Mostly Unpublished Game Boy Cheats ;)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.

  3 Choume no Tama - Tama and Friends - 3 Choume Obake Panic!!
  4-in-1 Funpak
  Ace Striker (Japan, Rerelease), Goal! (USA, Europe), J.Cup Soccer (Japan)
  Adventure Island (USA), Takahashi Meijin no Bouken Shima II (Japan)
  Adventure Island II (USA), Takahashi Meijin no Bouken Shima III (Japan)
  Adventures of Lolo (USA), Lolo no Daibouken (Japan)
  Adventures of Pinocchio, The (Prototype), Otto's Ottifanten (Europe)
  Adventures of Rocky and Bullwinkle, The
  Aero Star (Japan), Aerostar (USA)
  After Burst
  Akazukin Cha Cha
  Akumajou Dracula - Shikkokutaru Zensoukyoku (Japan), Castlevania - Legends (USA)
  Akumajou Special - Boku Dracula-kun (Japan), Kid Dracula (USA)
  Aladdin
  Alien vs Predator - The Last of His Clan
  All-Star Baseball '99
  Amazing Penguin (USA/Europe), Osawagase Penguin Boy (Japan)
  Amazing Spider-Man, The
  Amazing Tater (USA), Puzzle Boy II (Japan)
  America Oudan Ultra Quiz
  America Oudan Ultra Quiz Part 2
  America Oudan Ultra Quiz Part 3
  America Oudan Ultra Quiz Part 4
  Amida
  Animal Breeder
  Animal Breeder 2
  Animaniacs
  Another Bible
  Aoki Densetsu Shoot!
  Arcade Classic No. 1 - Asteroids, Asteroids (Single cart)
  Arcade Classic No. 3 - Galaga
  Arcade Classic No. 4 - Defender
  Arcade Classic No. 4 - Joust
  Arcade Classic - Battle Zone & Super Breakout
  Aretha II
  Aretha III
  Asterix
  Asterix & Obelix
  Athena no Hatena
  Atomic Punk (USA), Bomber Boy (Japan), Dynablaster (Europe)
  Attack of the Killer Tomatoes
  Avenging Spirit (USA, Europe), Phantasm (Japan)
  Bakenou V3
  Bakenou TV '94
  Bakuchou Retrieve Master
  Bakuretsu Senshi Warrior (Japan), Cyraid (USA)
  Banishing Racer
  Batman
  Batman - The Animated Series
  Batman - Return of the Joker
  Batman Forever
  Battle Arena Toshinden (USA, Europe), Nettou Toshinden (Japan)
  Battle Bull
  Battle City
  Battle Crusher
  Battle Pingpong
  Battle Unit Zeoth
  Battle of Kingdom
  Battle of Olympus, The
  Beavis and Butt-head
  Beethoven's 2nd
  Beetlejuice
  Berutomo Kurabu
  Best of the Best - Championship Karate (USA), Kick Boxing, The (Japan)
  Bikkuri Nekketsu Shinkiroku! - Dokodemo Kin Medal
  Bill & Ted's Excellent Gameboy Adventure
  Bionic Commando
  Bishoujo Senshi Sailor Moon
  Black Bass - Lure Fishing (USA), Hyper Black Bass (Japan), Hyper Black Bass '95 Black Label (Japan)
  Blades of Steel (USA, Europe), Konami Ice Hockey (Japan)
  Blaster Master Boy (USA), Blaster Master Jr. (Europe), Bomber King - Scenario 2 (Japan)
  Block Kuzushi GB
  Blues Brothers, The Jukebox Adventure
  Bokujou Monogatari GB (Japan), Harvest Moon GB (USA)
  Bomb Jack
  Bomberman GB (Japan), Wario Blast Featuring Bomberman! (USA)
  Bomberman GB 2 (Japan), Bomberman GB (USA)
  Bomberman GB 3
  Bonk's Adventure (USA), GB Genjin (Japan), B.C. Kid (Europe)
  Bonk's Revenge (USA), GB Genjin 2 (Japan), B.C. Kid 2 (Europe)
  Booby Boys
  Boomer's Adventure in ASMIK World
  Boomer's Adventure in ASMIK World 2
  Boxing (Japan), Heavyweight Championship Boxing (USA)
  Boxxle (USA), Soukoban (Japan)
  Boxxle 2 (USA), Soukoban 2 (Japan)
  Bram Stoker's Dracula
  BreakThru!
  Bubble Bobble
  Bubble Bobble Part 2 (USA), Bubble Bobble Jr. (Japan)
  Bubsy 2
  Burai Fighter Deluxe
  Bust-A-Move 2 - Arcade Edition (USA), Puzzle Bobble GB (Japan)
  Bust-A-Move 3 DX
  Ca Da
  Cadillac II
  Captain Tsubasa J
  Captain Tsubasa VS
  Card Game
  Castelian (USA, Europe), Kyorochan Land(Japan)
  Castle Quest
  Castlevania II - Belmont's Revenge (USA), Dracula Densetsu II (Japan)
  Catrap (USA), Pitman (Japan)
  Cave Noire
  Chachamaru Panic
  Chachamaru Boukenki 3 - Abyss no Tou
  Chalvo 55 - Super Puzzle Action
  Championship Pool
  Chessmaster, The (Early Japan, USA), New Chessmaster (Later Japan, USA, Europe)
  Chibi Maruko-chan 2 - Deluxe Maruko World
  Chibi Maruko-chan 3 - Mezase! Game Taishou no Maki
  Chiki Chiki Machine Mou Race
  Chikyuu Kaihou Gun ZAS
  Choplifter III
  Chuck Rock
  Chuugaku Eijukugo 350
  Chuugaku Eitango 1700
  Cliffhanger
  Collection Pocket
  College Slam
  Chou Mashin Eiyuu Den Wataru: Mazekko Monster 2
  Contra (Japan), Operation C (USA), Probotector (Europe)
  Contra - The Alien Wars (USA), Contra Spirits (Japan), Probotector 2 (Europe)
  Cool Ball
  Cool Spot
  Cool World
  Cosmo Tank
  Crayon Shin-Chan - Ora to Shiro-ha O-Tomodachi Daiyou
  Crayon Shin-Chan 2 - Ora to Wanpakku Gokko Dazou
  Crayon Shin-Chan 3 - Ora no Gokigen Athletic
  Crayon Shin-Chan 4 - Ora no Itazura Dai Henshin, Super Mario 4 (Pirate)
  Crystal Quest
  Cutthroat Island
  Daedalian Opus (USA), Puzzle Road (Japan)
  Daffy Duck - The Marvin Missions
  Daiku no Gen-san - Robot Tekikoku no Yabou
  Darkwing Duck
  Daruman Busters
  Days of Thunder
  Dead Heat Scramble
  Dennis the Menace (USA), Dennis (Europe)
  Desert Strike - Return to the Gulf
  Dexterity (USA), Funny Field (Japan)
  Dick Tracy
  Dino Breeder 2
  Disney's Mulan
  Dodge Boy
  Donkey Kong
  Donkey Kong Land (USA), Super Donkey Kong GB (Japan)
  Donkey Kong Land 2 (USA), Donkey Kong Land (Japan)
  Donkey Kong Land III
  Doraemon
  Doraemon 2
  Doraemon Kart
  Doraemon no Study Boy 5 - Shou 2 Sansuu Keisan
  Double Dragon
  Double Dragon II (USA), Nekketsu Kouha Kunio-Kun - Bangai Rantou-Hen (Japan)
  Double Yakuman
  Double Yakuman 2
  Double Yakuman Jr.
  Dragon Ball Z - Gokuu Gekitouden
  Dragon Slayer I
  Dragon Slayer Gaiden
  Dropzone
  Duck Tales 2
  Dungeonland
  DX Bakenou Z
  Eijukugo Target 1000
  Eitango Center 1500
  Eitango Target 1900
  F-1 Race
  Faceball 2000
  Family Jockey 2
  Famista 2
  Famista 3
  Felix the Cat
  Ferrari - Grand Prix Challenge
  Fidgetts, The
  FIFA International Soccer
  FIFA Soccer '96
  FIFA Soccer '97
  FIFA Soccer '98 - Road to the World Cup (USA), World Cup '98 (Europe)
  Final Fantasy Legend, The (USA), Makai Toushi SaGa (Japan)
  Final Fantasy Legend II (USA), SaGa 2 - Hihou Densetsu (Japan)
  Fire Dragon (Unlicensed)
  Fire Fighter
  Fish Dude (USA), Uoozu (Japan)
  Fist of the North Star (USA), Hokuto no Ken - Fist of the North Star (Japan)
  Flash, The
  Fleet Commander VS
  Flintstones, The
  Flintstones, The - King Rock Treasure Island
  Football International (USA, Europe), Soccer (Japan)
  Fortified Zone (USA), Ikari no Yousai (Japan)
  Frank Thomas' Big Hurt Baseball
  Frisky Tom
  From TV Animation Slam Dunk - Gakeppuchi no Kesshou League
  From TV Animation Slam Dunk 2 - Zenkoku heno Tip Off
  Fushigi no Dungeon - Fuurai no Shiren GB
  G1 King - 3 Biki no Yosouya
  Game & Watch Gallery (USA, Europe), Gameboy Gallery (Japan), Gameboy Gallery 2 (Australia)
  Game & Watch Gallery 2 (USA), Gameboy Gallery 2 (Japan), Gameboy Gallery 3 (Australia)
  Game genie V1.17 (BIOS)
  Game of Harmony, The
  Gameboy Gallery (USA)
  Gameboy Wars (Japan), Gameboy Wars Turbo (Japan, Rerelease)
  Ganbare Goemon - Sarawareta Ebisumaru!
  Ganbare Goemon 2 (Japan), Mystical Ninja (USA)
  Ganbaruga
  GB Genjin Land - Viva Chikkun Oukoku
  GB Pachislot Hissyouhou Jr.
  GBKiss Mini Games
  Gear Works
  Gem Gem
  Ghostbusters II
  Ginga (Tornado Appetizer)
  Global Gladiators (Prototype)
  Go Go Ackman
  Go! Go! Hitchike
  Go! Go! Tank
  Godzilla (USA), Godzilla-kun - Kaijuu Daikessen (Japan)
  Golf
  Golf Classic (Europe), Sports Illustrated - Golf Classic (USA)
  Goukaku Boy Series - Gakken - Yojijukugo 288
  Goukaku Boy Series - Shikakui Atama wo Marukusuru - Kanji no Tatsujin
  Goukaku Boy Series - Shikakui Atama wo Marukusuru - Keisan no Tatsujin
  Gradius - The Interstellar Assault (USA), Nemesis II (Japan), Nemesis II - The Return of the Hero (Europe)
  Great Greed (USA), Vitamina Oukoku Monogatari (Japan)
  Gurander Musashi RV
  Hal Wrestling (USA), Pro Wrestling (Japan)
  Hammerin' Harry - Ghost Building Company (USA), Daiku no Gen-san - Ghost Building Company (Japan)
  Hayaoshi Quiz - Ouza Ketteisen (The King of Quiz)
  Hercules
  Hero Shuugou!! Pinball Party
  Higashio Osamu Kanshuu Pro Yakyuu Stadium '92
  High Stakes Gambling
  Hinsyutu Eibunpo
  Hit the Ice
  Hoi Hoi - Gameboy Ban (Japan), Stop That Roach! (USA)
  Home Alone 2
  Hon Shougi
  Hong Kong
  Hook
  Hudson Hawk
  Hugo 2
  Humans, The
  Hunchback of Notre Dame, The - Topsy Turvy Games
  Hunt for Red October, The
  Hyper Lode Runner
  Ikari no Yousai 2
  Incredible Crash Dummies, The
  Initial D Gaiden
  Iron League
  Ironman - X-O Manowar in Heavy Metal
  Ishido
  Itchy & Scratchy - Miniature Golf Madness
  Itsudemo Nyanto Wonderful
  J.League Fighting Soccer
  Jack Nicklaus Golf
  James Bond 007
  Kaijuu-Oh Godzilla
  Kung-Fu Master (USA), Spartan X (Japan)
  Kwirk (USA), Puzzle Boy (Japan)
  Lucle
  Maus, Die
  Meitantei Conan
  Metal Jack
  Metroid II - Return of Samus
  Nakajima Satoru - F-1 Hero '91
  Nectaris GB
  Pocket Bomberman
  Rampart
  Sachen 4-in-1 Vol. 1 - Street Rider
  Sachen 4-in-1 Vol. 5 - Magical Tower
  Sachen 4-in-1 Vol. 5 - Worm Visitor
  Sachen 4-in-1 Vol. 6 - 2nd Space
  Sachen 4-in-1 Vol. 6 - A-Force
  Sachen 4-in-1 Vol. 6 - Black Forest Tale
  Sachen 4-in-1 Vol. 7 - Ant Soldiers
  Sachen 4-in-1 Vol. 7 - Dan Laser
  Sachen 4-in-1 Vol. 7 - Zoo Block
  Sachen 4-in-1 Vol. 8 - Explosive Brick
  Sachen 4-in-1 Vol. 8 - Magic Maze
  Sachen 4-in-1 Vol. 9 - Crazy Burger
  Sachen 4-in-1 Vol. 9 - Deep: Final Mission
  Sea Battle (Europe), Schiffe Versenken (German), Bataille Navale (France)
  Super B-Daman - Fighting Phoenix
  Super Chase H.Q.
  Super Hunchback
  Tale Spin
  Teenage Mutant Ninja Turtles (Japan), Teenage Mutant Ninja Turtles - Fall of the Foot Clan (USA), Teenage Mutant Hero Turtles - Fall of the Foot Clan (Europe)
  Teenage Mutant Ninja Turtles 3 - Turtles Kiki Ippatsu (Japan), Teenage Mutant Ninja Turtles III - Radical Rescue (USA), Teenage Mutant Hero Turtles III - Radical Rescue (Europe)
  Turok - Battle of the Bionosaurs
  We're Back! - A Dinosaur's Story (USA), Baby T-Rex (Europe), Agro Soar (Australia), Bamse (Sweden)

Cheats summary:
generic cheats-128
unique cheats-149
buried secrets-117
fixed generic cheats-56
unverified games-778
games with secrets-294
games with no secrets found-157

3 Choume no Tama - Tama and Friends - 3 Choume Obake Panic!!

(GEN) Sound test:
After the boot up, before the initial copyright screen appears, hold Up + Start, then wait for the title screen.
Source: urawaza.in

4-in-1 Funpak

(UNI) Easter egg:
After the boot up, starting from the second screen after the license, the program start counting the Select pressings. Press it 60 times to see a mini-gallery from the developers. The counter is reset between different intro screens, the better time to enter this cheat is the title screen.

Ace Striker (Japan, Rerelease), Goal! (USA, Europe), J.Cup Soccer (Japan)

All Japanese versions:

(UNI) Debug menus:
All cheats should be entered at the title screen, before the message "PUSH START BUTTON" appears. Also all codes should be entered quickly, without pauses between two buttons. Note, there are two title screens in the Rerelease version, code should be entered on the first one.

US version:

(UNI) Game genie:
001‑9CF‑E6E-In the US version the debug menu button sequences are disabled, but all conding and data are still in the ROM. Use this code to enter the complex debug menu at the game boot. To access the simple menu version, additionally to this code set the RAM address 0xC100 to 1.
Source: tcrf.net

Adventure Island (USA), Takahashi Meijin no Bouken Shima II (Japan)

(GEN) Stage select:
At the title screen, after a while, press Right, Left, Right, Left, A, B, A, B.
Source: gamefaqs.com

(BUR) Game genie:
066‑9BF‑E66+E46‑9AF‑4CB-Replace Stage select cheat with Area select. You could start from any sublevel or enable invulnerability.
076‑9BF‑E66+656‑9AF‑4CB-Replace Stage select cheat with Mode select. You may start any of 10 main game events, except 0A event, which is Stage select itself replaced already.

Adventure Island II (USA), Takahashi Meijin no Bouken Shima III (Japan)

(GEN) Secret passwords:
1984-All levels, 99 of everything.
0894-Get 99 of everything.
1231-Stage 1-1 Coastal Clash, 99 of Diamonds, 3 lives.
5915-Stage 1-1 Coastal Clash, 99 of Axes and Boomerangs, 3 lives.
7265-Stage 2-1 Bottomless Pit, 99 of Spades, 3 lives.
4416-Stage 4-3 The Desolation and 4-4 Pyramid Crypt, 4 of every item, 3 lives.
Source: gamefaqs.com

(BUR) Game genie:
There is a powerful debugging mode and menus to test various parts of the game left inside the game. Can be re-enabled by setting address 0xD430 to 8 and 0xD431 to 0 respectively. The two-digits number will appear next to the PASSWORD string. Enter a number and press Start to jump to the corresponding part of the game. Or press B to enable invulnerability. The number FF will bring the Test menu. Unfortunately, the font encoding is different here from the rest of the game, so you can't see an actual text without additional hacking.
Source: tcrf.net

Adventures of Lolo (USA), Lolo no Daibouken (Japan)

Japanese version:

(GEN) Sound test:
Begin a new game, go to the first Merry-Go-Round map screen and enter Select, B.
Source: gamefaqs.com

(GEN) Stage select:
Begin a new game, go to the first Merry-Go-Round map screen and enter Select, Select, B.
Source: gamefaqs.com

Adventures of Pinocchio, The (Prototype), Otto's Ottifanten (Europe)

All versions:

(UNI) Secret passwords:
PQLLQ-Stage select. Dugint the game, on pause, press Up or Down to change current room number, room 101 is an ending. Unpause to jump to it. In the prototype version this cheat is enabled by default.
ZYDRQ-Secret message 1.
RQB1N-Secret message 2. This screen is different in prototype. The version of this screen from release used in many other games by the same developers Bit Managers.

Prototype version:

(BUR) Game genie:
201‑F2F‑19F+003‑7CF‑C4D-Re-enables an unused "Electro Brain" logo at start.

Adventures of Rocky and Bullwinkle, The

(UNI) Secret message:
In the first level, stand on top of one of the 6 "Frostbite falls" poles, then press Up + B + Select + Start to change the signs to one of the corresponding developers names: "KEVIN", "KATHY", "MARK", "GLEN", "DAN" and "TAK TAK TAK". The effect of this is permanent, even if you lose a life, all "Frostbite" tablets will display the last name you uncover.

Aero Star (Japan), Aerostar (USA)

(UNI) Super hard mode:
Complete the game on the Hard mode. At the screen with "THE END" hold Select and press Start. A message "CHALLENGE SUPER HARD MODE" will appear. This cheat is working in the Japanese version, but there are no text due to bug. However it can be fixed with the Game genie code 3CF‑808‑E6A.

(BUR) Game genie:
FAD‑C8E‑E65 (for the Japanese version)
FAD‑DDE‑E65 (for the US version)
-Re-enables "STGAE SELECT" (yes, with wrong spelling) cheat. At the title screen, hold Select, then press Start.

After Burst

(GEN) Self destruct:
On pause, press A + B.

(UNI) Extra 255 lives in 1P VS mode:
At the title screen, put cursor to "PASSWORD", hold Down, then additionally hold Left + A + B.

(GEN) Secret passwords:
19640813-Stage select. The password is a clearly someone's birthday.
Source: makainyumon.web.fc2.com

Akazukin Cha Cha

(FIX) Secret passwords (added 11.08.16):
あかいかみのまほうつかい-Easter cutscene with some character, then return to the title screen. Seems does nothing.
ちかにひみつのめいろあり-A Special Birthday Party dungeon. You'll start at the empty town, find a hole in Laboratory, play this special dungeon and find a birthday party room, following with the Staff roll.
Source: makainyumon.web.fc2.com

Akumajou Dracula - Shikkokutaru Zensoukyoku (Japan), Castlevania - Legends (USA)

(BUR) Sound test (added 30.04.16):
An unused Sound test can be acessed by setting the RAM variables $C520 and $C521 to $0B and $00 respectively.
Source: tcrf.net

Akumajou Special - Boku Dracula-kun (Japan), Kid Dracula (USA)

US version:

(FIX) Secret passwords (added 30.04.16):
7314-Sound test
9814-Mid-level minigames.
Source: gamefaqs.com

Japanese version:

(FIX) Secret passwords (added 30.04.16):
まつたけ-Sound test
ふりかけ-Mid-level minigames.
Source: tcrf.net

Aladdin

(FIX) Level skip (added 04.05.16):
Pause the game, then press A, B, B, A, A, B, B, A. This is the only cheat for the Game Boy on pause, the same as in the NES version.
Source: gamefaqs.com

Alien vs Predator - The Last of His Clan

(UNI) Level skip (added 05.05.16):
During the game, press Select to enter the Weapon menu, then press Up, Up, Down, Down, A, B, A, B. Press Select again to complete current level instantly. This only work up to level 6.

All-Star Baseball '99

(UNI) Scores edit mode (added 06.05.16):
Choose any game mode, when the "Team Options" menu is displayed (no matter if you enter this menu before the game, or during the game by pressing Start), then press Up, Down, Left, Right, Up, Down, Left, Right plus any other button to complete the sequence. A sound will confirm correct code entry. Now, start a game in any mode, enter the "Team Options" menu by pressing Start and enter the "Scoreboard". By pressing Left or Right choose current inning, press Up to increase scores of upper team, or Down to increase scores of bottom team. Also, for the game modes "Playoff" or "Season", when you quit with the higher scores than your opponent, you'll instantly win a current game and the result will be saved in the password as well, as against the normal game without cheat, which is threated quitting as a loosing current game all the time, not mater what you current score is. Repeating this process you can win the entire game in no time.

