00020ED0: A0 AE 8E 36 00 8C 37 00 A2 20 A0 66 20 24 F0 4C ...6..7.. .f $.L

(BUR) Sound test:
There was one more sound test mode at development stage, but unfortunately broken by latest modifications. There were whole bank 17 is for some debugging code, another bank with routines should be mapped at C000. But there is no code anymore for these routines or they was moved. 
0002E6A0: 65 73 74 20 56 65 72 31 2E 30 21 0B 0A 4D 75 73 est Ver1.0!..Mus
0002E6B0: 69 63 20 20 20 30 30 21 4B 0A 45 66 66 65 63 74 ic 00!K.Effect
0002E6C0: 20 20 30 30 21 8B 05 50 61 75 73 65 21 CB 04 43 00!..Pause!..C

Silver Eagle (Sachen)

(UNI) Continue:
After loosing all lives, when "Continue?" option appears, select "Yes" and press Select, A, A, B, A, Up, Select then press Start. You will start from room where you were dead.

Silver Surfer

(FIX) Secret passwords:
Press Up on both controllers to display the password screen.
FPNFR7-Possessor 1
9KY3FG-Possessor 2
GDXK4F-Level skip
2SKSKQ-
B73MSK-
PL3ZZ5-
MJXT8H-
J3PS67-
RNHWDF-
5QRXD6-
CMN17D-
TGQ2JT-
NSLWDF-
LNQ283-
1X1ZTS-
JMDFWK-
H6N7D4-
WVL3R9-
KJTTJK-Invulnerability
CKWJT4-Full weapons
KCHDR4-Second quest
S4FHFB-Third quest
68VKG9-
J8SCL9-Two extra continues
SJM333-Unlimited continues

Simpsons, The - Bart Vs. the Space Mutants

(GEN) Sound test:
On level 1 shoot the "E" with a rocket of the "Quik-E-Mart" sign. Then catch extra life item. You will be rewarded by three extra lives and new sound test option. Choose it by pressing Select button, select sound by pressing Up or Down then press Start to play.

Skate or Die 2 - The Search for Double Trouble

(GEN) Level select:
Select adventure mode. Press Start, A, Select, B on second controller during game play. Then, press:
Right-Mall
Left-Beach
Up-Planet level.

Sky Destroyer

(UNI) Invulnerability and slow fire:
Press and hold Select + Start buttons then press Reset. When the new game starts, there is no damage will be taken. In addition if you hold A + B buttons before pressing Reset, firing speed will be reduced almost three times.

(UNI) Secret message:
Start a new game then take damage to both left and right wings. Do this three times and on "GAME OVER" screen Secret message "PRESENTS BY KOBAYASHI & OHTSUKA" will appears.

(GEN) Bonus object Satellite:
Destroy two air fortresses in row and all planes in sky will destroyed at once and you will see falling satellite. If you shoot it you will be rewarded.

(GEN) Bonus object Dirigible:
Destroy floating battleship just before it disappear at horizon and you will see flying dirigible. If you shoot it you will be rewarded.

(UNI) Bonus object Yacht:
At night phase destroy distant enemy ship at horizon at the same time it appears, on very first animation phase (you must shoot forestalling) and you will see floating at horizon yacht. If you shoot it you will be rewarded.

Sky Kid, Super Sky Kid

(FIX) Continue:
At title screen after game over hold Down + Left on second controller then press Start on first controller.

Smash T.V.

(FIX) Circuit warp:
At the player number selection menu hold at least one B button on any controller along with at least one Right button on any controller then press but not hold Start button.

Solomon no Kagi (J), Solomon's Key (U)

(GEN) Continue:
At the "Game Deviation Value" screen, hold Up + A + B.

Solstice

(GEN) Unlimited lives:
Press Select during game play to display the sub-menu. Press B, Start, Start, B, B, Start, Start, B, B, Start, Start, Start, B, Start, B, B, B, Start, Start, Start, B, Start, B, Start, Start, B, Start, Start, B, B, Start, B, Start. The screen will flash to confirm correct code entry. Note: This also refills all potions.

Somari, Sonic 3D Blast 5, Sonic 3D Blast 6

(UNI) Debug mode:
Press Left, Down, B, A, Right, Up, A, B, Up, Down, Up, Down at the title screen, you will may select level and play music.