Amazing Penguin (USA/Europe), Osawagase Penguin Boy (Japan)

(FIX) Secret passwords (added 08.05.16):
To enable these secret passwords, at the title screen hold Left + A, then enter the Password entry screen.
A0A0A0 (for the Japanese version)
101010 (for the US version)
-Enables invulnerability.
F0F0F0 (for the Japanese version)
303030 (for the US version)
-Stage select. There are two numbers appear right to the "START" option at the title screen. You can select any of 40 level.
B0B0B0 (for the Japanese version)
505050 (for the US version)
-Sound test. Select between music and sfx by press B, use D-Pad to select sounds, press A to play.
Source: makainyumon.web.fc2.com

Amazing Spider-Man, The

(BUR) Game genie (added 09.05.16):
633‑6DF‑7F0+B53‑6CF‑6E9+CD3‑6BF‑5D4-Re-enables the Stage select after the title screen. Valid values are 0-7. Use Left or Right to select, press A to play.

Amazing Tater (USA), Puzzle Boy II (Japan)

Japanese version:

(FIX) Secret passwords (added 10.05.16):
MAR10W0RLD-SFX test. Press Up or Down to select, press Left or Right to play.
KAMEMASTER-BGM test. Press Up and Down to play throught the music tracks.
ARA1HELMET-Credits.
WVMP8UXNM9-Secret extra hard level.
Source: makainyumon.web.fc2.com

America Oudan Ultra Quiz

(GEN) Easter egg (added 12.08.16):
At the title screen, press B + Select to make the animated plane's picture little bit smaller. The meaning of this is unknown, but there are no other effects of this.
Source: makainyumon.web.fc2.com

(GEN) Mini-game instant win (added 18.05.16):
After the qualify stage, when you play the Rock-Paper-Scissors mini-game in Narita Airport, hold Down + Select + Start before or immediately after A is pressed to instantly win the current round.
Source: makainyumon.web.fc2.com

America Oudan Ultra Quiz Part 2

(UNI) Qualify quiz hint (added 19.05.16):
Hold Down + Right + A + B + Select before the title screen appears, either at the game start-up of after the game over screen. Now, in the quailfy quiz event (during the flight from Norita airport to USA) you can hear if you answer correct or incorrect, as against the regular game mode with completely silent answering in this event.

(BUR) Game genie (added 19.05.16):
012‑9FF‑E6A-Enables a couple of debug features. First, this will skip the starting qualify events and jumps directly to the main game map. Also, in addition to extra variables display at some game events, it will add two more button combinations to hold before the title screen appears, the same way as for working cheat.
Hold Up + Left + B + Select + Start to see all the 3-answer questions after the game start.
Hold Up + Right + B + Select + Start to see all the yes/no-answer questions correspondingly.

America Oudan Ultra Quiz Part 3

(UNI) Secret passwords (added 20.05.16):
There are a special mode in this game: "Champion Taikai", which asking you a passwords to access it. It seems, they are released during some kind of competition in Japan and maybe well known there.
ジャストめっと-HAWAII event warp.
ジャストみっと-GAME event warp.
ジャストもっと-ROCKY event warp.
アメよこクイズ-"RAIN OF QUIZ" game.

(BUR) Debug passwords (added 20.05.16):
The password system mentioned above were also used for debugging purposes at the developement stage. The password list contains 28 passwords, only 4 are used in game, the rest is disabled. Using the Game genie code 01F‑FCC‑E6A you may re-enable them, so all following passwords will be available. It includes most of the ingame events as well as debug-only routines and sound test.
まるばつ-type 2 quiz debug
さんたく-type 3 quiz debug
じゆうのめがみ-type 1 quiz debug
なりた-NARITA event
グランド-GRAND CANYON event
じらい-GAME event FIELD RUN mini-game
サンフラン-SAN-FRANCISCO event
チキン-GRAN CANYON event RACING mini-game
ビス-BOSTON event
ヘルス-BOSTON event MOTO mini-game
マイ-MAIAMI event
タコ-MIAMI event POT mini-game
ニュウ-NEW-YORK event
チュウンサン-HAWAII event FIELD mini-game
チュウンシ-HAWAII event TRIVIA mini-game
かない-ON THE PLANE event
サメ-SAN-FRANCISCO event FISH mini-game
スケエト-ROCKY event SKATE mini-tame
エンド-Ending
チャネ-Winning slideshow
おと-Sound test
ずる-Always win
アイキュウ-+ 48 iq (used to see all endings for IQ=0/40/80/120)
ドオム-DOME event

America Oudan Ultra Quiz Part 4

(GEN) Flight Quiz Hint (added 10.01.17):
At the beginning of the game, there is a qualify quiz during flight from the Norita airport to USA. You were asked 20 questions, but there are no buzzers for the answers results. But, if you notice, there a small character at the middle-top of the screen. When you answers, he raise its right hand if answer is correct and the left hand in other case, so you may know for sure if the answer correct or not.
Source: urawaza.in

(FIX) Debug passwords (added 10.01.17):
The password system consists of 2 rows of 3 characters, there are 6 different characters. Let's number them from 0 to 5:
0 - "rock"
1 - "scissors"
2 - "paper"
3 - "O"
4 - "X"
5 - "right arrow"
The default password on the password screen is:
0,1,2
3,4,5
If you press A, you will increase the character index, and decrease if press B.
Now, the regular passwords are depending on the name you entered before the game and difficulty setting, to restore the game with a password you must enter the correct name for it first and set the correct difficult.
There are a set of debug passwords for the "ULTRA QUIZ" mode only and not depending on the difficulty settings, which allows you to access every single event in the "ULTRA QUIZ" game, excluding maybe the ending. To use them you must enter the special player's name: "TOMY". If you enter this name at the beginning of the game, you'll get the same debug passwords, while moving to the next stage, but not all of them. The complete set of debug passwords is in the table below:
5,5,5
5,3,1
-hawaii event
3,3,4
1,2,5
-alligator battle
5,4,3
4,4,1
-haunted houses
1,1,2
4,4,3
-baseball second chance
5,5,2
2,2,2
-crane machine
1,1,4
5,5,5
-basketball
3,4,3
4,3,4
-catch chicken
5,1,5
0,5,2
-rock-paper-scissors
2,3,5
5,2,5
-museum
5,3,0
3,3,3
-skiing
0,5,4
0,5,0
-balloon fight
1,2,5
1,2,5
-shooting range
2,3,4
3,4,2
-tv-show
3,3,3
3,3,3
-flight quiz
Source: urawaza.in
0,0,2
2,2,5
-title screen (hanging the game)
5,2,2
1,1,3
-continue screen

Amida

(UNI) Debug menu:
Hold A + B + Select then reset the console. At the white screen press Right, Left, Up, Down.

Animal Breeder

(BUR) Game genie (added 26.05.16):
0C1‑1BE‑E6A-Re-enables the Message debug mode at boot up.

Animal Breeder 2

(UNI) Any creature select (added 28.05.16):
At the title screen, press Right + B. A sound will confirm correcct code entry. Now, start a new game and you'll be able to select any creature to grow instead of 8 predefined characters.

(UNI) Full creature library (added 28.05.16):
At the title screen, press Left + B + Select. A sound will confirm correcct code entry. Now, during the game you'll be able to see any character's info in the library.

Animaniacs

(GEN) Secret passwords (added 31.05.16):
A numbers represents one of the characters: 0 - empty, 1 - Yakko, 2 - Wakko and 3 - Dot
0,1,2
3,3,3
0,1,1
-Level Skip. Pause the game, then press Select.
0,0,3
3,3,2
1,1,1
-Unlimited Lives.
0,1,3
1,3,3
1,3,1
-Unlimited Energy.
0,1,3
2,3,3
1,0,1
-Unlimited Time.
0,3,3
3,3,1
1,1,1
-"Negativ Cheat". Makes two midbosses of the Stage 2 very difficult, increasing its projectiles throw rate half of the minimum threshold.
Source: Factor 5

Another Bible

(BUR) Game genie (added 01.06.16):
C8A‑D28‑C4D-Re-ebanles a debug cheat. At the title screen, first select one of the debug modes described below by pressing Select.
A number of pressings corresponds to the desired function and wrapped around 8, but actally different modes are 5.
When done, press Up, Down, Left, Right, B, B, Up, Down. A sound will confirm correct code enrty. Now during the game use selected options to debug various parts of the game.
All debug modes uses different set of debug flag bits, but the bit 7 is set for all modes:
Function 0-Bit 7 is set (default).
Function 1-Bits 7 and 2 are set.
Function 2-Bits 7, 2 and 0 are set.
Function 3-Bits 7, 2, 1 and 0 are set.
Functions 4-7-Bits 7, 3, 2, 1 and 0 are set.
The following list describes the meaning of each bit:
Bit 7-Commong debug features in all game modes:
In Map mode-Start - switch to Town mode.
Select - next map.
Down + Select - previous map.
In Town mode-Start - switch to Map mode.
Select - next town.
Down + Select - previous town.
In Battle mode-Start - skips the battle
Select - next location background.
Bit 3-All items in any shop.
Bit 2-Skip enemy move in Map mode.
Bit 1-Extra 68000 gold at the beginning of the new game.
Bit 0-All characters at the biginning of the new game.

Aoki Densetsu Shoot!

(FIX) Secret passwords (added 02.06.16):
Every character in the password has an index. The first character Kenji has index 0, the last character Kazumi has index 12. The default state of password is 00,00,00,00. To enter these passwords, you need to set it to default state and press Up a corresponding number of times to set the particular character in corresponding position.
00,09,08,02-Secret team match (Level 5)
12,12,12,12-Slideshow of the Kazumi character's cutscenes.
Source: urawaza.in

(BUR) Game genie (added 02.06.16):
The password system has 5 more "Slideshow" passwords for diferent characters, but they are disabled by setting the incorrect values to the password list. By restoring them using following Game genie codes you may see rather unfinished or maybe boring thus disabled slideshows.
093‑E8B‑6E7-Use password "09,09,09,12".
003‑ECB‑6E7-Use password "00,00,00,12".
083‑F0B‑6E7-Use password "08,08,08,12".
0B3‑F4B‑6E7-Use password "11,11,11,12".
003‑FCB‑6E7-Use password "00,09,08,12".

(BUR) Game genie (added 02.06.16):
05F‑DCE‑E66+05F‑F0E‑E66-Re-enables two hidden menu items at the title menu. One is for Cutscenes debug menu (using the same text as for Settings menu). Another is for Field viewer, but with incorrect CHR data setting.

Arcade Classic No. 1 - Asteroids, Asteroids (Single cart)

(GEN) Invulnerability (added 04.06.16):
At the game mode selection screen, press B, A, A, B, A, B, B, A, B, B, A, B, B. This cheat also work on Arcade Classic version.
Source: gamefaqs.com

Arcade Classic No. 3 - Galaga

(UNI) Free dual ship (added 29.06.16):
During any Challenging Stage after Stage 32, any time pause the game, then quickly press Down, Up, A, Left ("DUAL") to get an instant dual mode ship. The pause between keypress must be less than 1/4 second.

Arcade Classic No. 4 - Defender

(UNI) Skip to hi-score (added 29.06.16):
At the title screen, hold Left, then press Select to skip to the hi-score display immediately without need to wait.

(UNI) Continue (added 29.06.16):
Enter the Options menu, put cursor to the "EXIT" option and press Left 40 times until you hear a sound. Now, instead of game over during the game you'll get to the Continue menu. Continues are unlimited.

Arcade Classic No. 4 - Joust

(UNI) Skip to hi-score (added 29.06.16):
At the title screen, press Left + Select to skip to the hi-score display immediately without need to wait.

Arcade Classic - Battle Zone & Super Breakout

(UNI) Cheat sequences (added 30.06.16):
Any of this cheats can be entered any time in any game either on the title screen or during the game. After entering the sequence press Select to activate a corresponding cheat.
A, B, A, B, A, B, A, B-Show a smiling baby picture with a funny sound.
B, A, B, A, B, A, B, A-Show something creepy with a creepy sound as well.
Up, Down, Left, Right, Up, Down, Left, Right-This has effect in the Battle Zone game. During the game, as you scroll the background, a message will appear:
"AS YOU FIND WHAT YOU NOW SEEK IS MORE INLAND AND WHAT YOU ONCE KNEW WAS SOLID IS JUST SHIFTING SAND".

(UNI) Sound editor (added 30.06.16):
At the title screen of the Super Breakout game, press Up + A + B. You'll be able to set any sound registers parameters and play it by press Start.

Aretha II

(GEN) Easter egg (added 28.02.17):
At the title screen with the bubbles floating, hold either Left or Right to control the direction of the bubbles flow.
Source: urawaza.in

Aretha III

(GEN) Sound test (added 04.02.17):
One of items that can be found in this game called "Aretha CD" and when used enables a Sound test. Investigate, where is to buy this particular item.

Asterix

(GEN) Cheat menu (added 03.06.16):
During the game press Start to pause it. Then enter following code Up, Up, Up, Up, Up, Up, Up, Up, Down, Down, Down, Down, Left, Left, A, B, Right, Right, Right, Right, Right, Right, Right, Right, Left, Left, Left, Left, Up, Up, B, A. A sound will confirm correct code entry, then press Start and game will return to the title screen with extra "cheat" menu item.
Source: gamefaqs.com

(UNI) Invulnerability (added 03.06.16):
Input the Cheat menu code as described above, but before pressing Start to return to the main menu, hold Up + Right + A + B + Select. Start a new game with any cheats as you wish and press Start to pause it again. Enter the Cheat menu code one more time. A sound will confirm correct code entry. Press Start to unpause the game. From this point you will be fully invulnerable.

Asterix & Obelix

(GEN) Stage select (added 03.06.16):
At the title screen, press Left, Left, Left, Left, Right, Up, Up, Down, Select, Right, Right and listen for a sound. A Stage select will now be added to the Options menu.
Source: gamefaqs.com

Athena no Hatena

(GEN) Secret passwords (added 04.06.16):
ZXTB or GSXR-Sound test.
Source: urawaza.in, tcrf.net

(BUR) Game genie (added 04.06.16):
011‑95F‑E6A-Re-enables the quiz questions test mode.

Atomic Punk (USA), Bomber Boy (Japan), Dynablaster (Europe)

(UNI) Sound test (added 05.06.16):
In the GAME A (BOMBER BOY for the Japanese version) mode, at the Stage select screen, enter MY TOWN with Right + A + B + Select held. Note: when you press Right, the selection on the map is changing, so you can either press Right first and hold it when stop on MY TOWN and then hold the rest of the buttons, or just put cursor to the previous position to MY TOWN before holding all the buttons.
Source: tcrf.net

Attack of the Killer Tomatoes

US version:

(GEN) Credits (added 06.06.16):
At the title screen, press B to see a credits. There is no such function in the the Japanese version.

(UNI) Cheat mode (added 06.06.16):
At the title screen, hold Up + Select, then press B, B, A. A title music should stop as well as the tomato face animation. Now, press A a number of times corresponding to desired level number, the title music will restart every time you press a button. Or press B once (hear a sound) to enable invulnerability (flashing mode). Press B one more time (hear another sound), to additionally get an infinite lives and all items at start. Althought this is not disables invulnerability, this will disable flashing. Press Start to begin a game with a selected cheat options at the desired level.

Japanese version:

(BUR) Cheat mode (added 06.06.16):
The the Japanese version seems simply is an early version of this game, so they just didn't coded the cheat input at all. But, there are the same variables controlling the cheat states already coded and working. Set the RAM address $C677 to non-zero value to enable invulnerability, additionally set $C676 to non-zero value to enable infinite lives and get all items as well.

Avenging Spirit (USA, Europe), Phantasm (Japan)

(GEN) Expert mode (added 07.06.16):
This code is unlockable in the Japanese version. If you beat the regular game, there will be a screen with instructions how to enable an Expert mode. If you beat the game on the Expert mode there will be additional ending screen. Both screens were removed in the US version, but the Expert mode still can be enabled the same way: at the title screen, press Up + A + B. A sound will confirm correct code entry in both regional versions. Additionally in the Japanese version, a message "EXPERT" will appear at the bottom-left corner of the title screen.
Source: gamefaqs.com

(GEN) Bad ending (added 07.06.16):
At the title screen, press Down + B + Select. A bad ending happens if you beat the game as a regular haunted character.
Source: gamefaqs.com

(UNI) Good ending (added 07.06.16):
At the title screen, press Down + A + Select. To get a good ending normally you must find three keys hidden in various levels and open the door near the end of the last stage where your girlfriend is imprisoned.

(UNI) Easter egg (added 07.06.16):
During the intro cutscene, hold Up before the 4th screen with a screaming guy appears. The text line "ガチョーン" will appear on the screen in both the USA and the Japanese versions, which means this is just a leftover from the Japanese version not removed in the US version. The text line is an obsolete Japanese word to express shock (gaccho~n).

Bakenou V3

(UNI) Race cheat (added 15.06.16):
At the title screen, press Up, Up, Up, Up, Up, Up, Down, Down, Up, Up. Start a new game and you'll hear a different sound if cheat is enabled. Don't know exactly, what it's doing, but every race results will be slightly different from the regular ones (higher values in the results lists, etc.). Need investigation.

Bakenou TV '94

(UNI) Race cheat (added 15.06.16):
At the title screen, press Up, Up, Up, Up, Up, Up, Down, Down, Up, Up. Start a new game and you'll hear a different sound if cheat is enabled. Don't know exactly, what it's doing, but every race results will be slightly different from the regular ones (higher values in the results lists, etc.). Need investigation.

Bakuchou Retrieve Master

(BUR) Game genie (added 15.06.16):
201‑71F‑91E-Re-enables the complex debug menu at game boot.
Source: tcrf.net

Bakuretsu Senshi Warrior (Japan), Cyraid (USA)

(GEN) Suicide:
Any time during the game, except the bonus stages, hold B, then press Select.

(GEN) Secret passwords:
Enter one of the following words as a password.
THEEND-Harder mode (unlockable after beating the game once).
MUTEKI-Invulnerability.
EPOSAS-Level skip. Hold A and press Select during the game.
Source: gamefaqs.com

Banishing Racer

(GEN) Invulnerability (added 15.06.16):
During the game, on pause, hold Up + Select, then press A + B. A "PAUSED" string will change to one of the messages: "Run^2" or "Jun^2", as well as the sound will be heard. This cheat works only for current level and you still may be hurt by the spikes or by the bosses.
Source: makainyumon.web.fc2.com

(GEN) Stage select (added 15.06.16):
At the title screen, hold Down, then press A + B a number of time corresponding to desired level number, for every press will hear a sound. Press Start to play. More than 15 pressings shows the ending.
Source: urawaza.in

Batman

(GEN) Sound test (added 19.06.16):
At the title screen, hold Up + Right, then press Start.
Source: gamefaqs.com

(FIX) Level and weapon select (added 19.06.16):
The Stage select mode is unlockable here. Beat the game once, then at the title screen press Start to begin a new game, but before the the title screen disappear, hold Select. Additionally, when the final message of the credits roll "THE END" appears, hold Select and wait for the title screen. This will also enable a Weapon select mode. During the game press Select to cycle between all possible weapons.
Source: urawaza.in

(UNI) Batwing shot rate select (added 19.06.16):
During the Batwing stages (3-1, 3-2), press Start to pause the game, then press B, Up, Select, A. Now, you need to input a 4-button sequence, which will be treated as 4-bit binary number, which is representing a desired shoot rate when you hold A during the game. Any buttons except A means binary 0, the A button means binary 1. Lets use for the binary 0 the B button, then we can write down all possible valid codes in the table below. So, the best complete button code of this pause cheat for fastest shot rate is B, Up, Select, A, B, B, A, A. Now, just unpause the game.
B, B, B, B-Invalid value, set to shot rate 15 (slowest) instead 0.
B, B, B, A
B, B, A, B
-Invalid values, set to shot rate 10 (default, used by the game) instead 1 and 2 correspondingly.
B, B, A, A
B, A, B, B
B, A, B, A
B, A, A, B
B, A, A, A
A, B, B, B
A, B, B, A
A, B, A, B
A, B, A, A
A, A, B, B
A, A, B, A
A, A, A, B
A, A, A, A
-All valid values from 3 (fastest) to 15 (slowest) correspondingly.

Batman - The Animated Series

(GEN) Stage select (added 21.06.16):
This cheat is unlockable after a completing the game. Then just press Select at the title screen to enter the regular options menu.
Source: gamefaqs.com

Batman - Return of the Joker

(UNI) Secret bonus (added 18.06.16):
At the title screen, press Left + B + Select. The game will immediately start with a different starting sound, rather than a regular bat wings sound. Now on every boss stage, when the player's health drops below the 3 points, but the boss still has more than 16 health points, the friendly support character will fly over the screen dropping up to 4 heart bonuses. Hovewer, this bonus may be triggered only once for each boss.

Batman Forever

(GEN) Cheat menu (added 22.06.16):
At the difficulty selection screen, press Up, Right, Down, Left, Up, Left, Down, Right. You'll be able to enable all ammo, no damage modes and select any stage to begin the game.
Source: gamefaqs.com

(FIX) Credits (added 22.06.16):
At the difficulty selection screen, press Up, Up, Up, Up, Down, Down, Down, Down.
Source: gamefaqs.com

Battle Arena Toshinden (USA, Europe), Nettou Toshinden (Japan)

(FIX) Special cheats (added 24.06.16):
All cheats are entered at one of the three screens: the Takara logo, the Ellis opening and the title screen. Some cheats may be used only in Super Game Boy mode. When cheat is entered correctly, an unique sound for every cheat will be heard.
Where to input?|Cheat sequence|Effect|SGB only|Is it unlockable?
At the opening screen with Ellis.|Right, Left, A, B|Gaia and Sho unlocked.|No|Yes. For beating Easy mode.
At the Takara logo.|Select, Select, Select|Scorcher mode. A couple of new special attacks may be used now.|No|Yes. For beating Normal mode.
At the title screen.|Up, Up, Select, A, Down, Down, Select, B|Jet mode. Fastest movement speed for all players.|Yes|Yes. For beating Normal mode.
At the opening screen with Ellis.|Up, Down, A, B, Right, Left, A, B|Gaia, Sho, Gaia2 and Uranus unlocked.|No|Yes. For beating Hard mode.
At the Takara logo.|B, A, Left, Right, B, A, Down, Up, B, A|Text mode. View all text messages for the game.|No|Yes. For beating Expert mode.
At the title screen.|Up, Down, Left, Right, Select, A, Select, B|Both players are now CPU controlled in all modes.|Yes|No. Secret cheat.
At the Takara logo.|B, Select, A, Select, Right, Left, Down, Up|Skip tournament and instantly show the ending for any character.|Yes|No. Secret cheat.
Source: gamefaqs.com

Battle Bull

(BUR) Game genie (added 28.06.16):
209‑10D‑E6A+0F9‑11D‑E6A-Re-enables the debug mode. Gives an extra 99999999 gold, invulnerability, and enables the Stage select at the beginning of the game.

Battle City

(GEN) Stage select (added 28.06.16):
At the Stage number screen, press Up or Down to choose a level up to 32 by default. When you beat any games above, you'll be able to select it as well. Beat the game to unlock all levels.
Source: gamefaqs.com

(FIX) Cheat sequences (added 28.06.16):
All cheats are entered at the title screen. A sound will confirm correct code entry. Any number of cheats may be entered, all effects are combined.
Left, Left, B, A, Up, Down, A, Right-Start with 9 lives.
Down, Up, Up, Down, Left, Right, A, B-Unlock all stages in Stage select mode.
B, A, B, B, A, B, A, A-Start with level 3 tank.
Down, Left, Up, A, Right, Right, B, Up-Options menu. Allows you to select game speed, lives and extend mode, which determines one of two score tables for obtaining a new life.
Right, Up, A, Down, B, Left, A, B-Increase number of enemies after Stage 5 on the field at the same time up to 6 (default is 4).
Up, Up, Down, Up, Left, Right, Right, Left-Shovel power-up will use a random block.
Up, B, Left, A, Right, B, Down, A-Enables an auto-fire.
A, Down, A, Up, A, Right, B, Left-Credits, but without unlocking all stages.
Source: tcrf.net

Battle Crusher

(FIX) Special team (added 01.07.16):
At the title screen, when the "PUSH START" message is displayed, press Left, Left, Left, B, A. This cheat also work for a second player in 2-player game either via link cable or with SGB controllers.
Source: gamefaqs.com

Battle Pingpong

(GEN) Secret passwords (added 01.07.16):
1199-Stop watch minigame. This is unlockable password, given to you after beating the final game with Panda.
4989-"NEVER GIVE UP" screen display.
Source: gamefaqs.com

Battle Unit Zeoth

(FIX) Training mode (added 04.07.16):
At the title screen, hold Down, then press A + B a number of times corresponding to the desired stage from 1 to 5. You will start a new game from the selected level with 240 hit-points instead of 8, so technically you will be invulnerable for some time. But you can't advance to the next stage playing this mode, you can play only the selected level again and again. If you press A + B at the title screen 6 times, you'll be able to see the ending. But the staff roll will be different from one you should see if you beat the game normally, containing additional programmer's message. Also, if using this cheat you'll start a new game after the staff roll with only 1 hit-point and no weapon as against the normal ending, which starting a new game with max power lazer and 8 hit-points.
Source: gamefaqs.com

Battle of Kingdom

(GEN) Stage select (added 03.07.16):
After the game is boot up, within first 5 seconds while the title screen is displayed, press Down + A + B + Select. During the game, on the map screen press A or B to skip to the next stage. Also this additionally gives to you an extra 9000 gold. Don't forget to buy come cards before entering any fight, or it will ended up with a game over.
Source: urawaza.in

Battle of Olympus, The

(UNI) Cheat mode (added 04.07.16):
During the game, press A, B, B, A, Up, Down, Left, Left, B, A. Now press B + Select to enable the free walk mode. While in this mode, press A to skip to the next location, or Start to exit this mode.

(BUR) Hidden text (added 04.07.16):
At 0x127B5 in the ROM an unused text string can be found:
BOBMA%RLEY%%
Judging from the place, where it located and its format, this may be either a default names for the Hero and Heroine or a secret names.

Beavis and Butt-head

(BUR) Game genie (added 07.07.16):
080‑A2D‑E6E-Re-enables an unused Stage select screen. You'll be able to select any level, including the Mini-game. The last unnamed option in this menu isn't working.
Source: tcrf.net

Beethoven's 2nd

(UNI) Stage select (added 07.07.16):
During the game, stand still, then press Up, Down, Up, Down, A, A, Up, Down, Down, B. A small number will appear in the middle of game's HUD. Select desired level and press B. Note, that stage indexes are inverted, 0 means the last level, 5 means the first level. The number 6 means the ending screen.

Beetlejuice

(GEN) Stage select (added 07.07.16):
At the title screen, quickly press Left, Right, Up, Up, Down, Down. If you hit the wrong button or pause between two presses more than 1/4 of second, the cheat won't work until you reset the console.
Source: genhoaxer

Berutomo Kurabu

(UNI) Cheat sequences (added 08.07.16):
All cheats entered at the title screen and has effect during the gameplay. Enter one of the following sequences and either start a new game or continue previously saved one. You may notice if cheat is working (except fot the first one, see below), in the main display header, day of the week will be separated with line from the time, otherwise there are no characters between them.
Start, B, Start, Select, B, B, Select, Start-Add all friends to list instantly at the game start. After all friends are added, the cheat flag is set to zero and does no extra functions or indications.
Select, Select, B, Start, Start, B, Select, Start-At the main game menu, hold Down, then press Select to enter the Sound test.
B, Start, B, Start, Select, B, B, Start-This is most powerful debug cheat here. First, any time during the game, hold Select + Start to skip 2 minutes of time every second.
At the Main game menu, hold Down, then press Select to enter the debug menu. Here you can select some of game events, including ending and staff displays, sound test and debug memory viewer.
At the Friends list, hold Select or Start, then press Up/Down to increase/decrease the friendship level correspondingly. A number under the friend's face will indicate the friendship level. If there is no friend at the selected position, it will be added.

Best of the Best - Championship Karate (USA), Kick Boxing, The (Japan)

(UNI) Credits (added 11.07.16):
At the main game menu, hold Select, then press Up. The same credits screen is shown when you beat the game.

(UNI) Secret passwords (added 09.07.16):
KUKUM000-Weaken the enemy to lowest HP.
TONY0000-Invulnerability for player.

Bikkuri Nekketsu Shinkiroku! - Dokodemo Kin Medal

(GEN) Secret team (added 28.02.17):
At the Team selection screen, choose any team, hold Select then press A or Start. The secret 4th team (Oklahoma) will be selected.
Source: urawaza.in

(UNI) Tournament skip (added 11.07.16):
During the game, if you loose one of the first two rounds of any tournament-type competitions, the game for the 1st place will be played by CPU controlled characters. In this case you can skip this unnecessary round, just pause the game, and press Down + A + Select.

(BUR) Unused obj viewer (added 11.07.16):
During the game, pause the emulation and change $C000 and $C001 RAM addresses to $A and $0 correspondingly. This will switch the game in simple debug viewer for currently selected sprites list. This mode does not load an actual CHR data, so you can see only the sprites, loaded by the game previously. So if you enable it during one of the competitions, you may see the complete set of its sprites.

Bill & Ted's Excellent Gameboy Adventure

(GEN) Cheat sequences (added 11.07.16):
All cheats are entered at the title screen, a sound will confirm correct code entry. Cheats can be combined.
Up, Up, B, Down, Right, A-Infinite lives.
Left, Right, Left, Right, Up, A-Infinite time.
Source: gamefaqs.com

(BUR) Game genie (added 11.07.16):
9A1‑3AD‑E61+6B1‑3BD‑7F3-Re-enables an unused memory viewer function, used at the developement stage for verifying the demo recording data. The demo recording code still present in the game too, but need more effort to re-enable it back.

Bionic Commando

(GEN) Return to map (added 13.07.16):
To return back to the map screen any time during the game, press A + B + Start.
Source: gamefaqs.com

Bishoujo Senshi Sailor Moon

(BUR) Game genie (added 13.07.16):
071‑93F‑F72-Replaces the soft-reset function with a Stage select. Numbers from 1 to 4 are select levels, number 5 should select additional cheat flag, maybe invulnerability, but it is never used. Note, that due to hacky method of enabling the Stage select may cause glitches when used.

Black Bass - Lure Fishing (USA), Hyper Black Bass (Japan), Hyper Black Bass '95 Black Label (Japan)

(UNI) Sonar mode (added 14.07.16):
At the title menu, put cursor either to the start or to the continue menu options, then press B + Select. A game will start instantly. Now, during catching seqeunces, the DEPTH/LINE parameters will display the fish position near the lure, rather than actual lure depth and line lenght. The values are in range 0.0-5.0. A higher values means that fish is closer.

Blades of Steel (USA, Europe), Konami Ice Hockey (Japan)

(GEN) Sound test (added 15.07.16):
At the license screen in the US version, or at the Konami logo screen in the Japanese version, press Up, Up, Down, Down, Left, Right, Left, Right, B, A, B, A.
Source: tcrf.net

(UNI) Secret message (added 15.07.16):
There are a few of secret messages hidden inside the ending's staff screens. Each message assigned to its own staff screen and has unique method of revealing. Here is the complete list:
Where to find|How to enable|Effects
The "co-programmer" screen|Press Up, A, Right, A, Down, A, Left, A, then A one more time.|First, the code will show the message "HELLO!! I LOVE ??? FROM .....".
Then, if A additionally is pressed before the message disappears, there will be an ASCII heart displayed.
The "character designer" screen|Hold B, then press A.|The message "NEVER GIVE UP" will be displayed.
The second "special thanks" screen|Press A once to display the first message,
then A two more times for every next message.
|The additional 6 "special thanks" names will be displayed: "H.HATANAKA", "H.UEDA", "T.HAGIHARA", "N.KODAMA", "M.ITO", "R.GOTOU". And the final string will be "AND YOU!!".

Blaster Master Boy (USA), Blaster Master Jr. (Europe), Bomber King - Scenario 2 (Japan)

(GEN) Stage select (added 16.07.16):
At the title screen, hold A and press Start.
Source: gamefaqs.com

Block Kuzushi GB

(UNI) Stage skip (added 17.07.16):
At the title screen, press Up, Left, Down, Right, A. A sound will confirm correct code entry. During the game hold Up/Down and press Select to skip to the next/previous stage correspondingly. Also, on pause press A to manually advance to the next frame.

Blues Brothers, The Jukebox Adventure

(UNI) Stage select (added 17.07.16):
At the Titus logo screen, hold B, then press Right, Left, Up. Release all buttons, then press Select 7 times. Now, at the Stage number screen press Select to change the current level up to 17, after 17th pressing there will be the ending screen.

Bokujou Monogatari GB (Japan), Harvest Moon GB (USA)

(BUR) Game genie (added 23.07.16):
001‑E3F‑6EA
1FF‑819‑E66 (additional code for the US version)
-Re-enables a complex debug menu. In the Japanese version it is fully functional, the US version however has most of the options disabled and invisible. Use additional code to re-enable all options somehow in the US version.
Source: tcrf.net

Bomb Jack

(UNI) Infinite lives (added 23.07.16):
During the game, on pause, press Up, Up, Up, Up, Up, Up, Up, Up, Right, Right, Right, Right, Up, Up, A.

Bomberman GB (Japan), Wario Blast Featuring Bomberman! (USA)

(FIX) Secret passwords (added 25.07.16):
4622-Start game powered up with Bomberman (available in all versions)
5656-The Battle mode with Bomberman (available in all versions)
2264-Start game powered up with Wario (only available in the US version)
6565-The Battle mode with Wario (only available in the US version)
Source: gamefaqs.com

Bomberman GB 2 (Japan), Bomberman GB (USA)

(FIX) Secret passwords (added 26.07.16):
2145-Sound test
5656-The Battle mode
4622-Start the game fully powered
Source: gamefaqs.com

Bomberman GB 3

(GEN) Secret passwords (added 26.07.16):
DEB1F7F-Boss rush mode.
Source: gamefaqs.com

Bonk's Adventure (USA), GB Genjin (Japan), B.C. Kid (Europe)

(BUR) Game genie (added 10.06.16):
009‑23E‑5D5 (for the Japanese version)-Re-enables the Stage select cheat. During the game, press B + Select. The same code present in the US version at 01:$4224, but since there are no more proper caller for this routine, it won't work correctly all the time.
010‑03F‑E6A (for the US version)
000‑03F‑E6E (for the European version)
-Switches the title to different region settings for corresponding versions.

Bonk's Revenge (USA), GB Genjin 2 (Japan), B.C. Kid 2 (Europe)

Japanese version:

(GEN) Stage select (added 14.06.16):
At the title screen, press Down + A + B + Start.
Source: urawaza.in

English versions:

(BUR) Game genie (added 14.06.16):
01A‑CAB‑E6A-In all English versions the Stage select mode were were disabled, but can be reenabled somehow with this code.

Booby Boys

(UNI) Ending (added 27.07.16):
Complete any of the game Worlds, after beating a boss there is a screen with some congratulation message instead of the Stage complete screen. This screen will stay untill you press Start to continue. Press Up + Right + Select to jump directly to the Ending screen. Note, in this case your progress will be lost.

Boomer's Adventure in ASMIK World

(FIX) Secret passwords (added 27.07.16):
All passwords here except the last one are not secret, but this is exactly full set of passwords and its destinations.
AXOLOTL-Level 8 (1st Boss)
BLUTEN-Level 9 (2nd World)
CHIMERA-Level 16 (2nd Boss)
DEWLAP-Level 17 (3rd World)
ELYTRON-Level 24 (3rd Boss)
GILA-Level 25 (4th World)
HYDRA-Level 32 (4th Boss)
IBEX-Level 33 (5th World)
JEDOCH-Top of the Tower
KURZER-Level 24 (Descent)
MINORCA-Level 23 (Descent)
PANGOLIN-Level 16 (Descent)
REMORA-Level 15 (Descent)
TROKEN-Level 09 (Descent)
SCARAB-Level 08 (Descent)
ZAHNBELA-Final Boss
ANCIENT-Stage Select
Source: gamefaqs.com

Boomer's Adventure in ASMIK World 2

(GEN) Secret passwords:
RDEST???-Even if the passwords for Stage 4 is written by the game, they aren't work by itself, only available with this additional password, but other passwords are disabled instead, when it is used, with one exception (see below).
EVE?????-Event viewer.
MAP?????-Debug menu. The only password available when using an extra password RDEST??? as well.
SOUND???-Sound test.
Source: tcrf.net

Boxing (Japan), Heavyweight Championship Boxing (USA)

All versions:

(UNI) Maximum power (added 27.07.16):
Start either a new single player or a two players game. At the player's character selection screen press either Up three times and Down three times in any order, and finally press Select. Continue to setup your character. At the Power management screen, press Up 3 times again and press Select. If done right, the main power meter will be full and you'll be able to set up the max parameters to your character.

(UNI) Extra 255 continues (added 27.07.16):
Start a new single player game. At the Finish blow select screen, hold Down + Select + Start, then press A. If done right, the limit of the continues will be increased up to 255 instead of 3, so virtually you'll have an unlimited continues.

Japanese version:

(UNI) Easter egg (added 27.07.16):
Start a new single player game. As you may notice, the Round number screen will show you the Bunny girl scrolled higher and higher up with every round. The maximum position reached at 12th round. While 12th round screen is displayed, hold Down and quickly press A or B to scroll the Bunny girl up to 24 more lines, revealing the full picture. Althought, the US version has this girl fully drawed as well, the easter were removed and you couldn't see the full picture during the game.

Boxxle (USA), Soukoban (Japan)

(FIX) Credits (added 28.07.16):
At the title screen, press Up + A + B + Select.
Source: gamefaqs.com

(FIX) Special passwords (added 28.07.16):
Q♠MY (for the US version)
さみくち (for the Japanese version)
-Special hidden level 1.
Q♠X4 (for the US version)
さみたの (for the Japanese version)
-Special hidden level 2.

(UNI) Secret passwords (added 28.07.16):
YLM? (for the US version)
かわらふ (for the Japanese version)
-View all cutscenes in row and then the credits.
3947 (for the US version)
とみさわ (for the Japanese version)
-Music test.

Boxxle 2 (USA), Soukoban 2 (Japan)

(UNI) Secret passwords (added 28.07.16):
JYBD (for the US version)
おちあい (for the Japanese version)
-View all cutscenes in row and then the credits.
XK5R (for the US version)
たかはし (for the Japanese version)
-Music test.
?♠Q? (for the US version)
とみさわ (for the Japanese version)
-Credits.

Bram Stoker's Dracula

(UNI) Stage skip (added 30.07.16):
At the Stage number screen, before the game start, start to press B as fast as you can. If one of the pressings occurs right in time, when to Stage number screen is about to disappear, then the current level will be skipped instantly. If you skip the last level, you'll start from the beginning again. The reason why this doesn't work all the time even with autofire option in emulator is because the button pressing trigger lasts just one frame. If button is held for more than one frame, this trigger is resetting. The game checking exactly the pressings trigger, not the helds one. Probably this is just a debug leftover, but maybe just a reward cheat for fastest fingers. ;) To make this cheat reasonable, use Game genie code 9E4‑29F‑914. With this, the skip button should be held instead and will work all the time.

BreakThru!

(UNI) Stage skip (added 30.07.16):
Choose "Options" from the title menu and enter "CREDITS" there. Now press B, A, A, B, B, A. Every single press skips to the next credits screen, and at the "SPECIAL THANKS TO" (6th screen) you'll hear a sound. Now, start a new game. Any time, hold Start and press B/A to skip to the next/previous level accordingly. This also pauses the game, so you must unpause it before continue. On the emulator you can hold auto-fire B/A buttons and then shortly press Start to avoid unnecessary pausing.

Bubble Bobble

(UNI) Password generator (added 01.08.16):
There are two types of passwords can be accepted by the game. The regular passwords generated by the game itself set the maximum level number, flags for collected items and an Expert mode flag. Also, there is a secret password type, uses a different generation method and doesn't affect the level number. Instead it set the power-up flags which is used for enabling a regular in-game power-ups before starting a new level. As against the power-ups picked up during the game, the effect of these passwords is permanent even after continue. Enable "Power-up" checkbox to generate a special password. When entered, a message "POWER UP!" will be displayed with a different sound, but no return to the title screen. You need to exit the password screen first and then start a new game to enable selected power-ups. Also, with one of the special flags you can start with 9 lives instead of 3. Note, that you can't have all power-ups and 9 lives at the same time, instead if all flags are set, when exit form the password screen you'll get the Sound test mode. Also, the special pass should have at least one flag raised, if all flags are clear, the password is invalid.
Level:Power-up:
Magical Cup:Speed:
Magical Jewel:Shot range:
Magical Crown:Shot rate:
Expert mode:9 Lives:
Password:


Bubble Bobble Part 2 (USA), Bubble Bobble Jr. (Japan)

(BUR) Game genie (added 02.08.16):
019‑D0D‑E6A (for the US version)
019‑C6D‑E6A (for the Japanese version)
-Re-enables the debug Stage select and Sound tests screens. During the game, press Select, then Start to enter this mode. A number in the middle of the screen represents the stage index as well as music index. To play music, press A, to start from the selected level press Start. Note, that so called "Stage select" password for this game known before actually is a regular password with stage number above the valid game limits. Any valid game password threated by the game as a Stage select from 1 to level number encoded in the password itself.

Bubsy 2

(GEN) Invulnerability (added 02.08.16):
Pause the game, then press Up, Up, Down, Select, A, A, B, B.
Source: gamefaqs.com

Burai Fighter Deluxe

(UNI) Easter egg (added 03.08.16):
Beat the game either on Ace or Ultimate difficulty to get a graphics ending. Press A to make the character to turn face to the screen.

(FIX) Secret passwords (added 03.08.16):
All secret passwords are staring from Stage 1 on Eagle (Easy) difficulty. The Japanese version passwords are most likely the developer's names, but in the western versions due to removal of letters turns gibberish.
HGDM (for the US version)
HIDE (for the Japanese version)
-99 Lives.
KHDC (for the US version)
KADO (for the Japanese version)
-All weapons.
Source: gamefaqs.com

(BUR) Game genie (added 03.08.16):
015‑52E‑E6A (for the US version)
01D‑95F‑E6A (for the Japanese version)
-Re-enables the Invulnerability cheat. At the Stage number screen hold Up + Left + B before press A or Start.

Bust-A-Move 2 - Arcade Edition (USA), Puzzle Bobble GB (Japan)

(GEN) Extra puzzles (added 05.08.16):
At the title screen, press A, Up, B, Down. A small character will appear at the bottom-right corner of the screen. This cheat is unlockable after completing the regular puzzle mode of the game.

(UNI) Extra continues (added 05.08.16):
Enter Options menu, put cursor to the Credits option, then press Left, Right, B, A, A, B, Right, Left. A small countdown timer will appear at the top-right corner of the screen. Now press A as fast as you can. Every 10 pressings will give you one extra continues up to 29 maximum. You have only 29 seconds.

Bust-A-Move 3 DX

(GEN) Extra puzzles (added 05.08.16):
At the title screen, press A, Up, B, Down, Up, Left, B, Right. A small character will appear at the bottom-right corner of the screen. This cheat is unlockable after completing the regular puzzle mode of the game.

(UNI) Extra continues (added 05.08.16):
Enter Options menu, put cursor to the Credits option, then press Left, Right, Left, Right, B, A, A, B, Right, Left, Right, Left. A small countdown timer will appear at the top-right corner of the screen. Now press A as fast as you can. Every 10 pressings will give you one extra continues up to 29 maximum. You have only 29 seconds.

Ca Da

(UNI) Sound test (added 22.07.16):
At the title screen, press Down + B.