Space Harrier

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

(GEN) Special effects:
Do the sound test code, then play the songs in this order: 7, 4, 3, 7, 4, 8, 1.

(GEN) Stage Select:
Do the sound test code, then play the songs in this order: 7, 6, 5, 4, 3, 2, 1.

Space Hunter

(UNI) Cheat mode:
Before entering any planet press and hold on second controller Right + A + B. After entering planet you will earn 255 power and at bottom of the screen will be displayed current room coordinates.

Spelunker

US version:

(BUR) Hidden text:
There is some hidden text inside ROM: "REMAKE TAMTEX".

Splatter House - Wanpaku Graffiti

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

(UNI) Ending sequence:
Hold Up + A + Select on first controller then press Reset.

(UNI) Restore energy:
In game press Start to pause the game, then press A + B on second controller, press Start again to return to game mode with fully restored energy. Be careful, after using this cheat three times restoring energy is unavailable.
Info from Яковлев Виктор

(BUR) GameGenie:
AAUZAAEE-Enable "Scene select mode". Just press Select at title menu. While programm is waiting for button pressings on title screen, some array is checked for validity, but at release version first element is wrong, so checking is fails. Array should starts with "DEBUG" word. ;)

(BUR) Stage select:
Game contains strings for "Stage select mode" menu. But no code for this mode exisisted. 
00018350: 3F 3F 3F 3F 3F 3F 3F 3F 3F 3F 3F 3F 3F 3F 3F 3F ????????????????
00018360: 05 00 00 00 00 00 11 53 54 41 47 45 00 53 45 4C .......STAGE.SEL
00018370: 45 43 54 00 4D 4F 44 45 07 53 54 41 47 45 00 31 ECT.MODE.STAGE.1

Spot

(GEN) Display the Credits:
Set all four players to AI level 5, and just sit back and let the Nes play against itself. Once the game is over, the ending cinema will display the credits instead of the usual "Wins!".

Spy Hunter

(GEN) Extra 10 cars and all weapons:
For enabling all weapons cheat you should have held buttons A + B + Select + Start on title screen. Additionally, you can hold with these Right button to get extra 10 cars. For enabling extra cars cheat without getting all weapons, you should have held only Right + Select + Start buttons on the title screen. Note: normally during the game when timer is counting you have infinite cars, but when timer stops you haven't extra cars anymore. With extra cars cheat you get only 10 cars indepenently from main timer, if you dies 10 times no matter within timer range or not, you'll die.

Sqoon

Japan version:

(BUR) Hidden text:
There is a hidden copyright text inside ROM: "COPYRIGHT 1986 HOMEDATA ALL RIGHTS RESERVED madokakina!".

Square no Tom Sawyer

(UNI) Sound test:
Press Up, Up, Down, Down, A, B, Up, Down at the title menu on second controller. Change radio tuning to play next Song.

Stack Up (Robot Block)

(BUR) Hidden text:
There is some hidden message inside ROM: 
 Programed by

  T.NAKAMURA

  6/24 is
    my birthday.
    
     1985/6/24
  TOMOYO
     chan

    
      ROBOT 1
    
     1985/6/24
and one more: 
 ROBOT  SOUND
  5/5 1985
 HIROKAZU.TANAKA

Star Force

Japan version:

(UNI) Invulnerability:
At title screen hold on second controller one of the following combinations: Up + Right + A + B or Up + Left + A + B if Start or Select not pressed, if Start or Select is pressed then you can continue holding or not holding any direction buttons on second controller. All these combinations is good. While holding mentioned above combinations on second controller, hold Up + Left + A + B% on first controller then press Start.

Star Luster

(UNI) Palette test:
When title screen stops scrolling and title name starts flashing with various colors quickly press Select, B, A, Right, Left, Up, Select, B, Down, Right before it stops flashing. Use Up or Down buttons to change color, Left or Right to change region of screen to clorize.

Star Soldier

(UNI) Different graphics:
Cheat will work only if internal microphone triggered on by loud voice, if it triggered once, you will be able to get cheat triggered next 1-2 seconds. From now. Press Select 5 times at the title screen. Then, hold Left + Right + A + B using both controllers. Then, press Select + Start on first controller once for enable cheat. Press Start while continue holding all pressed buttons to disable it back. Note: you can hold any buttons on any controllers to set full combination, but you can't press on one controller Left + Right simultaneously, so press opposite direction buttons on separate controllers. Release buttons and press Start to start the game. Normally you must complete 16 levels to get this graphics switched.