Cadillac II

(UNI) Pre-defined card stack (added 08.08.16):
In a single-player game, at the cards shuffling screen, quickly hold Up + A + Start before the shuffling animation is started, and release all the buttons after it started. This makes the cards stack be the same for any level.

Captain Tsubasa J

(GEN) Secret passwords (added 10.08.16):
HIDE-Hidden UFO mini-game.
Source: makainyumon.web.fc2.com

(BUR) Game genie (added 10.08.16):
622‑08F‑6EF-Debug mode enable. After boot up, you'll see a number representing one of the internal game handlers. Some of the game handlers are for debugging and can't be accessed during the game:
2 - Character expressions veiwer
9 - CHR data/tilemaps viewer (note, that only leftmost index used here, actual index should consist of two parts:
tile data index and bg map index in one hex value,
this screen however displays only decimal indexes so if idexes doesn't match, you will see rather garbage instead of an actual picture)
18 - Sound test
19 - Animations viewer
Press A to enter the selected game handler or press Start to return to the normal game.
642‑0EF‑6E7-Prototype mode enable. In this mode after playing one round in any mode the game will show you an advertise screen, then return to the title screen.

Captain Tsubasa VS

(GEN) Secret passwords (added 16.08.16):
The only way to play VS CPU game is to write down one of two predefined passwords. The game itself doesn't have an option to show the password in this mode, so this is most likely were some kind of competition passwords available only in Japan.
もりさきもつかつてね-VS CPU mode regular team select.
すりいもでるのよ-VS CPU mode junior league team select.
Source: urawaza.in

Card Game

(FIX) Game select menu cheats (added 13.01.17):
All cheats must be entered at the game select menu in 1P mode. Hold Select, then enter Right, Down, Left, Up, Down (the common part of all cheats). Do not release Select, then complete the code with one of the sequences from the table below. Each cheat upon copleting the D-Pad buttons input will point to the corresponding game, so you automatically will start a corresponding game, which affects the code in question. Note, that cheats may be combined and will work until you reset the console.
Right, Start-Ending
Source: urawaza.in.
Right, Up, Left, Start-In a Poker game, now you can do discarding of your cards up to 5 times in row per single turn. Normally you can do it only once. Hold Select before completing the discard process to skip to the next turn instantly.
Right, Up, Start-In a Black Jack game doubles any payout even if you has a draw.
Start-In a U.S.A game, then players hand has only one card, this prevents from "skip", so you will have one card always during the CPUs turns.

Castelian (USA, Europe), Kyorochan Land(Japan)

European version:

(UNI) Infinite timer (added 17.08.16):
Before powering the console, hold Down + B. At the title screen, release all buttons and hold Up + Right + A, then press Start. This cheat didn't present in other game versions.

Japanese version:

(GEN) Secret passwords (added 17.08.16):
At the title screen, press B to enter the password screen, now input one of these passwords to access the desired level. The passwords are given to you after completing the corresponding stage, so they aren't secret actually, but there is no password systems in any other versions of the game.
TRF-Stage 2
GZB-Stage 3
PKW-Stage 4
HQJ-Stage 5
BLV-Stage 6
WPT-Stage 7
RPR-Stage 8

Castle Quest

(FIX) Secret words (added 18.08.16):
Use one of these words as a player name in the Quest mode.
URAMEN-Secret quest mode Castle 26.
HODRACH-Ending.
Source: tcrf.net

Castlevania II - Belmont's Revenge (USA), Dracula Densetsu II (Japan)

(FIX) Secret passwords (added 19.08.16):
There are three secret passwords in this game: for Last Boss battle, for Sound test and for Extra lives. The rest are provided by the game when selecting the password option on the continue screen, including two parts of the Dracula's castle. When you beat game once, the hard mode flag is raised and the second quest will be started automatically. While playing the second quest, only the hard mode password will be displayed for any stage. Note, that 0 means "Empty" slot, 1 - "Orb", 2 - "Candle" and 3 - "Heart".
0,2,3,3-No Castles Completed
1,2,3,2-Plant Castle Completed
2,3,3,1-Crystal Castle Completed
3,3,3,0-Plant, Crystal Castles Completed
0,0,0,3-Cloud Castle Beaten
1,0,0,2-Plant, Cloud Castles Completed
2,1,0,1-Crystal, Cloud Castles Completed
3,1,0,0-Plant, Crystal, Cloud Castles Completed
0,2,1,3-Rock Castle Completed
1,2,1,2-Rock, Plant Castle Completed
2,3,1,1-Rock, Crystal Castles Completed
3,3,1,0-Rock, Plant, Crystal Castles Completed
0,0,2,3-Rock, Cloud Castles Completed
1,0,2,2-Rock, Cloud, Plant Castles Completed
2,1,2,1-Rock, Cloud, Crystal Castles Completed
3,1,2,0-Dracula Castle Part One (Rock, Cloud, Crystal, Plant, Castles Completed)
3,2,1,1-Dracula Castle Part Two
0,1,0,1-Hard Mode
1,3,2,1-Last Boss
3,3,3,3-Sound Test
2,2,3,3-Extra 10 Lives
Source: gamefaqs.com

(BUR) Game genie (added 20.08.16):
00A‑30F‑C4D-Re-enables the debug cheat. During the game, on pause, press Down to restore full health bar instantly.
0B6‑15A‑C42 (for the Japanese version)
0B6‑24A‑C42 (for the US version)
-Add additional music track to the sound test, disabled in the final versions for some unknown reason.

Catrap (USA), Pitman (Japan)

(GEN) Sound test (added 20.08.16):
Immediately after the console's boot up, before the title screen appears, hold Down + Left + A + B + Select. This will add an "BGM" option to the pause menu, which allows you to select the backround music.
Source: makainyumon.web.fc2.com

(FIX) Level skip (added 20.08.16):
Any time during the game, hold Start, then press Select. Release all buttons, unpause the game and just wait for a few seconds to stage being completed. If you do this cheat being in the pause mode, there is no need to unpause then.
Source: gamefaqs.com

Cave Noire

(GEN) Results tables (added 22.08.16):
At the title menu, hold Left + Start, then press B. The tables displays a maximum numbers of goals completed and enemies killed for every level in every quest.
Source: urawaza.in

Chachamaru Panic

(FIX) Cheat sequences (added 22.08.16):
All sequences should be entered at the title screen, to activate, press Start.
Down, Up, Left, A, B, Select-Round select.
Select, Select, Select, Select, Select-Play Bonus game, then exit to the title screen.
A, A, A, A, A, B, B, B, B, B, Up, Up, Up, Up, Up-Extra 9 lives.
A, B, A, B, A, B, A, B, A, B-Speed-up at the beginning.
Source: makainyumon.web.fc2.com

Chachamaru Boukenki 3 - Abyss no Tou

(GEN) Ending (added 23.08.16):
At the title screen, press B, Select, Up, Up, Select, Down, Down, A.
Source: makainyumon.web.fc2.com

(FIX) Ingame cheat sequences (added 23.08.16):
During the game, press Select to open the floor number information window, then enter one of these codes. All codes may be combined and can be used multiple times.
Up, Down, Start, Right, Start, Right, Left, A-Monster viewer.
Up, Start, Right, Down, Left, Start, Down, A-Sound test.
Up, Down, Left, Right, Start, Right, Down, A-Max level, 34000 exp.
Up, Right, Right, Left, Start, Start, Left, A-Super quipment.
Up, Left, Down, Start, Left, Start, Right, A-Unlimited food.
Source: makainyumon.web.fc2.com

(BUR) Game genie (added 23.08.16):
3D4‑DAE‑F73-Replaces the ingame cheat for Unlimited food with the Free walk mode toggle. Enter corresponding cheat once to enable it, then one more time to disable.

Chalvo 55 - Super Puzzle Action

(UNI) Sound test (added 23.08.16):
Start a new game, at the last scene of the intro with mechanic and its robot, press Up, Up, Right, Right, Down, Down, Left, Left.

(GEN) Secret passwords (added 23.08.16):
SPCLST-Start a Special Stage 9 with 50 lives.
JSSJSS-Start with 50 lives
Source: gamefaqs.com

Championship Pool

(GEN) Secret warp (added 24.08.16):
To skip the Regional Qualify and warp directly to the World Chapmionship, score 140 or lower seconds at the first round of the Speed Pool Challenge game, then start the Tournament. This cheat is unlockable and will be given to you when you complete the Regional Qualify.
Source: gamefaqs.com

(BUR) GameGenie (added 24.08.16):
C81‑27C‑E68+6C1‑2CC‑5D3-Access to unused or maybe unfinished "cheat" menu. Only the resources for the display are present, there is no code to call it properly and do anything.

Chessmaster, The (Early Japan, USA), New Chessmaster (Later Japan, USA, Europe)

(BUR) Hidden text (added 28.08.16):
There is an unused copyright scring at 0x008000 in all versions of the game's ROMs:
(c)1985Kittinger
Also, the US version of the New Chessmaster has an additional credits at the end of the ROM:
PROGRAMMED
BY CRAIG B.
SEASTROM
LAST MOD.
10/11/90
for Ver 1.0, and
PROGRAMMED
BY CRAIG B.
SEASTROM
LAST MOD.
07/24/91
for Ver 1.1.
Source: tcrf.net

Chibi Maruko-chan 2 - Deluxe Maruko World

(UNI) Secret passwords (added 29.08.16):
らんらんらららん-Sound test.

Chibi Maruko-chan 3 - Mezase! Game Taishou no Maki

(GEN) Sound test (added 30.08.16):
At the title screen, open the Mini-games selection menu (third option), then just press Start.
Source: urawaza.in

Chiki Chiki Machine Mou Race

(UNI) Stage select (added 30.08.16):
Hold Down + Right before the stage and position info screen appears either after starting a new game or selecting the continue option, a Stage select screen will appears instead.

(UNI) Easter egg (added 30.08.16):
Start a new game, at the car selection screen press Up, Up, Down, Down, Left, Right, Left, Right, B, A to make all cars spinning instead of standing still.

Chikyuu Kaihou Gun ZAS

(GEN) Extra 6 continues (added 31.08.16):
At the title screen, hold A + B, then press Select 60 times. A sound will confirm code triggering. From now you'll have 6 continues instead of 3.
Source: makainyumon.web.fc2.com

(UNI) Easter egg (added 31.08.16):
Press Left/Right during the staff roll sequense after beating the game to change the rotation direction of the background stars.

Choplifter III

(UNI) Secret passwords (added 01.09.16):
When one of these passwords is accepted, the game returns to the game selection menu. Now you can either start a new game or enter the password screen again and input any regular password. You can input another secret password as well, but effects aren't combined, however it's permanent.
ZZZZZZB-Extra 6 lives.
RTDFKLN-Extra 8 lives.
LTSFBMB-Unlimited instant Rescue rope ("R") item.

Chuck Rock

(BUR) Hidden text (added 01.09.16):
There is a hidden copyright string at 0x000150 in the ROM:
COPYRIGHT SPIDERSOFT 1992


Chuugaku Eijukugo 350

(BUR) Hidden text (added 01.09.16):
There is a hidden copyright sctring at 0x000061 in the ROM:
1997 May. complete.Making by C-lab.co.,ltd.


Chuugaku Eitango 1700

(BUR) Hidden text (added 01.09.16):
There is a hidden copyright sctring at 0x000061 in the ROM:
1997 April. complete.Making by C-lab.co.,ltd.


Cliffhanger

(BUR) Hidden text (added 01.09.16):
There is a hidden copyright string at 0x000150 in the ROM:
COPYRIGHT SPIDERSOFT 1993


Collection Pocket

(UNI) Shot-em-up stage skip (added 02.09.16):
Start to play any shot-em-up style game, when message "STAGE XX" is appear on the screen, hold A + Select and wait until it changes to "STAGE XX CLEAR".

(BUR) Hidden text (added 02.09.16):
The random number generator in this game initializing with an ASCII string: "STAR".

College Slam

(UNI) Secret teams (added 03.09.16):
Both cheats should be entered at the title screen. A sound will confirm correct code entry. Each cheat will disable another one when triggered, so you can have only one enabled at once.
Hold B, wait for 5 seconds, then press A-Two extra teams: Acclaim (White Team) and Torus (Cavemen).
Hold A, wait for 5 seconds, then press B-Seven extra Fraternity teams.

(UNI) Max team points (added 03.09.16):
At the main menu, enter "GAME OPTIONS", then "EDIT TEAM". Select any team, then at the "EDIT STATS" screen put cursor to the "Exit" option and press B, A, Down, Right, A, Down, Up, A, Down. This will temporarily set MAX points for all members of currently selected team to 60. When you re-enter this screen once again all MAX values will be restored, but all points assigned to any team member previously will be saved.

(UNI) Tonight's match-up screen cheats (added 03.09.16):
All these cheats can be entered at the Tonight's Match-up screen in any regular game mode except "PRACTICE" (which is haven't it). All of them affects only the current match and used for adjusting game-play mechanics (similar to all other ports of this game to many platforms). You can input only one cheat at once and have no retries, so if you make a mistake, you can try again only the next round. Upon entering the sequence, press Start to accept it and begin a game. A sound will confirm correct code entry. Additionally, at the beginning of the round a small message will appear at the bottom of the screen with a short name of used cheat (except two, see below).
Down, B, Up, Up, Down-Shot percentage display at the bottom of the screen. The only correct cheat for this game from the gamefaqs.com. The rest are just trash.
A, Right, Left, Left, Left, Left-Quick hand
B, Right, Right, Right, Left, Right, B-Max power
Down, Up, Right, Up, Down, Right-Goaltend
A, Left, Down, Right, Right, B-Always on Fire
Up, Left, B, B, B, A, Down, Down-Turbo
Up, Down, A, B, Up, A, B-Offence
Down, Up, Up, Down, Left, Right, Left-Always do 3-pts shots
B, A, Left, Right, A, B-Ultra jam
Right, Down, Down, Right, A, B, A-Unknown (displays only "Push")
A, A, Up, Up, Up, Up, Left, Left, Left, Left-Unknown (displays only "Push")
A, B, Up, Up, Up, Up, Left, Left, Left, Left-Unknown (displays only "Push")
Right, Right, A, A, A, A, A, Right, Right, Right-Unknown (displays nothing)
A, Down, Up, Down, Up, Down, Right, Up, A, A, A-Unknown (displays nothing)
Right, A, Down, B, A, Left, Left-Show time

Chou Mashin Eiyuu Den Wataru: Mazekko Monster 2

(UNI) Cheat sequenses (added 23.11.16):
All these cheat sequenses should be entered right after the main game title being positioned in the middle of the screen during the starting the title screen animation, but before the "PUSH START" message appears. You'll hear a sound for every 3-button nibble. Also note, that you can enable this cheat if there is a valid save data present in the battery backed RAM, so first you should play this game and save it at least once.
A, Select, Select-Unlock all food and items information in your pocket library.
A, Select, Select, A, Select, Select-Previous effect and additional unlock all field locations.
A, Select, Select, A, Select, Select, A, Select, Select-Both previous effects and additionally unlock all monsters information and raise flag for both endings.

(UNI) Secret words (added 23.11.16):
Enter one of the following words as a player name.
ひろいおうじ-Start a new game with 8th storage bottle filled with "タマプー" creatures.
みえるんです-During the game in the field mode (where the creatures are living), press Select to see statistics on all creatures on current field. Also, you can reset the console and return back to the title screen, then press Select to enter the Creatures Viewer, allowing you to see all the creatures and all its animations.
A・ユニット-Start a new game with 8th storage bottle filled with "ドラカイザー", "ドランドー", "ユノドーラ", "ドラビューン" and "パルドラピ" creatures, 2 of a kind.
みやび-Start with all 16 items, 10 of a kind.

(BUR) Game genie (added 22.11.16):
130‑9EB‑E62-Enter the Routine Test mode after the Banpresto Logo. Use the D-Pad buttons to select any of the game main handlers and run it with Start.

Contra (Japan), Operation C (USA), Probotector (Europe)

(FIX) Cheat sequenses (added 24.11.16):
All cheat sequenses should be entered at the title screen, when title animation is over.
Up, Down, Left, Right, Start-Sound test (all versions)
Up, Up, Down, Down, Left, Right, Left, Right, B, A, B, A, Start-Stage select (the US and the European versions), Extra 9 lives (the Japanese version, the Stage select is enabled here by default)
Up, Up, Up, Up, Down, Down, Down, Down, Left, Left, Left, Left, Start-Extra 9 lives (the US and the European versions only)
Source: gamefaqs.com

(BUR) Game genie (added 24.11.16):
00A‑EBF‑C4D-Re-enables the simple sprite viewer. Just press Start during the game and press A/B to cycle through all possible ingame sprites at the player's position.

Contra - The Alien Wars (USA), Contra Spirits (Japan), Probotector 2 (Europe)

(FIX) Secret passwords (added 24.11.16):
When enter one of the secret password you'll hear a special sound and return back to the Konami logo automatically. The effects can be combined, just enther the "PASSWORD" option again and input another password.
B32R-Infinite lives.
Source: gamefaqs.com
P3LS-At the title screen, start a new game to see an Ending.
H2F2-Press Start during the game to complete current level instantly.
Source: gamefaqs.com
M1LZ-Allows you to play past Level 3 on Easy mode.
K4RN-Reverse the D-Pad buttons during the game.

(BUR) Invulnerability (added 25.11.16):
The secret passwords in this game uses RAM variable $C1E4 to store its flags. Bits 0-4 of this variable corresponds to the secret passwords in the same order as in the table above. But the game uses additional bit 5 as invulnerability flag, which is can't be set during the game and seems just a leftover from the developement stage or were planned to be enabled with additional sixth secret password as well. You can set it manually using the cheat codes, just write $20 to $C1E4. Note, the only enemy able to damage you is the flying enemies in Level 3 which grabs you and fly out of the screen.

Cool Ball

(UNI) Secret passwords (added 25.11.16):
1NDRQLLQ-Extra 99 Water, 99 Hammers and 99 Keys, Infinite lives and Stage select (in the pause mode press Up/Down).

Cool Spot

(GEN) Stage select (added 28.11.16):
At the title screen, press Right, Right, Right, Left, Left, Left, Right, Left. During the game, press Start then hold Select and press Start again.
Source: gamefaqs.com

Cool World

(UNI) Cheat mode (added 28.11.16):
At the title screen, hold Up, then press A + B 8 times. A sound will confirm cheat triggering. Input this code one more time to switch this cheat off. When enabled, at the title screen, hold Down + A and press B to select the starting level. Also this code grants you the infinite lives during the game.

Cosmo Tank

(FIX) Sound test (added 11.11.16):
During the quest mode game, press Start to pause it, then hold Down + A + B and press Start again.
Source: urawaza.in

Crayon Shin-Chan - Ora to Shiro-ha O-Tomodachi Daiyou

(BUR) Game genie (added 28.11.16):
6C1‑54E‑A2B+111‑55E‑E6E-Any time during the game, use the regular soft-reset code (A + B + Select + Start) to enter the debug menu. You can select the starting level, enabe the invulnerability, increase the lives counter up to 63, as well as listen to the game music and the sounds. The "てき" flag never used in game, so does nothing. Exit this menu to the title screen and begin a new game to apply changes.

Crayon Shin-Chan 2 - Ora to Wanpakku Gokko Dazou

(BUR) Game genie (added 30.11.16):
A8E‑90F‑A2B+0EE‑90F‑E6E-Any time during the game, use the regular soft-reset code (A + B + Select + Start) to enter the debug menu mostly exactly the same as in Part 1. You can select the starting level, enabe the invulnerability, increase the lives counter up to 63, as well as listen to the game music and the sounds. Instead of unused "てき" flag, here is "サブ" can be enabled and havily used during the game (investigate).

Crayon Shin-Chan 3 - Ora no Gokigen Athletic

(GEN) Extra mini-game (added 03.11.16):
At the title screen, press Up, B, Right, B, Down, B, Left, B. A sound confirm correct code input. This will add an extra 10th mini-game "ACTIONMASK VS SHINCHAN" to the mini-games menu. Normally this mini-game can be unlocked after the final credits if all 9 mini-games are beaten.
Source: urawaza.in

Crayon Shin-Chan 4 - Ora no Itazura Dai Henshin, Super Mario 4 (Pirate)

(UNI) Secret passwords (added 14.12.16):
かみしばい-Test mode screen. Allows you to see all conversations, level intros, both endings and play minigames between stages.

(BUR) Game genie (added 14.12.16):
003‑57B‑F7A-At the title screen, start a new game to enter the Debug menu instead. Allows you to play any level from the beginning or from the midpoint, select amount of lives, items to carry, as well as to enable invulnerability. Also you can listen to all music and game sounds. Note, there are no numbers displayed because of lack of the proper font in the title screen CHR data, however they are selectable by pressing Left/Right anyway.

Crystal Quest

(UNI) Secret options (added 21.12.16):
There a few secret options that can be accessed via the secret button codes listed in the table below. All must be entered at the title screen. You could have only one option at a time before the game. But enabled options are kept permanently even after the game over.
Up, Up, Up, Down, Down, Down, Left, Right-Starting Wave select (up to 40).
Left, Right, Left, Right, Up, Down-Shot mode select.
Down, Down, Down, Up, Up, Up, Left, Right-Ship speed select.

(UNI) Continue (added 21.12.16):
When the game over message is displayed, press Down + Select + Start.

Cutthroat Island

(BUR) Game genie (added 12.01.17):
511‑9BF‑196-Replaces the title screen with the Demo Mode screen, where you can select any level to play and enable some debugging display during the game.
Source: tcrf.net

Daedalian Opus (USA), Puzzle Road (Japan)

All versions:

(GEN) Secret passwords (added 17.01.17):
ZEAL-Stage select
Source: gamefaqs.com

US version:

(BUR) Game genie (added 17.01.17):
621‑5FF‑3B3+081‑60F‑2A2-With this code, at the title screen, enter the PASSWORD option to see some kind of very simple drawing mode instead. The background is filled with a brick wall tiles by default. Hold A, then use the D-Pad buttons to draw with black tile, hold B and also use the D-Pad buttons to erase black tiles. There is no such code in the Japanese version at all.

Daffy Duck - The Marvin Missions

(GEN) Super stage (added 17.01.17):
Step on the cart right at the beginning of the first level. This makes Daffy acquire a lot of speed as long as he doesn't touch the ground. If you manage to reach the end of the room at high speed, instead of loading the next room, the game will show a black screen with the text "Super stage" and you can play through a new set of levels.
Source: gamefaqs.com

(FIX) Pause cheats (added 17.01.17):
Pause the game, then enter one of the following button sequences to get the corresponding effect. Note, every cheat costs you 10 points, which is given during the game for defeating enemies. However, the jetpack refill cheat will only work if you have at least 20 points. To restore to the default weapon and reset all cheat counters, also on pause, press Select.
Code|Effect|At bosses?|Mode
Up, Up|Laser weapon|No|Any
Left, Left|Bounce weapon|No|Any
Right, Right|Autofire weapon.|No|Any
Down, Down|Wall break weapon.|No|Any
B, B|Refill health bar.|Yes|Any
A, A|Refill jetpack.|Yes|Super stage only
Source: gamefaqs.com

(FIX) Secret passwords (added 17.01.17):
This is not quite a secret passwords list. The passwords system in this game is very lame. Although the game gives always the same passwords, you can use any other numbers with just one condition: the sum of the numbers in password should match the particular stage requirement. The complete list of sums you can see in the table below. For example, the stage 3 sum is 11, the default password is 04070 (4+7=11), but you can use any of these: 13070, 12161, 90002, etc...
Sum = 20-Stage 1
Sum = 17-Stage 2
Sum = 11-Stage 3
Sum = 22-Stage 4
Source: gamefaqs.com

Daiku no Gen-san - Robot Tekikoku no Yabou

(UNI) Cheat mode (added 22.04.17):
To enable the cheat mode, at the title screen, press Up, A, Down, B, Left, Right, Left, Right, B, A. A sound will confirm correct code entry. There are several options available now.
At the title screen, press and hold Start. While holding it, wait for the "PUSH START" message stops to fade in and out, then press B button a number of times corresponding to the Stage or substage number including bosses, up to 13. Every time you press the B you'll hear a sound. Release, Start to begin the game from the selected Stage.
During the game, press and hold Start. While holding it, wait for the pause jingle is over, then enter one of the sequences from the table below to get the corresponding effect. Every time you press the correct button, you'll hear the same sound effect as on the title screen when cheat is activated.
Also, you can use now Select to freeze the game as an alternative to the pause mode.
Right, Left, Right, Left, Down, Down, Up, Up, A, B-Refill lives.
Up, Down, Up, Down-Instant Game over.

(BUR) Hidden text (added 22.04.17):
There is a version string at the beginning of the sound engine in the very first bank of the ROM:
** Ver 6.04 **


Darkwing Duck

(BUR) Game genie (added 19.01.17):
C88‑B68‑F79-Re-enables the Stage select screen. To access it, just press Start at the title screen. The Stage select screen meant to be accessed via button sequence code Up, Down, Right, Left, A, B, Select at the title screen. The sequence check routine still present in the ROM at 07:78D1, but there are no script commands to call it, as well as there are no references to the unused portion of the title screen script, which selects the Stage select mode.

Daruman Busters

(UNI) End level (added 20.01.17):
At the game setup screen in 1P mode, press B at least 150 times (but not much than 255). Now press Select to change the starting level up to END, the final level, which is normally can't be selected.

(BUR) Game genie (added 20.01.17):
80F‑FFC‑E6A-Re-enables a debug leftovers. Now, any time during the game press Left + Select to hold the game on pause without cleaning the screen, press any button to return to normal state. Additionally, you can select the END level at the game setup screen without cheat.

Days of Thunder

(BUR) Game genie (added 20.01.17):
00A‑04F‑E6E-Start a new game and select any game mode to get to players number selection screen, which is presumable should be started before the main menu selection. The code doesn't allow you to play the 1-player mode from there, but you still can run rather unfinished 2-player mode if use the link cable with two Game Boys. There are a lot of issues with this mode, some wrong positioned texts on the screen, you can't change the car color or player name. You able to select the course and play it somehow, but it mostly playable. The 4-player mode need some device, but even if you have it, you can't play this mode. It's quite in a basic state and working only as the 4-player hardware checking and players ready status display. The rest of the code doesn't connected even to this code at all, and has no any texts or screen layouts.

Dead Heat Scramble

(GEN) Stage select (added 21.01.17):
At the title screen, put cursor to the "1 PLAYER" option, press B 8 times, then A 8 times. Now, press B to cycle between levels 1 to 10. Press Start to begin a new game from the selected level.
Source: gamefaqs.com

Dennis the Menace (USA), Dennis (Europe)

(BUR) Hidden text (added 23.01.17):
There is a hidden version string in the ROMs of both regional versions at $0063 offset:
Version 1.0Time 12:46:27Date 09.20.93
for the US version, and
Version 1.0Time 12:47:19Date 09.20.93
for the European version.
Source: tcrf.net

(BUR) Game genie (added 23.01.17):
011‑58F‑E6A-Re-enables the Stage select screen right before the game starts.
Source: tcrf.net

Desert Strike - Return to the Gulf

(GEN) Secret passwords (added 23.01.17):
BQQBZH-A message "HELLO, LITTLE OLD LADY" will appear. This will give an extra 10 lives instead of 3 at the game start.
Source: tcrf.net

(BUR) Hidden text (added 23.01.17):
There is an unused string at $45A5 in ROM:
GO FOR SOUND
which is most probably the only leftover from planned or removed Sound test mode.

Dexterity (USA), Funny Field (Japan)

(UNI) Stage select (added 24.01.17):
Start a new game, select the game type and BGM music, before pressing Start, hold one of the following combinations to start from the corresponding stage.
Up + Left + B-Round 11 (Single mode), Round 1 (Multi mode)
Up + Right + B-Round 21 (Single mode), Round 2 (Multi mode)
Down + Right + B-Round 29 (Single mode), Round 3 (Multi mode)

Dick Tracy

(GEN) Secret passwords (added 24.01.17):
47214-Enables the Debug mode. There is no any indication when you enter this pass correctly. But now, during the game:
Press Up + Select + Start to toggle invulnerability.
Press A + Select + Start to skip to the next stage.
Press B + Select + Start to deduce one continue without any indication as well.
Also you can see the player's coordinates at the bottom-left corner of the pause screen.
Source: tcrf.net

Dino Breeder 2

(BUR) Game genie (added 26.01.17):
FA2‑AAF‑E65-Re-enables the Stage select at the beginning of the game. Hold Select before the main game field appears either after the creating the new game or continuing the saved one.
The screen will stay white and will wait for some input.
Press B to cycle between 20 available starting stages, press Left + B to set the maximum stage number.
Press Start to begin the game.
Any time you press a buttou you'll hear a corresponding sound.
FA3‑BCE‑E65-During the game, press Up + Left + Select to grow the Dino up to the next level.
FA1‑ABD‑E65-Pause the game with Start, then press Select. The effect is exactly the same as for the previous code.
FA2‑DFB‑E65-At the save game selection screen, hold B + Select and enter the Enemies library to fill it with complete set of records.
FA6‑349‑E65-The same as previous with the same button code, but for the New creatures library.
FA6‑F09‑E65-Additionally for the New creatures library select any entry, press Up + Select or Down + Select to fill or erase corresponding creature record.

Disney's Mulan

(BUR) Game genie (added 27.01.17):
041‑F2B‑E66+042‑00B‑E66-Allows to select an extra 4th option in the Options menu, which happens to be glitched and seems unfinished Sound test mode.Press Left/Right to select the sound effects, there is no music selection in this code.
Press B to play it.
Effects can't be stopped, which may cause the problems and more glitches. There is no text for menu option, but the ROM contains a table with set of text resources for displaying numbers from 0 to 39, which is a number of possible selectable sound effects in working code.

Dodge Boy

(UNI) Secret passwords (added 28.01.17):
NIKNO-Ending.
MAKYU-A special match. Your team is Australia and you already beat the China, now is the match against USA. This cheat uses the regular pass "ET9RG" for setup the game, but raises the special flag, which meaning isn't checked carefully, but seems it enables all power throws during the match.

Donkey Kong

(GEN) Data all clear (added 01.02.17):
At the Select File screen, press B + Select + Start + Left to enable the "DATA ALL CLEAR" menu which allows you to erase all saved files at once.

Donkey Kong Land (USA), Super Donkey Kong GB (Japan)

(BUR) Hidden text (added 01.02.17):
There are a lot of unused hidden copyright sctings spreaded through the ROM:
* By Paul Machacek / RARE LTD *
and
*By  Paul Machacek*
in both regional versions, and
PAULMACHACEK
only in the US version.
Source: tcrf.net

Donkey Kong Land 2 (USA), Donkey Kong Land (Japan)

All versions:

(FIX) Stage quit (added 02.02.17):
To exit any time from already completed stages, pause the game then Select.
Source: gamefaqs.com

US version:

(GEN) Save screen cheats (added 02.02.17):
At the Save game selection screen, hold Left or Right, then enter one of the following button sequences. The codes may be combined. A sound will confirm correct code entry. Although the Japanese version has this cheat disabled, the code and flags are still working there. While at the Save game selection screen, set the lower three bits of RAM variable $FFF9 to raise corresponding flags, then start a game.
A, A, B, B-Extra 50 lives
B, B, A, A-Extra 40 Banana Coins
A, B, A, B-Extra 47 Kremkoins
Source: gamefaqs.com

Donkey Kong Land III

(GEN) Title screen cheats (added 03.02.17):
All cheats are for the title screen. Enter one of the sequences from the table below, then press Right to finish the code input, a sound will confirm correct code entry. Codes can be combined.
Up, Up, Down, Left-Matching Card Game
Down, Down, Up, Left-Extra 50 Lives
Up, Down, Left, Left, Down, Up-Unlock all levels
Source: gamefaqs.com

Doraemon

(FIX) Secret passwords (added 03.02.17):
むてき-Invulnerability. However, you still can die at some obstacles, like pits.
Source: imasaragame.com
へいき-Weapon select. Press Select any time during the game. Note, in the overworld mode the same button shows the map as well, so you need to press Select twice in row.
さかた-Weapon select and Stage skip. To skip the stage, pause the game then press Select for the overworld stages or A for other game events.
ももこ-Invulnerability, Weapon select and Stage select. Additionally all cutscene messages are skipped automatically. You only be able to press A to exit from the cutscene mode.
Source: imasaragame.com

Doraemon 2

(GEN) Sound test (added 04.02.17):
One of the items that hidden in the River stage of the game called "MINI KARAOKE SET" and when used start a Sound test mode.
Thanks Yamada_Arthur for info.
Source: imasaragame.com

(GEN) Secret passwords (added 04.02.17):
むてきになります-Invulnerability. Note, the game need 10 letters in password, so you must fill last two positions with any letters. A sound will confirm correct code entry.
Source: makainyumon.web.fc2.com

Doraemon Kart

(FIX) Unlockables (added 06.02.17):
Complete the Story mode once with any character-Unlock Extra sixth character Dorami-chan as well as Extra three Momoko's courses.
Complete the Story mode twice with any character-Unlock a Free course mode. All character's courses of all levels are available to play at once and now you can select any character before playing any course. This also unlocks an Extra Doraemon-shaped course.
Source: gamefaqs.com

(UNI) Save erase (added 06.02.17):
Hold A + B + Down, then power on the console. A sound will confirm correct code entry. Your current saved game will be earased.

(GEN) Ending cheats (added 06.02.17):
Unlock Free course mode as described above. Now, complete all the courses including the Momoko's courses and the Doraemon-shaped course (19 in total). If done right, there are two cheats will be enabled at the title screen. Hold one of the following combinations to get the corresponding effect.
Down + Left + B-See Ending 1
Up + Left + B-See Ending 2
Source: urawaza.in

Doraemon no Study Boy 5 - Shou 2 Sansuu Keisan

(UNI) Debug leftovers (added 07.02.17):
There is a debugging feature left in the release version of this education program. To enable it, hold A or B or both, then power the console on. This feature should work mostly as auto solver for exercises upon pressing A. However, it seems they just forgot to remove it at some point of developement, then made some changes incompatible with the old debugging code. As a result, when used in the release version, it causes a lot of problems like garbled graphics and even hanging the console.

Double Dragon

(BUR) Game genie (added 08.02.17):
043‑76F‑E6A-Re-enables simple Stage skip feature. During the game press Select to instantly complete current stage.

Double Dragon II (USA), Nekketsu Kouha Kunio-Kun - Bangai Rantou-Hen (Japan)

(BUR) Game genie (added 08.02.17):
00A‑92F‑E66 (for the US version only)-The US version of this game has two intro cutscene frames with blood and killing, obviously removed due to censorship. Both still sitting in ROM and can be accessed with this code.
Source: tcrf.net
30B‑769‑E6A (for the US version)
30A‑509‑E6A (for the Japanese version)
-Re-enables additional finishing move after foot-kick from the close range (the B button). In the release version there is no difference wether you hold Left or Right during the kick or not. This code adding the difference to kicks with Left/Right held. It will do grip and throwing move instead of high jump with kick.

Double Yakuman

(GEN) Credits (added 10.02.17):
At the title screen, hold either Left or Right, then press B.
Source: urawaza.in

(UNI) Tile fetch editor (added 11.02.17):
At the title screen, enter the Credits screen as described in section above exactly 3 times, then start a "1-PLAYER" game. During the game, before the tile is fetched, press Start to enter the Tile fetch editor. There are 16 numbers will be displayed on the screen. Use D-Pad button to select any of them, and A/B button to increase/decrease them. The numbers represents the custom tiles queue, which will be used first to select the next tile. Note, you can't see the other player's hand, so you may choose tiles already fetched, they won't be tossed to you obviously, the regular tile fetching procedure will be used instead. To be able to use the same cheat in "SIMPLE MODE", you must enter the Credits screen 254 times instead.

(UNI) Tile fetch cheat for 2-players mode (added 11.02.17):
At the title screen, enter the Credits screen as described in section above exactly 255 times, then start a "2-PLAYERS" game. It somehow will adjust the tile fetching as well, but need to investigate what exactly it does.

(UNI) Secret pictures (added 10.02.17):
Play the "MAHJONG HOUSE" mode of the "1-PLAYER" game. Select either Maririn or Inajima Oryuu as opponent. Finish match with positive points. At the match results screen enter Up, Down, Left, Right, B. The default message of the opponent will change and the face animation of the character will stop. Now, press any button to advance to the secret picture of particular girl.

(BUR) Special secret picture (added 10.02.17):
There is one more much complicated cheat sequence exists in this game (Up, Down, Left, Right, Up, Up + A, Down, Down + A, Left, Left + A, Right, Right + A, B, A + B, Right, Right + A, Right + A + Select, Left, Left + A, Left + A + Select, Down, Down + A, Down + A + Select, Up, Up + A, Up + A + Select, B, A + B, A + B + Select). It should be entered at the Inajima Oryuu's secret picture. If done right, the breasts area of the girl will be replaced with some patch, but the patch data exactly the same as used in the original picture, so nothing is changes. Most probably, they planned to add some nudity or the original pictire were different, but in the release version there is no point to use this code at all. The only indication that this sequence is working, that the face animation of the girl will stop.

(BUR) Game genie (added 10.02.17):
FEF‑FFC‑E6A-Re-enables the Debug features. Most noticeable ones are:
The opponents tiles are now can be seen during the game.
The Tile fetch editor overwriting with more powerful memory viewer/editor. The corersponding cheat at the title screen also disabled, memory view now availableany time by pressing Start.
The tile fetching procedure becomes trivial. The game will just select the tiles in its order in a stack.
Adds a new shortcut for "2-PLAYERS" cheat, described above. Instead of entering the Credits screen 255 times, you just need to enter it 4 times at the title screen, then start the "2-PLAYERS" mode.
000‑00B‑C4D-Additionally to the code above, this one adds some debugging display during the game match at the top-right corned of the screen, under the opponent's tiles. There is not clear what it means, but holding Up, then pressing Left or Right during the game sometimes will reveal some changing values there.

Double Yakuman 2

(GEN) Credits (added 10.02.17):
At the title screen, hold either Left or Right, then press B.
Source: urawaza.in

(GEN) Alt game field type (added 10.02.17):
At the title screen, hold either Left or Right, then press A or Start to begin the game. This will start the game with a different field type. Also, you can switch between two different field types during the game if hold Up, then press Start.

(UNI) Tile fetch editor (added 11.02.17):
At the title screen, enter the Credits screen as described in section above exactly 11 times, then choose the "OPTION START" mode. During the game, before the tile is fetched, hold Down, then press Start to enter the Tile fetch editor, exactly the same as in the first part of this game (see above). To be able to use the same cheat in "QUICK START" mode, you must enter the Credits screen 254 times instead.

(UNI) Tile fetch cheat for 2-players mode (added 11.02.17):
At the title screen, enter the Credits screen as described in section above exactly 255 times, then start a "2-PLAYERS" game. It somehow will adjust the tile fetching as well, but need to investigate what exactly it does.

(BUR) Game genie (added 10.02.17):
FEF‑FFC‑E6A-Re-enables the Debug features. Most noticeable ones are:
The opponents tiles are now can be seen during the game if the side-by-side field type is selected.
The Tile fetch editor overwriting with more powerful memory viewer/editor. The corersponding cheat at the title screen also disabled, memory view now available any time if you hold Down, then press Start.
The tile fetching procedure becomes trivial. The game will just select the tiles in its order in a stack.
Adds a new shortcut for "2-PLAYERS" cheat, described above. Instead of entering the Credits screen 255 times, you just need to enter it 4 times at the title screen, then start the "2-PLAYERS" mode.

Double Yakuman Jr.

(BUR) Game genie (added 10.02.17):
FEF‑FFC‑E6A-Re-enables the Debug features, exactly the same as in the non-junior version, but with the exception that the Tile fetch editor disabled here at all, although the code for enabling it still there.
041‑A0D‑E62-Also, the Junior version has the cheats for secret girl picture displaying removed. However, the picture and displaying code is still there exactly the same. Use this GG code, then play any match with Maririn to see its picture instead of the match results screen, or play any other opponent to see the Inajima Oryuu's picture as well.

Dragon Ball Z - Gokuu Gekitouden

(FIX) Mini-games (added 16.02.17):
Right before the title screen, while the opening text is scrolling up, enter Up, Down, Left, Right, Down, Up, Right, Left, then press any button to advance to the title screen, then one more button to skip to the title menu, where an additional item "MINIGAME" will appear. There are 4 mini-games are available, as well as "learning" room.
Source: urawaza.in, gamefaqs.com

(FIX) Secret passwords (added 16.02.17):
The password system in this game is available only for the "2P BATTLE" game in the SGB mode. It is used for some character parameters generation: AP/DP/SP/CP/BE and EE. There are two types of passwords, generated ones (you can get one of them when complete the game after the staff roll, which saves your current character's parameters), and a secret. Here is the list of the secret passwords.
FEDCBA9876543210-AP 99/DP 99/SP 99/CP 63/BE 42/EE 15
Source: urawaza.in, gamefaqs.com
1111111111111111-AP 00/DP 00/SP 00/CP 00/BE 00/EE 00
0123456789ABCDEF-AP 30/DP 30/SP 30/CP168/BE 97/EE 00

(UNI) Extra characters in tournament (added 17.02.17):
Select either the "1P TOURNAMENT" or "2P BATTLE" game mode, chose "NEW GAME" option, setup the game, then finally press A to begin the actual game. While the screen is white, quickly hold Up + A + Start and wait for the introduction. If done right, you can choose any character from the list, not only three main characters of the game.

(UNI) Exhibition menu (added 17.02.17):
During the game, on the way to Guru's, if you take a detour and head to the Namekian Village that's in ruins, you can play a Pushing Rock minigame there. It's not really important for the completing of the game itself, but serves another purpose. Beat all 8 stages of this minigame ("ド", "ラ", "ゴ", "ン", "バ", "ー", "ル" and "Z"), return back to the game, then hold Up + A and press Start to access the ingame menu. If done right, the menu will have one extra item ("てんらんかい" or "Exhibition") giving you the access to menu where you can view all battle and conversation pictures for all characters and listen to the music and sounds.

Dragon Slayer I

(GEN) Phase 2 warp (added 18.02.17):
At the title screen, press Up, Down, Left, Right, A. This code is unlockable and given to you after you clear PHASE 1.
Source: gamefaqs.com

Dragon Slayer Gaiden

(FIX) Secret names (added 20.02.17):
ほろぼろ-Change the main character appearance to Chicken-like bird "Horoboro".
Source: urawaza.in
あんデド-Extra 65535 of money at the beginning of the game.

(BUR) Hidden text (added 20.02.17):
The game uses string
ARGENT91
as SRAM initi signature.

Dropzone

(FIX) Cheat sequences (added 21.02.17):
All cheats should be entered at the title screen, after "DROPZONE ADVERSARIES" has been displayed. If entered correctly, the game will start immediately, so you couldn't use more than one cheat at once.
Up, Down, Right, Right, Left, Left, Up, Down-The Cloak timer 4 times slower.
Right, Left, Left, Right, Down, Left, Up, Right-Extra 25 lives and bombs.
Down, Left, Up, Down, Up, Down, Up, Left-Start on Wave 5.
Source: gamefaqs.com
Left, Left, Right, Down, Up, Left, Right, Down-Start on Wave 10.