(FIX) Full weapons:
If you using Famicom with internal microphone in second controller, be quiet, cheat not working if microphone detected loud sound. ;) Press Select 10 times at the title screen. Then, hold following combination Up + Down + Left + Right + A + B using both controllers then press Start on first controller once for enable cheat. Press one more time Start while continue holding all buttons pressed before to disable it back. Note: you can hold any buttons on any controllers to set full combination, but you can't press on one controller Left + Right or Up + Down simultaneously, so press opposite direction buttons on separate controllers. Release buttons and press Start to start the game. By pressing Select during the game you can switch between regular shot and laser.

(BUR) Hidden text:
There is some hidden text in two 16K CHR ROM blocks just before numbers graphics: "I love M.Akakura", "Madwoman Megumi". Each block is according to one game graphics pack switchable by cheat above. Another HUDSON's games contain some secret messages about "KIKU" and "MEGU". "KIKU" stands for Kikuta Masaaki (菊田政昭) but "MEGU" was still unknown. It seems there was some woman programmer in HUDSON. Both messages from "Star Soldier" means woman with name starting with "M". What if this is the same woman names? M.Akakura and Megumi must be same person just in both good and bad moods. ;) So we have probably name of beloved woman programmer - Megumi Akakura.

(BUR) Hidden text:
RESET routine in this game uses string "NONTAMA." to check if game was soft or hard reset.

Star Trek - The Next Generation

(GEN) Secret passwords:
LORE-
SELA-
SAREK-
SOONG-
VASH-
OVERRIDE-
WHOOSH-

Star Wars - The Empire Strikes Back

(FIX) Cheat mode:
Press Start during game play, press Select then within 2 seconds after that press Right + A + B + Select + Start, now game is waiting for entering cheat code. Press B, B, Start, A, B, Start, B, B. Only 8 button pressings allowed, so be accurate. ;) Now, you can press one of the following buttons to complete the code.
Select-Skip current level
Start-Gives all forces

(UNI) Sound test:
When a message "A LONG TIME AGO, IN A GALAXY FAR, FAR AWAY..." is displaying press Left + Select. Press Select to switch between "MUSICAL SEQUENCES", "EMPIRE SOUNDFX" and "DIGITAL SOUNDS" modes.

Sted - Iseki Wakusei no Yabou

(BUR) GameGenie:
GEOKYAAX-Engine test mode. You can scroll backgroung in any direction with first controller, move test sprites and write sting "TEST0123456789TEST" to the backgroung with second controller buttons. Buttons A and B on first controller play some test sounds. There is no full ASCII symbol table in final release, so text in ureadable.
AANGIAAE-Powerful CHR data viewer. Just reset the game. There is no full ASCII symbol table in final release, so text in ureadable.
GANGIAAA-Powerful memory editor/viewer enabled. Just reset the game. There is no full ASCII symbol table in final release, so text in ureadable.

Strider

(UNI) Password generator:
Shift:
Level:
Keys:
Boots:
Red Dragon:
Plasma Arrow:
Data Files:
Analyzed Data Files:
Unk:
Password:

Stunt Kids

(UNI) Level Select:
Press one of the following combinations at the title screen to enter various levels:
Right, Left, Right, Right, Left, Left, Right, Left
Select, Right, Select, Down, Select, Left, Select, Up
Select, Right, Select, Down, Select, Left, Select, Up
Left, Right, Select, Right, Left, Select, Up, Down
Up, Down, Select, Select, Up, Down, Down, Right
Right, Right, Left, Right, Select, Right, Left, Left
Right, Up, Left, Up, Right, Up, Select, Up

(BUR) GameGenie:
Absolutely all games by Codemasters have internal PRG ROM and CHR RAM testing routines. They called "Smiley tests". Tests are normally enabled, but for triggering it needs pressing all D-pad buttons. For performing PRG ROM test it needs to hold Up + Down + Left + Right + A + Select + Start. For performing CHR RAM test it needs to hold Up + Down + Left + Right + B + Select + Start. Without controller modification it is impossible. GameGenie codes allows you to do not use D-pad buttons for triggering cheat, only A + Select + Start and B + Select + Start. But it affects on ROM's CRC. I ran these tests normally by cheating with debugger, so I wrote normal CRC tests results in brackets.
ELSYSONL-PRG CRC test (test ok)
AYVNOOYY-CHR RAM test

Summer Carnival '92 - Recca

(FIX) Change limit:
Hold Select button before title screen appears. Change Hi-score limit then press Start to continue game.