Duck Tales 2

(BUR) Game genie (added 27.02.17):
0F7‑6FB‑C46-Re-enables the Stage select, exactly the same as in Darkwing Duck game. Both games shares the same scripting engine as well as the same unused disabled Stage select cheat routine and scripts.

Dungeonland

(BUR) Hidden text (added 01.03.17):
There is a hidden copyright scring inside the ROM:
(C) 1991 RANDOMHOUSE
Also, the SRAM init routine in this game uses following sctring as a signature:
RH-EX008


DX Bakenou Z

(UNI) Secret message (added 01.03.17):
Hold Start + A + B + Right, then power the console on. In the main menu, enter 5th option ("SYSTEM"), then 4th ("SOUND TEST"). The developers logo will appear at the top-left corner of the screen.

(UNI) Credits (added 01.03.17):
Hold Start + A + B + Left, then power the console on. The screen will turn white for about 2 seconds, quickly release all buttons and press Select within this time. If done right, the Credits roll will be displayed.

(BUR) Hidden text (added 01.03.17):
The SRAM initialization routine in this game uses as a signature string:
lovelymilk


Eijukugo Target 1000

(BUR) Hidden text (added 03.03.17):
There is a hidden copyright sctring at 0x000061 in the ROM:
1997 Feb. complete.Making by C-lab.co.,ltd.


Eitango Center 1500

(BUR) Hidden text (added 03.03.17):
There is a hidden copyright sctring at 0x000061 in the ROM:
1997 April. complete.Making by C-lab.co.,ltd.


Eitango Target 1900

(BUR) Hidden text (added 03.03.17):
There is a hidden copyright sctring at 0x000061 in the ROM:
1997 October complete.Making by C-lab.co.,ltd.


F-1 Race

(GEN) Demo speed control (added 29.03.17):
During the demo sequence, press either A or B to increase or decrease the car speed correspondingly. Note: there is no proper indication of changed speed in this case on the game's HUD.
Source: urawaza.in, gamefaqs.com

Faceball 2000

(FIX) Secret names (added 30.03.17):
Go to options, then change the player's name to one of the following to get a corresponding effect.
SOUNDTEST-Sound test.
PHOTOPAUSE-Disable the splash message on pause.
CONFIG_SYS-Level select and additional parameters of the player setup.
Source: tcrf.net, gamefaqs.com
SHOWENDING-Show the ending.
EXTRALIVES-Extra 5 lives at the game start.

Family Jockey 2

(UNI) Extra money (added 31.03.17):
At the title screen, press Left, B, Right, Left, Left, Right, Right, B, then choose a new game to start with 100000 money.

(BUR) Debug flags (added 31.03.17):
The Extra money cheat uses variable at address $A8C1 in Cart RAM area to store its flag. But the same variable contains two more debug flags, never raised by the game, but tested at some points.
Set bit 0 of this variable to enable the debug race skip. Instead of the race you'll jump directly to the results list with all zeroes.
Set bit 1 of this variable to enable the Barcode scan skip cheat. At any "ENTER BARCODE" screen, hold Select, then press A to set predefined Barcode data ("999999999") to use it in the game without need of the Barcodes.

Famista 2

(GEN) Ball speed mini-game (added 01.04.17):
At the title screen, hold B then press Start. Adjust throwing parameters, then pitch and catch the ball, the speed will be recorded.
Source: urawaza.in, gamefaqs.com

Famista 3

(BUR) Hidden text (added 01.04.17):
There are various copyright strings used for initializing the RAM partitions in this game:
   copyright 1993 yukihiko yagi   
Used as common Cart RAM signature.
TAKA FUKAWA
Used as regular game save slots initializer.
TAKASHI FUKAWA
Used as the special team data signature.

Felix the Cat

(UNI) Weapon and stage select (added 05.04.17):
At the title screen intro animation before the "PUSH START BUTTON" message appears, press Right, A, Down, B, A, B, Down, A. A sound will confirm correct code entry. Now, during the game press Select to power up to the next weapon instantly, or on pause press A or B to select any stages, including the boss rooms.

Ferrari - Grand Prix Challenge

Japanese version:

(BUR) Hidden text (added 05.04.17):
Among other unused text resources shared in both regional versions of this game, there is an odd string at the end of BANK 2 in the Japanese version:
SEARCH - NEM - NEWLAND
This string isn't present in the US version.

Fidgetts, The

All versions:

(GEN) Restart or quit stage (added 06.04.17):
Any time during the game, press Start + Up to open the Restart or quit stage menu.

(UNI) Staff roll (added 06.04.17):
At the title screen, press Select + B + Right. In the Japanese version the credits roll much shorter than in the US version.

(BUR) Game genie (added 06.04.17):
002‑CCA‑C4D (for the Japanese version)
002‑ED3‑C4D (for the US version)
-Re-enables the Extra lives cheat. At the title screen press Start + A + B + Up. A screen will flash for a short time. Now you'll have extra 10 lives at the beginning of the game.

Japanese version:

(UNI) Secret message (added 06.04.17):
At the title screen, press B + Up once, then wait until the current copyrights message loop is over. The secret greetings from programmer will appear in place of the copyrights text. Due to completely lack of the copyright messages on the title screen in the US version, there is no similar secret message as well.

FIFA International Soccer

(BUR) Hidden text (added 07.04.17):
There is the hidden version string at the beginning of the rom:
17 Dec 1994 14:17:55
Also, there is a common Probe software copyright string at the beginning of the sound engine:
(C)Probe

Source: tcrf.net

FIFA Soccer '96

(BUR) Hidden text (added 07.04.17):
There is the hidden version string at the beginning of the rom:
29 Sep 1995 19:25:56
Also, there is a common Probe software copyright string at the beginning of the sound engine:
(C)Probe

Source: tcrf.net

FIFA Soccer '97

(FIX) Secret passwords (added 10.04.17):
All passwords are unlockable and given to you randomly after beating the Tournament mode of this game.
K00KY-During the game, kicking the ball results in its crazy behaviour. It's moving without any physics, constantly changing direction.
B+T#*M-Max out player's team parameters instantly during the game (all are higher than the best team "T*HQ Tornados").
BR1CK#D-Slow down the ball speed for the rival team.
#*G+#-No fouls for the player's team (if enabled in the Options).
Source: gamefaqs.com

FIFA Soccer '98 - Road to the World Cup (USA), World Cup '98 (Europe)

(FIX) Secret passwords (added 10.04.17):
All passwords are unlockable and given to you randomly after beating the Tournament mode of this game. All effects are exactly the same as in previous part (97) made by the same developers.
100PY-During the game, kicking the ball results in its crazy behaviour. It's moving without any physics, constantly changing direction.
M#NWTD-Max out player's team parameters instantly during the game (all are higher than the best team "T*HQ Tornados").
W#11*D-Slow down the ball speed for the rival team.
B11ND-No fouls for the player's team (if enabled in the Options).
Source: gamefaqs.com

Final Fantasy Legend, The (USA), Makai Toushi SaGa (Japan)

(GEN) Sound test (added 11.04.17):
At the title screen, hold Down + Select (for the US version) or Left + Select (for the Japanese version), and then additionally hold B, then wait for about 4-5 seconds and release all buttons. If done right, the Sound test will replace the title screen menu.
Source: gamefaqs.com, tcrf.net

Final Fantasy Legend II (USA), SaGa 2 - Hihou Densetsu (Japan)

(GEN) Sound test (added 11.04.17):
At the title screen, hold Start + Select, then press B.
Source: gamefaqs.com

Fire Dragon (Unlicensed)

(BUR) Hidden text (added 12.04.17):
There is a hidden copyrights string at thte beginning of the ROM:
GOWIN FIRE DRAGON 199404
There may be more Shift-JIS encoded text near, investigate.

Fire Fighter

(FIX) Secret passwords (added 12.04.17):
00PRJ00-Level select and infinite lives. Press A + B + Select during the game to instantly complete the level.
PLQQ23J-Level 10 (game does not give password for this level)
JK22GVV-Level 11 (ending)
VXV55ZS-Level select. Press A + B + Select during the game to instantly complete the level.
Source: tcrf.net

Fish Dude (USA), Uoozu (Japan)

All versions:

(BUR) Hidden text (added 12.04.17):
There are hidden copyright string at the beginning of the ROM:
                            1990  SALIO & ANex                  

Source: tcrf.net

Japanese version:

(GEN) Secret passwords (added 12.04.17):
At the Stage number screen, select any stage greather than 1 using A. Press Start to start a password input mode. Enter one of the following words then hold Down and press Start to enable the secret feature.
STAF-Staff roll.
MSIC-Sound test.
FONT-Toggle between default small font and a larger one.
MODE-Options menu. You can select difficult, number of lives and toggle to inverted palette.
MAPS-Stage select.
XENA-Unlock levels A-C. Note, this is only enables these levels at the Stage number screen, but you still need to know a valid passwords to play them.
Source: makainyumon.web.fc2.com

US version:

(BUR) Game genie (added 12.04.17):
Due to passwords system changes in the US version, the secret passwords were disabled. But all code still sitting in the ROM unreferenced. There is no simple proper way to re-enable them, but you can try to access some of features somehow using the following Game genie codes. To enter the corresponding function, go to the password input screen and just press Start. Also as a result of hacky method of accessing you couldn't use some features, like selecting the levels or unlocking the A-C levels.
03F‑6FF‑5DF+32F‑70F‑A2A-Staff roll.
76F‑6FF‑5DF+33F‑70F‑A2A-Sound test.
9EF‑6FF‑5DF+-Toggle font. Due to hacky method of accessing, it will garbled.
C9F‑6FF‑5DF+35F‑70F‑A2A-Options menu. You actually can make use of it.
38F‑6FF‑5DF+37F‑70F‑A2A-Stage select. Due to hacky method of accessing, won't go anywhere.

Fist of the North Star (USA), Hokuto no Ken - Fist of the North Star (Japan)

(GEN) Parameters display (added 13.04.17):
At the mode selection menu, press Select + A to get to the parameters display menu. There are not only the level of characters will be displayed, but its experience points and attack/defence parameters. This code is described in the game's official manual.

(UNI) Password generator (added 14.04.17):
Note, that the game's password system uses the data's checksum to perform password permutation at the generation stage, but at the decoding stage there is no check against the real checksum. It's just permuting password back using the stored value. This password generator will generate actual game passwords, unless you use the "Checksum hack" option, where you can use your own checksum value to encode the password. Most of internet passwords for this game exploiting this feature somehow.
CharacterLevel
Kenshiro:
Heart:
Shin:
Jagi:
Uygur:
Souther:
Raoh:
Falco:
Han:
Hyou:
Kaioh:
Checksum hack:
Password:


Flash, The

(GEN) Credits (added 17.04.17):
Normally, the Credits can be seen when the demo loop is over. But if you press B at the title screen, you can see the Credits instantly.

(GEN) Pause (added 17.04.17):
During the game, press Select + Start.

(FIX) Passwords (added 17.04.17):
To enter the password, at the title screen, press Select. Althought the password in this game is 10 characters long, only the first 7 are checked by the program. Here is the full list of acceptable street names with not important parts in braces:
"23 DELA"(NEY)-Level 2
"DENIM B"(LVD)-Level 3
"TRACK 2"(9)-Level 4
"99 PICA"(SSO)-Level 5
"INGOT L"(ANE)-Level 6
"7TH MAR"(KET)-Level 7
"TRACK 1"(2)-Level 8
"RUE LE "(DAY)-Level 9
"TIN ALL"(EY)-Level 10
"GORBY W"(AY)-Level 11
"TRACK 6"(6)-Level 12
"FUN HOU"(SE)-Level 13

(BUR) Hidden text (added 17.04.17):
There is no password or street name display for the first one Level of this game. But actually, its name is stored in the passwords list with index 0 and even checked by the password system, but can't be accepted, since the valid stage index should be non-zero. The street name is:
143 FIFTH
Also, there is an unused cutscene message
-(MORE: PRESS A)-
intended to be used when a special code is inserted in the cutscene line. But In the final release there are no such codes in any cutscene texts.
Source: tcrf.net

Fleet Commander VS

(GEN) Cease fire (added 17.04.17):
During the game, in the main game menu, enter "がいこう" ("Diplomacy") option, then select "メッセージにゅうりょく" ("Input message") option. Enter word "コウフクシマス" ("Surrender"). Return back to the main game menu and choose "END" option to instantly end the battle, following with the "CEASE FIRE" cutscene.

(UNI) Disable fog of war (added 17.04.17):
At the title screen menu, hold Select + B + Left. The cursor will jumping constantly on the menu items. Press A exactly that moment, when the cursor is pointing on the first option "1P. GAME", this little bit tricky. Another method to trigger this cheat is to set the cursor position to "LOAD GAME" option, press Select + B + Left at the same time and immediately after it (when cursor is changing its position), additionally press A (do not release previous buttons!). If done right, the game will start, from now all enemy units will be visible on the map permanently.

Flintstones, The

(GEN) Stage select (added 17.04.17):
Enter the "OPTIONS" menu, now select the "FX TEST" option and play the sounds: 25, 01, 02, 02, 01, 04, 01, 02, 02, 01, 04, 15. Now play any sound one more time to enable the cheat. Return to the title screen, the message "CHEAT ON!" will appear at the upper-right corner of the screen. Start a new game, the level/mini game select screen will appear. You can select and play any mini-game, watch the ending sequence, other game sequences and play from any act as well. Also this cheats enables the stage skip feature for most of the stages. During the game just press Select to advance to the next stage. Note, if one converts the numbers of the sounds needed to be played to their corresponding letter (e.g. 01 = A, 02 = B, etc.), it spells out "YABBA DABBA DO", Fred's catchphrase.
Source: tcrf.net

Flintstones, The - King Rock Treasure Island

(FIX) Title screen cheats (added 18.04.17):
All cheats should be entered at the title screen. If done right, a sound will confirm correct code entry.
Down, Down, Down, Down, Up, Up, Up, Up-Invert screen colors permanently.
Select, B, A, A, B, Select, B, A-Hidden mini-game after the game start.
Source: gamefaqs.com, tcrf.net

Football International (USA, Europe), Soccer (Japan)

(UNI) Secret mode (added 18.04.17):
At the title screen, put cursor to "2 PLAYERS" menu option, then hold Up + B and press A or Start to begin the game. This will force the "WORDL CUP" mode to begin and starts from the "TEAM SELECT" screen instantly, but instead it will be called "SECRET MODE". Here you'll be able to select the starting round of the tournament by selecting a corresponding team to play against.

(UNI) Always penalty kick (added 18.04.17):
Enter the "Secret mode" cheat as described above. At the team selection screen, select your team, then choose the team you want to play against, hold Select and press A. If done right, you'll jump directly to the round results screen with obviously 0-0 score, so this will force the penalty kick mode to begin.

(UNI) Ending (added 18.04.17):
Enter the "Secret mode" cheat as described above. At the team selection screen, press Up, Up, Up, Left, Left, Select.

(BUR) Hidden text (added 18.04.17):
There is a hidden string near the end of bank 3 repeated 10 times:
PC-8001 FOREVER


Fortified Zone (USA), Ikari no Yousai (Japan)

(GEN) Players switch (added 19.04.17):
During the game, hold Up, then press Select + Start to instantly switch between players without need to go to the options menu.

(UNI) Secret message (added 19.04.17):
At the "GAME MODE SELECT" screen, enter "SOUND BOY" mode. Choose "PROGRAM PLAY" mode and set any sequence of the music tracks to play. Start to play the program either in "THROUGH" or "REPEAT" modes, no matter. There is a piglet character walking on the screen all the time the music is playing. At some point, this piglet will stop and make a bow to the player for a very short time. Press A + Start at exactly that moment. This may be tricky, but if done right the message "BU !" will appear above the piglet. Need to mention, "SOUND BOY" actually was written for another game: "Hero Shuugou!! Pinball Party". The piglet and fire heads are characters from that game.

(FIX) Secret passwords (added 19.04.17):
Note, that there are no infinite lives/ammo passwords, only large amount of it at start. Also note, the second portion of passwords has a dupes with exactly the same effects but different names. Also all these passwords causes a HUD glitch if simple players switch button (Start) is used for the very first players switch on the level. All secret cheats as well as chibi female mode were totally scrapped from the US version.
Regular passwords for all versions
Always start as male, default parameters.
CCCC (for the Japanese version) 1111 (for the US version)-Stage 1
TANK (for the Japanese version) 3375 (for the US version)-Stage 2
DRAG (for the Japanese version) 1681 (for the US version)-Stage 3
COMP (for the Japanese version) 1122 (for the US version)-Stage 4
For the Japanese version only
Extra 240 medkits/bullets, max lives/bullets, flame thrower weapon.
AAAA (Male) BBBB (Female)-Stage 1
GUN? (Male) JEEP (Female)-Stage 2
CANO (Male) BIO! (Female)-Stage 3
BOMB (Male) ROBO (Female)-Stage 4
Always start as male, chibi female mode, default parameters.
Simple players switch button code enabled: Start.
Stage skip cheat enabled: hold Down, then press Select + Start.
YURI-Stage 1
KEI!-Stage 2
AMI!-Stage 3
RIE!-Stage 4
Chibi female mode.
Extra 240 medkits/bullets, max lives/bullets, flame thrower weapon.
Simple players switch button code enabled: Start.
Stage skip cheat enabled: hold Down, then press Select + Start.
MINT or YOKO or MIA! (Male) MOMO or MAMI (Female)-Stage 1
ELI! or RISA or GAMI (Male) EMI! or JUN! (Female)-Stage 2
REI! or KAYO or RIKA (Male) MAI! or TAE! (Female)-Stage 3
SAKI or RUMI or ERI! (Male) YUU! or NAMI (Female)-Stage 4
Source: tcrf.net, gamefaqs.com

Frank Thomas' Big Hurt Baseball

(UNI) Instant win (added 06.05.16):
Choose any game mode with scoring, start the game with "Play ball" option. Now, exit to the "Team Options" menu by pressing Start any time during the game and press Up, Down, Left, Right, Up, Down, Left, Right plus any other button to complete the sequence. A sound will confirm correct code entry. This will set the highest score to your team. Continue the game with "Play ball" option again to instantly win current round and skip to the next depending on the game mode you've played. Similar cheat can be found in other Baseball game from the same developers: "All-Star Baseball '99".

Frisky Tom

(BUR) Game genie (added 20.04.17):
C0C‑02C‑E6A+07C‑01C5DE6A+FAC‑00C‑C4D-Re-enables the Debug menu. Hold Select + Start once Frisky walks onto a stage, then press Up once and Down once in any order.
06D‑AAC‑F7E-Additionally to the previous codes use this one to enable the 6th unused line of the debug menu "BG PAL".
Source: tcrf.net

From TV Animation Slam Dunk - Gakeppuchi no Kesshou League

(BUR) Game genie (added 13.08.16):
620‑12F‑6EF-Re-enables the debug mode. Press B at the title screen. There are 7 options available from 1 to 7 correspondingly: Face test, Message test, Cutscenes test, Dunk Animations test, Offence/Defence test, Sound test, Game moves test. Presss A to enter any of tests, press Start to return back to the game.
Source: tcrf.net

From TV Animation Slam Dunk 2 - Zenkoku heno Tip Off

(UNI) Field warping (added 15.08.16):
Either at the intro or at the title screen, hold Up + Left, then press Start to skip to the next screen (to the title screen if you press when the intro is played or to the main menu if pressed at the title screen). During the game, any time on the main field screen (except the initial ball toss), press Up, Up, Down, Down to warp current player forward to about 1/5 of the game field, but not farther than the beginning of the 2-point zone. This works even if your currently controlled player has no ball in hands.

(UNI) Secret passwords (added 15.08.16):
WJUMP-Enables a Special game mode option at the title menu, which allows you to play any of 6 story mode stages as a single training stage. After this stage is over, you'll se only the game results, then return to the main menu. However, all intermission cutscenes will be displayed.

(BUR) Game genie (added 15.08.16):
622‑08F‑6EF-Re-enables the debug mode. Hold B and reset the console, you'll see a number representing one of the internal game handlers. Some of the game handlers are for debugging and can't be accessed during the game: 2 - SGB test screen (note, that garbage it displayed is because it uses the game's code instead of an actual graphics data), 4 - Hidden unused UFO mini-game, used in "Captain Tsubasa J", 5 - Attack/Defence test, 13 - Sound test, 15 - Animations test, 21 - Halftime test, 22 - Face expressions test. Press A to enter one of the selected handlers, press Start to return back to the game.
Source: tcrf.net

Fushigi no Dungeon - Fuurai no Shiren GB

(GEN) Cart RAM clear (added 21.04.17):
At the title screen, press Up, Left, Down, Up, Left, Right, Down, B, A, B, A, Select. A sound will confirm correct code entry. This should reinitialize the Cart RAM and reset all previous saves and settings. Most probably this cheat were described in the game's manual.

G1 King - 3 Biki no Yosouya

(GEN) Girl crystal gazers (added 22.04.17):
At the title screen, press A + B + Start.
Source: urawaza.in

(UNI) Sound test (added 22.04.17):
Hold Down, then power the console on.

Game & Watch Gallery (USA, Europe), Gameboy Gallery (Japan), Gameboy Gallery 2 (Australia)

(GEN) Cart RAM clear (added 22.04.17):
At the title screen, press Up, Up, Down, Down, Left, Left, Right, Right.
Source: gamefaqs.com

Game & Watch Gallery 2 (USA), Gameboy Gallery 2 (Japan), Gameboy Gallery 3 (Australia)

(GEN) Pause frame pattern change (added 22.04.17):
During the game, when the CONTINUE/RETRY/EXIT menu is displayed, you can cycle throught a large amount of different animated patterns with the B button.

(GEN) Cart RAM clear (added 22.04.17):
At the title screen, press Up, Up, Down, Down, Left, Left, Right, Right. A sound will confirm correct code entry. In case there are an Interrup saved games from the previous play, this code will erase only the other games statistic, and additionally begin the title demo sequence instantly.

(BUR) Game genie (added 24.04.17):
201‑EEF‑B3A (for the US version)
201‑DBF‑B3A (for the Japanese version)
-Re-enables a complex set of the Debug menu which allows you to debug a lot of games parameters.
Source: tcrf.net

Game genie V1.17 (BIOS)

(FIX) Cheat sequences (added 29.09.16):
At the main GG entry screen, enter one of the following button sequences to get the corresponding effect.
Up, Down, Left, Right-Secret message 1.
B, A, Left, Right, Select-Secret message 2.
Up, Up, A, B, A, Down, Down-Secret message 3.
Right, Up, Down, Up, Left, Up, Down, Up-Secret message 4.
B, A, B, Right, Left, Down, Up-Secret message 5.
A, A, A, A, B, B, B, Start-Secret message 6.
Right, Left, Right, Left, Down, Down, Up, Up-Secret message 7.
Down, Up, Down, Down, Left, Right, Left, Start-Secret message 8.
A, B, A, B, B, A, A, Select-Secret message 9.
A, Left, Left, A, B, Right, Right, B-Toggles the large fonts upside-down flip.
B, Down, Down, A, B, Up, Up, A-Toggles the small fonts upside-down flip.
Source: tcrf.net

(GEN) Secret words (added 29.09.16):
At the main GG entry screen, input one of the following words as Code 3, then press A on the first space of Code 1. Note, that "-" means that this character is erased with B button.
DEAD------Toggle vertical screen shake.
ABACADABA-Toggle horizontal screen shake. Both codes may be combined.
F154------Toggle the main selection cursor into the fish and back into the hand.
FACE------Toggle the GG cursor into the face and back into the cross.
1984------"Explode" secret message.
BAC4------Toggle inversion of D-Pad buttons.
1CE‑---‑--Never release D-Pad buttons.
414E5-----Horizontal screen wave effect.
6EE6------Vertical screen wave effect
Source: RFredW

Game of Harmony, The

(UNI) Stage skip (added 24.04.17):
During the game, point the player's arrow straight up and press Up once, press B to point the arrow in opposite direction, then press Down. If done right, you'll hear the sound every time you press the direction button, from now, press Select to skip to the next level up to the last one.

Gameboy Gallery (USA)

(UNI) Cheat mode (added 25.04.17):
To trigger this cheat on, for any game selected, at the game menu, put cursor to "START" option, hold Select + B + Up and press A to Start. If done right, the starting jingle will be different. From now you'll be able to manipulate the game's scores. Each game has its own unique score edition inputs and effects, all described in the table below. Note, the TOP scores are disabled in cheat mode, so you couldn't keep your "records".
Ball-Press Up to set the lowest digits of the scores to 99. So you can only "skip" to the next 100 points every time you get a point in the game.
Vermin-Press Up or Down to increase your scores to 100 or 10 points respectively.
Flagman-Press A or B to increase your scores to 1 to 10 points respectively during the Flagman show time. When there is the time to answer, the correct number will be hinted at the top-left side of the screen.
Manhole-Press B, same as in the "Ball" game.
Factory-Press Up or Down, same as in the "Vermin" game.

Gameboy Wars (Japan), Gameboy Wars Turbo (Japan, Rerelease)

(GEN) Cart RAM clear (added 25.04.17):
At the main game menu, hold A + B, then press Left, Left, Right, Start.

Ganbare Goemon - Sarawareta Ebisumaru!

(GEN) Sound test (added 27.04.17):
After the game over screen, at the continue menu, press Up, Up, Down, Down, Left, Right, Left, Right, B, A.
Source: famefaqs.com

(UNI) Password generator (added 27.04.17):
There are icons instead of letters in this password system. In this password generator icons are numbered left to right in the top row as 1,2,3,4 and as 5,6,7 in the bottom row.
Stage:
Jewels:
password:


(BUR) Game genie (added 27.04.17):
2FC‑86F‑7FE-Re-enables the quite sinmple and partially non-functioning Debug screen. The values are uninitialized at start with this code. First two values represents the stage index and location respectively. Invisible option correspond to the sound player music index, but there are no code to start the music from there. The last visible options changes some game var, but it reinitialized when the game starting, so does not effect at all here.

Ganbare Goemon 2 (Japan), Mystical Ninja (USA)

(BUR) Game genie (added 27.04.17):
011‑F7E‑E6A (for the US version only)-Re-enables some debug features. At the Map screen, press Up/Down to change starting location, press A to continue (delay is disabled). During the game, press A + B + Select to skip the stage instantly. The Japanese version has all the same routines, but there are no variable initialization to hack, but you still can modyfy the RAM address $C067 to any non-zero value to enable them. Also, the stage skip cheat there is different: A + B + Start

Ganbaruga

(GEN) Unlock extra multiplayer characters (added 02.05.17):
At the title screen, choose "たいせん" ("Taisen") mode (linked multiplayer), then at the character selection screen, highlight "ガンバルガー" ("Ganbaruga") character and press Right, Left, Right, Left, A, B, A, B. Two new characters "ゴクアーク" ("Gokuaku") and "ヤミノリウス" ("Yaminorius") will be available to select as playable fighters. This code is unlockable and given to you after completing the game for the first time.

GB Genjin Land - Viva Chikkun Oukoku

(GEN) Ending (added 03.05.17):
Start a new game, buy a ticket and walk into the Theme park. Go to the exit way (middle-bottom), when asked to accept or cancel, press and hold A + B + Select instead. This is little bit tricky, because two of these buttons are used for either the exit from this menu or for the accept the selection. If done right, the ending sequence will start instead of the outro cutscene.
Source: urawaza.in

(GEN) CRT test screen (added 03.05.17):
Start a new game, buy a ticket and walk into the Theme park. Go to the exit way (middle-bottom), when asked to accept or cancel, select to accept the exit. Now, when the screen with Genjin on the log in the middle of the sea appears, press and hold A + B + Select and wait until the CRT test pattern appears on the screen.
Source: urawaza.in

(GEN) Title screen cheats (added 03.05.17):
At the title screen, put cursor to the second menu option ("Warming up exercises"), hold one of the button combinations from the table below, then press A or Start.
Left + Select-Sound test.
Right + Select-Play any mini-game with any level of difficulty.
Source: urawaza.in

GB Pachislot Hissyouhou Jr.

(BUR) Hidden text (added 03.05.17):
The CRAM initialization routine in this game uses as a signature the following string:
Yamazaki1hiroshi


GBKiss Mini Games

(UNI) Secret passwords (added 12.05.17):
This is a special cartridge with the GB KISS menu only (the other games with GB KISS support has it as the additional option inside the game, however, the menu code exactly the same for all games and cartridges). There are several games and additional files contains in this particular cartridge, but most of them are locked by passwords for some unknown reason. Also not known (at least by me), where they should've been publish those secret passwords and wether any of it is available in public now. So, consider all these password as a secret now, until someone told me it's not true. Following table contains the complete list of the files on this cartridge and how to unlock it. All games are separated by 6 categories, only the first one is unlocked from the beginning. To input password, at the main GB KISS menu, press B, then select "PASSWORD INPUT" option. If done right, the corresponding menu option will appear in the list. To transfer the game to the CRAM, choose any category, then press Start on selected game. Note, there are several data files tha need the main program in order to work properly, so you must put them in CRAM together. Every file takes up to 8Kb of the CRAM, from 32Kb in total, so you can't load all the files at once in CRAM.
Category|Unlock password|List of games/files|Notes
キャラバンバージョン 5ゲーム
("Caravan version 5 games")
|-|モグってナンボ ("Mogutte Nanbo")
SAMEGAME KISS
ジャカジャカジャンプでポン ("Jaka-Jaka-Jump")
がんばれマグネッシMAIN ("Drive" main file)
がんばれマグネッシDATA ("Drive" data file)
SHOOTING MASTER
|Both "Drive" files should be in CRAM at the same time in order to work properly.
キスモン&バケちゅリレーほか4
("Kissmon&Bucket Relay and 4more")
|KISSMON|KISS MONSTER
ストップウォッチ&タイムー ("Stop Watch")
かんい でんたく ("Calculator")
バイオリズム ("Biorhythm")
サウンド ルーム ("Sound test")
バケちゅリレー("Bucket Relay")
|"KISS MONSTER" is an earlier version of the same tool, included in Japanese "Pocket Bomberman" (the only available mini-game there by default).
15パズル&キャノン ほか4こ
("Puzzle 15&Cannon and 4 more")
|CANNON|アイコンデータしゅう ("Icons data")
アイコン エヂィター ("Icons editor")
15パズル&パネル ("Puzzle 15")
スロット マシン ("Slot machine")
キャノンボール ("Cannon Ball")
ポーカー ("Pocker")
|-
バイナリーランド&BJはか2こ
("Binary Land&BJ and 2 more")
|BINARY|WORM
バイナリーランド ("Binary land")
ルーレット ("Rulette")
ブラックジャック ("Black jack")
|-
ミニゲームがぞういれかえデータ
("Mini games picture replacement data")
|GAMEDATA|15パズル データ1 ("Puzzle 15" data 1)
15パスル データ2 ("Puzzle 15" data 2)
15パズル データ3 ("Puzzle 15" data 3)
モグってナンボ データ ("Mogutte nanbo" data)
スコップウォッチすうじデータ ("Stop watch" data)
|Expansion packs for the previous mini-games.
GB KISS TOOLS|KISSTOOL|SRAM GET&CLR
FILE ALL DELETE
CHAR DUMP
|Sends the CRAM or CHR data via IR port to PC or just wipe all CRAM data (keep settings and unlocked passwords).

Gear Works

(UNI) Secret passwords (added 15.05.17):
At the Code entry screen first enter "0105" as a password and press B. Start a new game, press A + B to commit suicide three times to lose all lives and return back to the title screen. Now, at the Code screen, enter password "1967" and start a new game again. From now, the A + B combination will skip current stage instead of restarting it with losing a life. Also, you'll get extra 9 lives and 99 of every items. The password numbers are clearly the someone's birth date.

Gem Gem

(GEN) Secret names (added 16.05.17):
Enter one of these words as a player's name.
たまやま-Sound test.
Source: makainyumon.web.fc2.com

(BUR) Game genie (added 16.05.17):
There are a lot more Secret names were planned, or was removed in the release version. This is unknown what names exactly they used before, all letters are erased now, but with this codes you can make simple replacement to use as the Secret name and get the corresponding effect. Note, the rest of the name should be filled with special SPACE symbol.
011-E2D-E6A-Secret name "あ___" - Area 2 warp
021-EAD-E6A-Secret name "い___" - Area 3 warp
031-F2D-E6A-Secret name "う___" - Area 4 warp
041-FAD-E6A-Secret name "え___" - Area 5 warp
052-0AD-E6A-Secret name "お___" - Ending

Ghostbusters II

Japanese version:

(GEN) Continue screen cheats (added 29.05.17):
Start a new game, loose all lives. After the game over screen at the Continue menu, put cursor to the "END" option, then hold Select and press one of the buttons from table below to get the corresponding effect.
A-Ending
B-Sound test
Source: makainyumon.web.fc2.com

Ginga (Tornado Appetizer)

(UNI) Test menu (added 29.05.17):
Any time during the game, hold Up + Left, then do Soft-reset (A + B + Select + Start at the same time). The menu allows you to listen to the music and sound effects, see the Stage complete animations and the Staff roll.

Global Gladiators (Prototype)

18th January version:

(UNI) Cheat mode (added 30.05.17):
This cheat only exists in the latest known prototype. Pause the game, then press Left, Up, Right, Down, Left, Left, Up, Up, Right, Right, Down, Down, Up, Down. This will toggle the internal cheat flag on or off. If cheat flag is on, the message "ON" will be displayed above the "PAUSE" message. Otherwise you'll see the "OFF" message. When cheat is on you is invulnerable for enemies and its projectiles, but still could die in the water or ground pits and during the last boss battle. Press Select during the game to skip current stage. When you lose the game and return back to the title screen, pressing any button will bring you to the secret developer's message scroller instead of the "OPTIONS" screen. This message is about 1.5Kb in size and cyphered with xor code, so you couldn't see it inside the ROM easily. Also, this cheat replacing the ending screen with the message:
     CHEAT MODE
    WHAT A LOSER


  CODE BY D STONES
 GRAPHICS BY A PANG


Go Go Ackman

(UNI) Title screen cheats (added 30.05.17):
At the title screen, hold one of the button combinations from the table below, then press Start to get the corresponding effect.
A + B + Select-All powerups
B-Stage select

Go! Go! Hitchike

(GEN) Cart RAM clear (added 31.05.17):
At the title screen, press H, Down, B. You'll be prompted whether you want to erase the saves on the Cart RAM or not.
Source: urawaza.in

Go! Go! Tank

(GEN) Title screen cheats (added 01.06.17):
At the title screen menu, press Left, Up, Right, Up, Left, Left, Up, Right, Up, Left, Up. Now the cheat mode is enabled. Available options are described in the table below.
Press Left once.-Enable invincibility.
Press Right once.-Extra 7 lives at the game start.
Press B up to 10 times.-Select a starting Stage.
Source: urawaza.in

Godzilla (USA), Godzilla-kun - Kaijuu Daikessen (Japan)

(GEN) Sound test (added 01.06.17):
During the game, hold A + B + Start, then press Select.
Source: urawaza.in

(UNI) Secret passwords (added 01.06.17):
Enter one of following passwords in "PASSWORD 18" mode to see one of the developer's messages. Note, "_" symbol means you need to skip this char with "->" arrow.
D#RR=N___ C/#TS____ (for the US version only)-Message to Coats
&?K1N/R1_ T/_N/R1=_ (for the US version)
YUK1N0R1_ T0_N0R1E_ (for the Japanese version)
-Message to Nori
PR/GR#M=R S_FR1=NDS (for the US version)
PR0GRAMER S_FR1ENDS (for the Japanese version)
-Message to Friends
TEST_____ PLAYERS__ (for the Japanese version only)-Message to Test players

(UNI) Cheat mode (added 01.06.17):
Enter any of the Secret passwords described above. During the game, press Select to get to the game menu. Hold A + B and press one of the following combinations to get the corresponding effect.
A-Toggle invincibility on or off.
A + Right-Jump right on the level's map.
A + Left-Jump left on the level's map.
A + Up-Jump up on the level's map.
A + Down-Jump down on the level's map.

Golf

(GEN) Training mode (added 04.06.17):
At the title screen, for "1PLAYER" option, hold Down, then press Start to start a new game in a Training mode.
Source: gamefaqs.com

(GEN) Cart RAM clear (added 04.06.17):
At the title screen, press Select to go to the Records screen. Hold A + B, then enter Up, Down, Left, Right.

Golf Classic (Europe), Sports Illustrated - Golf Classic (USA)

(UNI) Soft-reset enable (added 04.06.17):
At the "ADDITIONAL TESTING" screen, press Select + Left. This will enables the Soft-reset feature. To use it during the game, press A + B + Select + Start. Weird enough this feature need to be hidden under the button code, since most of the GB games has this functionality enabled always by default with just little variations.

(UNI) Cheat mode (added 04.06.17):
At the License screen, quickly (in less than 8 seconds) hold A, press Right, release all, hold A + B, press Up, release all, hold B, press Left, release all and hold A + B, press Down. A sound will confirm correct code entry. Cheat mode enables a lot of new features:
During the game hold Select, press B to skip to the next hole instantly.
When ball is falls into the water, there is a different icon is displayed ("H2O").
When "FAIRWAY" menu is displayed, there is an additional animated character pointing to the menu options from the right side of the screen.
Also, var $D174 set to 2 instead of 1 by default. Used at the game start and before any "FAIRWAY" menu. Investigate.
At the Game select menu hold Right before selecting any option, var $D174 will be set to $F0. Investigate more.


(UNI) Secret courses (added 04.06.17):
First, enable the Cheat mode as described above. Then you need to press a particular buttons to skip next four screens after the License screen. At the title screen, when the scroll is stopped, press Select. At the "DEVELOPED BY" screen, press Start. At the "MUSIC AND SOUNDS BY" screen, press B. And finally, at "EXECUTIVE PRODUCER" screen press A. From now there are two extra Secret courses will be available. Note, two first courses now has a different names at the Course select screen. For two Secret courses the Hole select and Hole skip functions are disabled by default. To enable the Hole select mode, hold Left before selecting the player mode. To enable the Hole skip mode, hold Right before selecting the player name.

Goukaku Boy Series - Gakken - Yojijukugo 288

(BUR) Hidden text (added 06.06.17):
There is a hidden copyright text at the beginning of the ROM:
PROGRAMMED BY TOKI


Goukaku Boy Series - Shikakui Atama wo Marukusuru - Kanji no Tatsujin

(UNI) Unlock Devil tournament (added 06.06.17):
At the starting logo screens, before the title screen appears, press Left, Left, Right, Right, Down, Down, B. A sound will confirm correct code entry. In the main game's menu, the menu option "?" will appear, enter it and after a short briefing it will turns to a secret "まおう大会" game.

Goukaku Boy Series - Shikakui Atama wo Marukusuru - Keisan no Tatsujin

(UNI) Unlock Devil tournament (added 06.06.17):
At the starting logo screens, before the title screen appears, press Left, Left, Right, Right, Down, Down, B. A sound will confirm correct code entry. In the main game's menu, the menu option "?" will appear, enter it and after a short briefing it will turns to a secret "まおう大会" game.

Gradius - The Interstellar Assault (USA), Nemesis II (Japan), Nemesis II - The Return of the Hero (Europe)

(BUR) Game genie (added 07.06.17):
CDE‑7DF‑E65+00E‑84F‑E69 (for the US version)
CDE‑45F‑E65+00E‑4CF‑E69 (for the Japanese version)
-Re-enables the unsed "DEMO" screen, possibly used for Prototype builds.

Great Greed (USA), Vitamina Oukoku Monogatari (Japan)

(GEN) Unlockables (added 07.06.17):
Complete the game to unlock Sound test and Monsters book.
Source: gamefaqs.com

(BUR) Hidden text (added 07.06.17):
There is a generic Namco copyright text at the beginning of the ROM, partially used for RAM initialization signature:
COPYRIGHT 1992 NAMCO LTD. ALL RIGHT RESERVED


Gurander Musashi RV

(GEN) Cart RAM clear (added 08.06.17):
At the title screen, press Left, Left, Right, Right, Up, Up, Down, Down, B. A sound will confirm correct code entry.

Hal Wrestling (USA), Pro Wrestling (Japan)

(GEN) Continue (added 08.06.17):
At the title screen, select "1 PLAYER" mode, hold Up + Select and press A. Now, when loose any round, you'll start fighting from the beginning with current character instead of jump to the game over screen.
Source: urawaza.in

Hammerin' Harry - Ghost Building Company (USA), Daiku no Gen-san - Ghost Building Company (Japan)

(FIX) Stage select (added 08.06.17):
At the title screen, when the "PUSH START" message is displayed, press and hold A + B + Up + Right + Start. While holding all these buttons, wait for the screen turns blank. Now, press Select a number of times corresponding to the desires starting Stage number from 2 to 19 (including bosses). Every time you press Select a sound effect will be heard.
Source: jp.wazap.com

(UNI) Pause cheats (added 08.06.17):
During the game, press and hold A + B + Select + Start. If done right, the background music won't fade. While holding all these buttons, enter one of the combinations from the table below to get a corresponding effect. Every time you press the correct button in sequence, various game sound effects will play. If one of the buttons pressed incorrectly, then music will fade, and game jumps to generic pasue mode, so you should press Start here and enter all codes again.
Right, Left, Right, Left, Down, Down, Up, Up-Refill health.
Up, Down, Up, Down-Instant Game over.
Down, Down, Down, Down, Up-Toggle the Slow down mode on or off.

(BUR) Hidden text (added 08.06.17):
Here is a hidden version string at the beginning of the sound engine code, the same an all regional versions:
** Ver 6.04 **

Source: tcrf.net

Hayaoshi Quiz - Ouza Ketteisen (The King of Quiz)

(GEN) Secret game (added 09.06.17):
At the title screen, press Up, Up, Left, Left, A, B, Down, Start. A new option will appear in the bottom-left corner of the main game's menu.
Source: urawaza.in

(BUR) Game genie (added 09.06.17):
1A1‑7EB‑F7A-Re-enables the Quiz test mode. Select the theme with Up/Down, a question with Left/Right and display it along with the correct answer indication with A. Press Start to exit back to the title screen.

Hercules

(GEN) Secret passwords (added 10.06.17):
CRDTS-Credits.
Source: gamefaqs.com

Hero Shuugou!! Pinball Party

(UNI) Secret message (added 13.06.17):
At the "GAME MODE SELECT" screen, enter "SOUND BOY" mode. Choose "PROGRAM PLAY" mode and set any sequence of the music tracks to play. Start to play the program either in "THROUGH" or "REPEAT" modes, no matter. There is a piglet character walking on the screen all the time the music is playing. At some point, this piglet will stop and make a bow to the player for a very short time. Press A + Start at exactly that moment. This may be tricky, but if done right the message "BU !" will appear above the piglet. This "SOUND BOY" was reutilized later in another game by the same developer: "Ikari no Yousai".

(BUR) Extra Much push attempts (added 13.06.17):
When the "GAME OVER!!" message is displayed on the screen, press A + B + Select. This will gives to you an extra 3 "MUCH PUSH A" bonuses during the game. However, this bonus happened only right before the Game over, so you just couldn't use all three of them in one run. When you return to Continue screen, the bounus counter will be reset to the default value 01 or may be restored to 03 with this cheat again. So, all this it seems mostly useless.

Higashio Osamu Kanshuu Pro Yakyuu Stadium '92

(GEN) Secret teams (added 13.06.17):
At the Team select screen, while selecting the CPU team, press Up + Select. If done right, an extra 3 special teams select screen will appear.
Source: urawaza.in

High Stakes Gambling

(UNI) Credits (added 13.06.17):
At the title screen, press Select + B.