(GEN) Infinite lives:
Enter "change limit" mode and before pressing Start to exit to title screen press and hold Up + A + B + Select.

(FIX) Sound test:
At title screen press Start when "normal game" is selected then quickly hold Select while cursor is blinking.

(UNI) Stage select:
At title screen enter "sound test" mode then press and hold A + B and press Select + Start simultneously. Each time you perform this operations, stage number increased by 1, now you can start game from any desired level including second missions (starts from 4th stage) and ending (12th stage). Level number cycled from 1 to 12 and after 12 changes back to 1.

(FIX) Zanki Attack:
At title screen press and hold Up + A + B + Select then press Start. Game will start with 50 lives, enemies release after suicide many small bullets, score is ranked by remaining lives.

(BUR) GameGenie:
IEUSTGAA+AXUSYKGG+NKKIAGEI+KSKIPGUI-Enable hidden intro sequence. To watch it, before animated logo "naxat soft" appears and roll on screen press and hold Start button. First of all "S?GA" logo and sega-like sound will appear, then blow up an instead will appear "Nint?ndo" logo from bottom of the screen. Looks like this was funny secret intro option disabled in final release.
Info from BMF54123

Sunman

(GEN) Level skip:
Pause the game then press A + B on second controller.

Super Chinese 3

(UNI) Secret passwords:
あいう-Music Mode
かきく-Start with maximum Level and Power
さしす-Credits
たちつ-Start with maximum Level and Power (another code)
ぱぴぷ-Movie mode
なにぬ-Message mode

Super Contra 3

(UNI) JY company's easter egg:
Press Up, Up, Up, Up, Down, Down, Down, Down, Left, Left, Right, Right before title screen.

(UNI) Stage select:
At stage info and scores screen before starting the level press A + B + Select.

Super Contra 7

(GEN) Extra 50 lives:
Hold A or B at title screen then press Start.
Info from Iniche

(GEN) Credits:
Hold A + B at title screen then press Start.
Info from Iniche

Super Donkey Kong 2

(UNI) Easter egg:
Press Left, Left, Down, Up, Down, Left, Right, Up, Right, Left at the title screen.
Another way to get this secret is to press at title screen A + B + Select, password screen will appears. Enter only one existing password: "STAYCOOL" (for "Hi-Game 1999" version this code is "HLSP1129").

(UNI) Reset to title:
Pause the game then press Select to return to title screen.

Super Donkey Kong [p1]

(UNI) Stage select:
Push at the title screen A + B + Select on first controller.

(BUR) GameGenie:
XIXALEXG+GTXEPAGV-Enable test menu screen disabled in release version.
Just start game, menu will appears after pressing Start at the title screen. Right before test menu small copyright screen "FC SYSTEM" will appears and message "LIBRARY READY!" will flash a couple of seconds. Under "(C) COPYRIGHTS" string there is another sting, but it colored the same color as background: "EI-HOW YANG".
"level map test" donesn't work at all.

Super Mario World

(UNI) Level select:
Press Select, Select, Select, Select, Select, B, B while map mode. Then press Select to enter Level select screen.

(UNI) JY company's easter egg:
Press Up, Right, A, Down, Right, B, Up, Left while game pause.

Super Pang

(UNI) Easter egg:
Pause game then press A, B, Up, Down, B, A, Down, Up. Message "SACHEN" appears above "PAUSE" message. During pause mode you can press Select to reset password entering and start again if you missed something.

Super Pang 2

(UNI) Easter egg:
Pause game then press A, B, Up, Down, B, A, Down, Up. Message "SACHEN" appears above "PAUSE" message. During pause mode you can press Select to reset password entering and start again if you missed something.