Hinsyutu Eibunpo

(BUR) Hidden text (added 14.06.17):
There is a hidden credits text at the beginning of the ROM:
PROGRAMMED BY minoru(12/18-0)


Hit the Ice

(UNI) Animations test (added 14.06.17):
Start a new game either in a Championship or VS. Play modes. Before the game starts, when the "PERIOD START" / "FACE OFF" messages are displayed, hold Select + Up for a second until the menu appears. You can see the animation sequences for various game events. There is no exit from this mode, and it seems this is just a debug leftover, which developers forgot to remove.

Hoi Hoi - Gameboy Ban (Japan), Stop That Roach! (USA)

(BUR) Game genie (added 14.06.17):
Both codes replaces the "NEW GAME" option at the title screen with a corresponding test. There were a button codes assigned for both tests, but they are not checking in all release versions. The the US version has additional option in the Anim test allowing you to return to the title screen, which you couldn't in the Japanese version.
B16‑95E‑D59+456‑96E‑D5A (for the US version)
2D6‑44E‑D59+466‑45E‑D5A (for the Japanese version)
-Sound test (Select + Up cheat in the US version, Select + B + Left + Up - in the Japanese version)
3A6‑95E‑D59+466‑96E‑D5A (for the US version)
B66‑44E‑D59+466‑45E‑D5A (for the Japanese version)
-Anim test (Select + Down cheat in the US version, Select + B + Left + Down - in the Japanese version)

Home Alone 2

(UNI) Secret items (added 15.06.17):
There are three Secret items in this game. Each called "[Name] Magic", where "[Name]" is one of the dev names, and gives to you one of the regular power-up items permanently. All of them can be acquired exactly the same way, but in different rooms of the Hotel. To reveal them, go to the rightmost bed in the corresponding room, jump on it not less than 7 times in row (like on the couch in the lobby to get to the upper floor). When landing on the bed for the 7th time, hold Up, then press A + B. The item will fall from the upper-right corner of the screen. The names, the corresponding items and its locations are described in the table below. Note, that jumping may be tricky. But there is a way to do it for sure. Press and hold Up in mid-air every time you jump up. While you holding it, the jumping counter is not resetting, even when you land and stand still on the bed. To perform next jump, release Up for very short time, press A to jump and hold Up immediately again.
Name|Location|Item
Roddy Magic|Hotel floor 11, Room 2|High jump item (Bell)
David Magic|Hotel floor 11, Room 4|Simple invulnerability item (Candy)
Nancy Magic|Hotel floor 14, Room 2|Super invulnerability item (Bottle)

Hon Shougi

(GEN) Cart RAM clear (added 15.06.17):
During the game, open the main game's menu, put cursor to the second option (SAVE/LOAD), hold Select and press A. Select one of two slots to clear and press A again.

Hong Kong

(GEN) Title screen cheats (added 15.06.17):
At the title screen, hold one of the following button combinations and press Start to get the corresponding effect.
A-Sound test.
B-Stage complete animation.
A + B-Hong Kong Block mini-game. Beat 6 stages to see the true game ending.
Source: urawaza.in, gamefaqs.com

Hook

(FIX) Cheat mode (added 15.06.17):
At the title screen, press Right, Up, Up, Down, Down, Right, Left, Up. A sound will confirm correct code entry. There are several options available now. At the title screen, press Left to see the ending. At the Map screen, select location and press Select to skip to in instantly.
Source: gamefaqs.com

Hudson Hawk

(FIX) Title menu cheats (added 16.06.17):
At the title screen, when "PRESS START" message is displayed and when you can choose to ON or OFF the Music and SFX, before the demonstration begins, enter one of the following button sequences. If done right, the "CHEAT SCREEN" will be displayed. You can toggle the cheat mode ON and OFF and return back to the the title screen. When cheat mode is ON, there are a couple of options available during the game, all described in the table below.
Up, Left, Down, Right, Right, Down, Left, Up-Infinite lives
Press Select during the game to kill all enemies on the screen.
Hold B, then press Select to skip current Level part.
Hold B + Up, then press Select to instantly complete current Level.
Also if mode is ON, the demo sequence will play incorrectly.
Source: gamefaqs.com
Select, Select, Select, B, A, B, Start-All effects enabled by the previous cheat.
Invulnerability to all Enemies, its projectiles and deadly objects (including alarm floors). You still can die in the ground pits, but since the lives are infinite anyway, that's not a problem.
Hold Select, then press Start to toggle the Level view mode using the D-Pad button. However, this doesn't mean you can put your character at any position of the level.

Hugo 2

(UNI) Secret message (added 21.06.17):
Complete the game on the "SCHWER" ("Hard") difficulty without losing any lives and with not less than 50 gold bags collected during the game (only the completed levels counts). Then after the Credits roll you'll see an addiotional dedication screen with name: "JANINE LEA".

(UNI) License screen cheats (added 21.06.17):
At the License screen, enter the button sequence A, B, Left, Down, Right, Up, A a number of times corresponding to the desired cheat described in the table below. Note, every time you complete one sequence, a sound will play. Worth to mention, that the cheat test code meant to have 3 different codes which you need to input one after another to enable the cheat with a corresponding number, but in the release version all three sequences are the same so you just need to repeat them.
1 Time-Infinite lives in all Stages
2 Times-In the Woods level, the Logs won't kill you anymore.
3 Times or more-Unused, does nothing.

(BUR) Game genie (added 21.06.17):
0_A‑71F‑E66-Use the codes, where "_" is the number from 0 to 2 to switch the game to a different languages (English, Portugese and French correspondingly). The game has default language hardwritten in the ROM - 3 (German). Most of the Language tables are points to the same German phrases, only the menu is fully translated (Portugese has a bug in it, however), as well as the intro phrase for all other languages is "GAME OVER".

Humans, The

(GEN) Sacrifice (added 22.06.17):
During the game, on any level, except levels 1, 7 and 21, press Select + Down to open the Sacrifice menu. You can exchange one or more humans to one of the tools instantly.

Hunchback of Notre Dame, The - Topsy Turvy Games

(GEN) Secret passwords (added 22.06.17):
This password is for the Chiseler game mode only. After entering this password, the game will return to the password entry screen without any indication.
PSCGM-Cheat mode. During the game, press A to increase amount of lives. Press Select to skip to the next stage.
Source: tcrf.net, gamefaqs.com

(FIX) Secret passwords (added 22.06.17):
There is a complete list of FunFair tickets. At some point during any of 5 mini-games you can unlock the Challenge mode for a corresponding game. Then the game will generate the Tickets which contains info about all unlocked Challenges. Upon entering the Ticket in a FunFair mode, the Wheel of Fortune will randomly select one of the unlocked games to play random Challenge. In the table below, "P" stands for "Picture Puzzle", "U" - "Upsy Daizy", "F" - "Catch the Fool", "D" - "Djali Bowling" and "C" - for "Chiseller", "+" means the corresponding game is unlocked in a particular Ticket.
Ticket|P|U|F|D|C|
04419|-|-|-|-|+|Source: gamefaqs.com
75939|-|-|-|+|-
95567|-|-|-|+|+
76431|-|-|+|-|-|Source: gamefaqs.com
75407|-|-|+|-|+
55762|-|-|+|+|-
41403|-|-|+|+|+
59269|-|+|-|-|-
38793|-|+|-|-|+
44722|-|+|-|+|-
76792|-|+|-|+|+
54146|-|+|+|-|-
13258|-|+|+|-|+
10017|-|+|+|+|-
59657|-|+|+|+|+
41389|+|-|-|-|-
41858|+|-|-|-|+
19566|+|-|-|+|-
83203|+|-|-|+|+
25112|+|-|+|-|-
58415|+|-|+|-|+
34693|+|-|+|+|-
24872|+|-|+|+|+
41984|+|+|-|-|-
75478|+|+|-|-|+
30434|+|+|-|+|-
68066|+|+|-|+|+
67782|+|+|+|-|-
83840|+|+|+|-|+
39074|+|+|+|+|-
11320|+|+|+|+|+

Hunt for Red October, The

(GEN) Stage select (added 23.06.17):
At the title screen, press B, Select, Left, Right, Start.
Source: gamefaqs.com

(FIX) Course map cheats (added 23.06.17):
At the course map screen, hold A + B, then enter one of the following cheat sequences. They cannot be combined, so choose wisely.
Select, Up, Down-Extra 25 lives
Up, Down-Extra 25 missiles
Left, Right-Extra 25 cloaks
Source: gamefaqs.com

Hyper Lode Runner

(UNI) Password generator (added 23.06.17):
Level:
Use counter:
Random:
Password:


Ikari no Yousai 2

(GEN) Secret passwords (added 26.06.17):
"ANAI "-SD mode, girl head 1.
"MAI "-SD mode, girl head 2.
"BOSS2"-SD mode, girl head 3.
"VIVA!"-Girls dance screen, then Ending.
Source: gamefaqs.com

Incredible Crash Dummies, The

(GEN) Cheat mode (added 26.06.17):
At the title screen, press Up, Down, Left, Right to activate the cheat screen. Now enter any of these passwords from the table below.
57481235-Day 1
32054573-Day 2
29643724-Day 3
12715632-Day 4
58328765-Day 5
46875973-Easy difficulty
63442196-Normal difficulty
92347232-Hard difficulty
81212337-Very hard difficulty
56378152-Sound test
Source: tcrf.net, gamefaqs.com

Initial D Gaiden

(UNI) Unlock all (added 27.06.17):
Hold A + B + Select + Left + Down, then power up the console and wait until the title screen appears. This will unlock all 4 scenarios, 2 extra courses and 7 extra cars instantly.

Iron League

(UNI) Password generator (added 29.06.17):
Note, the Time Attack passwords are only for displaying results of your run, the "Stage" field ignored. On the other hand, the "Time" field ignored in Story Mode. However, both fields can be set to any valid value in both password types.
Game Type:
Level:
Time:
Random:
Password:


Ironman - X-O Manowar in Heavy Metal

(FIX) Secret passwords (added 30.06.17):
LSLSDB-Enables the debugging features.
During the game, press Start to pause, hold either A or B then press Start again to enter the Stage select menu.
Either on pause or during the game, hold Left and press Start to toggle the Stage select cheat OFF and ON again. A sound will be heard instead of toggling the Pause mode.
During the game, hold B + Start then press Up or Down to free move your character vertically at current horizontal position. Also, if you hold the same buttons mid-air while dodging after the enemy bullet hit, you can do the same horizontally but only inside current screen. However, due to hacky controls programming method, if you press Up being in free horizontal movement state you switch to free vertical movement state and couldn't control the horizontal movements anymore, but still have a horizontal velocity. So you can free walk through the level somehow. Also, being in a free movement state you are completely invulnerable, as well you won't meet bosses anymore.
Source: gamefaqs.com

Ishido

(UNI) Auto play (added 30.06.17):
At the title screen, setup any game mode and options, press Start then immediately hold A + B + Select + Start + Right for the Japanese version and A + B + Select + Right for the US version, then wait until the screen fades out.

Itchy & Scratchy - Miniature Golf Madness

(FIX) Title screen cheats (added 03.07.17):
At the title screen, enter one of the following cheats to get a corresponding effect. A sound will confirm correct code entry. Cheats may be combined.
Select, A, Down, B, Up, Down-Empty cheat, does nothing, only sound can be heard for it.
Right, A, Down, Right, A, Down-Invulnerability.
Select, Up, Up, Select, Left, Left-Stage select.
Source: gamefaqs.com

Itsudemo Nyanto Wonderful

(BUR) Hidden text (added 03.07.17):
The Cart RAM initialization routine uses following string at 0x39065 in ROM as a save data signature:
BUP MEMORY INITIALIZED V.14

Source: tcrf.net

J.League Fighting Soccer

(GEN) Auto play (added 04.07.17):
At the "HALF" selection menu for the "TEST PLAY" mode or at the "CONTINUE/START" menu of either the "TOURNAMENT" or "LEAGUE" modes, hold Select + Start, then press A. Now, both players will be CPU controlled and play automatically.
Source: urawaza.in

(BUR) Hidden text (added 04.07.17):
The Cart RAM initialization routine in this game uses a programmer's nickname as RAM signature:
SILPHEED


Jack Nicklaus Golf

(UNI) Secret message (added 11.07.17):
At the title screen, wait for "A SCULPTURED SOFTWARE presents" window starts to scroll out, hold Start + Select + Left and wait for the license window appear. Continue holding all the buttons about 7 seconds after that until the series of the secret dedication messages are displayed.
Source: tcrf.net

James Bond 007

(GEN) Secret names (added 15.07.17):
Enter one of these words as a player name when registering a new Save game slot. All names are unlockable and given to you after the credits screen when the game is beaten.
BACCR-Baccara mini-game
BJACK-Blackjack mini-game
REDOG-Red Dog mini-game
Source: gamefaqs.com

(BUR) Game genie (added 15.07.17):
0C1‑85F‑C46+F91‑8CF‑5D+701‑8DF‑B3B-Re-places the title screen with an unused version screen "JAMES BOND 11:23:97A", most probably a leftover from the developement stage.

Kaijuu-Oh Godzilla

(GEN) Sound test (added 02.06.17):
At the first title screen, press Select.

(UNI) Debug screen (added 02.06.17):
During the game, press Start to pause it, then press Up, Down, Up, Down, A, B, Right, Left, B, A, Down and additionally any button one more time. Here you can change the stage number, lives of the godzilla and more. Press B to exit back to the game. Press Select during the game to open Debug screen instantly.

Kung-Fu Master (USA), Spartan X (Japan)

Japanese version:

(FIX) Sound test (added 07.01.17):
At the difficulty selection screen, hold B, then press A.
Source: tcrf.net

(UNI) Stage select (added 07.01.17):
At the difficulty selection screen, hold Left, then press A 5 times, release Left, then hold Right and press B 3 times, release Right.

Kwirk (USA), Puzzle Boy (Japan)

(UNI) Linear course (added 10.05.16):
In the "Heading out" mode, the room course is random and rooms selection depends only on the skill level. But, if at the "Select display" screen you hold Left + Select before startin a game, the course will be always the same with linear room arrangement, but you can't select a number of rooms to play, it is fixed too and depends also on the skill level only.

Lucle

(GEN) Options menu (added 20.02.17):
At the title screen, enter Up, Down, Left, Right, A, B, B, A, B, A, B, A, A. A color of the "L" letter in the title screen will change indicating correct code input. Now start a new game.
Source: makainyumon.web.fc2.com

(BUR) Hidden text (added 20.02.17):
The SRAM init signature in this game contains some devs credits:
KOJI-YOSIDA 5963


Maus, Die

(UNI) Stage select:
At the license screen, quiclky enter A, B, Up, Down, Down, A, Left. During the game, on pause, hold A + B and change the level number with D-Pad buttons, then unpause. Or just hold A + B and unpause to skip to the next level.

(UNI) Infinite lives:
At the license screen, enter Up, Left, Right, Down, Left, Up, Right, Up, Down, Right, Up, Right, Down, Left, Left, Down, Right.

(UNI) Secret message:
At the license screen, enter Up, Left, Down, Left, Up, Right, Down, Up, Right, Up, Right, Down, Left, Up, Down, Right, Down, Up, Down, Up, Right, Up, Left, Up, Right. Complete the game (you can use the Stage select cheat as well). After the credits roll is over, hold Up + Right + B, then press Start. The dedication screen will appear, the same as in some other Bit Manager's games.

Meitantei Conan

(UNI) Secret passwords (added 15.08.16):
MGTEST-Test screen. Allows you to play any mini-games or play the game with all events completed by default.

Metal Jack

(BUR) Game genie (added 17.01.17):
386‑C5E‑2AA-There is an error handler hidden in a couple of GB/GBC games by the same developer ("Chiki Chiki Tengoku", "Cyber Formula GPX" and many GBC titles). All them are functional, but can't be seen in no errors are happens. Most of games has its font loading routine removed, so you can't see something anywai. Surprisingly, this one particular game has the fonts and its loading intact, so you may see this error handlers somehow. Use this code, thep press Start at the title screen.

Metroid II - Return of Samus

(BUR) Game genie (added 08.08.16):
AAKKLXNZ-Re-enables the debug mode.
On pause:
Press Left/Right to select item, press A to toggle item.
Press Up/Down to change weapon (valid values are 0,1,2,3,4 and 8).
Hold B, press Left/Right to change max number of energy tanks.
Hold B, press Up/Down to increase max number of missiles by 10 (decreasing only affects current number of missiles), max missiles are 9999, only 999 will be displayed.
Hold A + B, press Left/Right to change the metroids counter.
During the game:
Hold B + Select while transiting between two different locations (i.e. from the starting location to the first cave or back) to jump directly to the Final Boss.
Source: tcrf.net

Nakajima Satoru - F-1 Hero '91

(UNI) Password generator (added 29.03.17):
Note, that there are no passwords given to you by the game after completing Level 8, but the password generation system supports level numbers up to 9, which renders as a special secret case to see an instant ending.
Team:
Level:
Random:
password:


Nectaris GB

(GEN) Quick start mode (added 14.05.17):
This mode is unlockable. When you complete all Story and all Legend modes, the "QUICK START" option will appear in the game's "MAIN MENU". This option allows you to play any both Story and Legend maps either in 1PLAYER or 2PLAYER (on the same GB console in turns) modes. Also, you can choose here to play as "GUICY" instead of "UNION" on the same regular maps, just like in the PCE version.

(GEN) Secret passwords (added 14.05.17):
Note, two secret sets of passwords enables the Advanced maps for both regular game modes. All passwords here are just regular passwords for the corresponding maps written backwards. Also, there is a set of 44 secret passwords for every Campaign Mode maps available in GB version: "EMAPxx", where "xx" is a map number from 01 to 44 (last four corresponds to the "SPWinners" maps), but since they can be accessed at any time from the "Campaign maps" menu, they are actually don't needed.
-Story Maps Advanced (GB Exclusive)
NEVETS-Map 01
LARTSA-Map 02
ELKCEH-Map 03
GNIMER-Map 04
REYETS-Map 05
EHTLAW-Map 06
TUBMUN-Map 07
FATSUG-Map 08
CIDRAD-Map 09
ELLSEK-Map 10
YNWORB-Map 11
OTEREB-Map 12
RENERG-Map 13
TREGER-Map 14
AMALAS-Map 15
TCENOZ-Map 16
-Legend Maps Advanced (PCE Campaign)
TLOVER-Map 01
SURACI-Map 02
ONARYC-Map 03
YESMAR-Map 04
NOTWEN-Map 05
ACENES-Map 06
ENIBAS-Map 07
SUTARA-Map 08
SIOLAG-Map 09
NIWRAD-Map 10
LACSAP-Map 11
YELLAH-Map 12
NAMROB-Map 13
OLOPPA-Map 14
RESIAK-Map 15
ROTCEN-Map 16
Source: nectaris.tg-16.com

Pocket Bomberman

(UNI) Secret power-up (added 12.05.17):
At the Stage name and number screen in normal game mode, press Left, Right, Left, Right, Up, Down, Up, Down, B, Left, B, Right, B, Up, B, Down, then press Start or A to begin to play. This will enable the special in-game counter which counts the bombs you placed on the stage. When counter reaches the predefined value (different for every area), the sound will be heard and a small flower-like prize will appear near the exit door. Get it to power-up to MAX bomb count, MAX explosion range and get the manual controlled primer. Note, this cheat works only for areas 1 to 4, and if bombs count and explosion range both less than 3. Also note, when you dies or moves to the next stage, the secret is resetting, so you must input the cheat again. The following table contains a numbers of the bombs needed to be placed on every area in order to obtain the Secret power-up.
|Area 1|Area 2|Area 3|Area 4
World 1|10|20|30|15
World 2|20|30|40|15
World 3|20|30|30|15
World 4|15|20|30|20
World 5|20|30|10|20

(BUR) Game genie (added 12.05.17):
0F2‑BDC‑E6E-Restores the disabled Debug menu at the game's boot-up. Note, you just couldn't see any readable text due to lack of proper font, to fix you need to hack it in manually.
Source: tcrf.net

Rampart

(BUR) Game genie:
5F3‑CEB‑7FC-Select 1 PLAYER game, then enter options. The Sound test will appear instead.
Source: tcrf.net

Sachen 4-in-1 Vol. 1 - Street Rider

(BUR) Game genie (added 13.05.16):
5C2‑28F‑7F6+F72‑27F‑F7B-Unless many other games by Commin, this one has a fully functional "Creatronic" logo, which may be easily re-enabled by these codes.

Sachen 4-in-1 Vol. 5 - Magical Tower

(BUR) Game genie (added 12.05.16):
112‑6AF‑B32+252‑69F‑E64-Re-enables the unused "Mega Duck" logo at the game boot.

Sachen 4-in-1 Vol. 5 - Worm Visitor

(UNI) Ending and credits (added 12.05.16):
At the title screen, hold A, press and release B twice, release A, hold B, press and release A twice, release B, finally press Start.

(UNI) Secret credits (added 12.05.16):
Complete the game, or just enter the "Ending and credits" cheat as described above. At the credits roll, enter the same cheat again to acces the secret ending with more deveoloper names in Chinese.

Sachen 4-in-1 Vol. 6 - 2nd Space

(UNI) Stage select (added 10.05.16):
At the title screen, when message "PUSH START" appears, press Down + A + B + Select. Now, and the Stage number screen press Left or Down to select any level.

(BUR) Game genie (added 10.05.16):
052‑A5F‑E66+B92‑A4F‑4CE-Re-enables the unused "Mega Duck" logo at the game boot.

Sachen 4-in-1 Vol. 6 - A-Force

(BUR) Unused cheat:
At the title screen, press Select, A, A, B, B, Down, Up, Left, Right, Select. The new game is