Super Pinball

(BUR) Hidden text:
There is a hidden copyright text for sound driver inside ROM: 
Copyright (C)
1988 06 05
SOFT MACHINE
    NAKAKUMA
SAITO
TOMONAGA

Super Robin Hood

(UNI) Extra 4 lives:
At title screen hold Left + A then press Start.
Info from Яковлев Виктор

Super Shinobi

(UNI) Debug feature:
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.
Info from Яковлев Виктор

Super Turrican

(UNI) Invulnerability:
Select "Highscore" at the title screen and after they shows up press Select, Left, Up, Right, Down, Left, Up, Right, Down, Select. A sound will confirm correct code entry. Then return to main menu and start the game.

Super Xevious - Gump no Nazo

(UNI) Level select:
Start new game, before destroying any enemy press Start to pause game. Then press Up, Down, Left, Right, A, B. "Enter Password" screen appears. Press Left or Right to select digit, press A or B to select number.
6974-Level 2
1797-Level 3
5328-Level 4
3580-Level 5
6541-Level 6
3024-Level 7

Sword Master

US version:

(FIX) Warp to level 7:
Hold Up + Select then press Start at the title screen.

(FIX) Continue:
Hold Down + Select then press Start at the title screen. At the "continue" screen instead "continue xx" message, "free play" message appears.

T& C 2 - Thrilla's Surfari

(UNI) Infinite lives:
Press Left, Up, Right, Up, Right, Down, A before game starts.
Thanks Kitsune for corrections.

Tag Team Pro-Wrestling, Tag Team Wrestling, Special Tag Team Pro-Wrestling

(GEN) Continue:
Hold Up and press Start.

(UNI) Super Tag Team Champions:
Press Up, Right, Down, Left, Down, Right, Up, Left, A, B on title screen then start a new game.
not complete

Taito Chase H.Q.

(GEN) Level select:
Hold Down + A + B and press Start when the phrase "PRESS START" appears on the title screen. The number "11", which represents a game level, will appear as a score. Press A or B to change this number and begin game play at the selected level.

Taiyou no Shinden - Asteka 2, Tombs and Treasure

(UNI) Sound test:
Hold A + B on first controller and press Reset.

(UNI) Debug mode:
Start the game, then take all items on the table and exit the lab. Now enter the Nunnery directly north. When in the Nunnery: take the Ixmol Jewel held by the statue, wash the Ixmol Jewel, put Sword, wash Lighter. Then you should see the message "Nothing has changed", now hold Select + Start and press A and the numbers "3 00" will appear. Hold B, press Up or Down to select an area, press Left to change to the new area and then Start to begin the new area. Press Up or Down for item select, press A to turn item "on" or "off" the new item and press Start to enable the changes. Additionally exit the debug menu by pressing Start, then highlight "PULL", hold Select + Start and press A. The number 64 should appear, then press Left or Right to switch between sounds and press Up to listen to it. Press Down to stop listening to the selected tune.
Info from NesWorld

Takahashi Meijin no Bouken Shima IV

(BUR) Debug mode:
Seems to be totally disabled. Variable depending: 0x70=0x0C, 0x71=0x00.
Info from BMF54123

Takeshi no Chousenjou

(GEN) No-mic mode:
Game using for some controls builtin microphine. You can get help whith using mic. Any time in game press Down + A on second controller, from now pressing of A button on second controller will be used as mic input. Character says "もしもし" any time you do it. It means "Hullo!" by telephone speaking.

Tatakai no Banka, Trojan

(GEN) Continue:
Hold Up + Start on title screen, after getting "Game Over".

Tecmo Bowl

(BUR) Blue Screen of Death:
Standart interrupt handler used in this game as error handler while IRQ is disabled. NMI routine when triggered checks byte at top of stack for S bit set. This means any called routine is in ROM data range and do not running at low memory area. If it happens handler triggered with blue screen of death.

(UNI) Password generator:
Play as:
Play with:
Played:Indianapolis
Miami
Cleveland
Denver
Seattle
Los Angeles
Washington
San Francisco
Dallas
New York
Chikago
Minnesota
Team select:
Password:

Tecmo Super Bowl

(GEN) Sound test:
Hold B button at title screen then press Left.

(BUR) Blue Screen of Death:
Entry point 1A bank at 0x8000, address 0x9A00.

Tecmo World Cup Soccer

(UNI) Password generator:
Play as:
Play with:
Played:Brazil
W.Germany
Italy
Holland
Argentina
Soviet
Uruguay
Poland
England
Spain
Colombia
Scotland
France
USA
Korea
Japan
Team select:
Password Japan:
Password Europe: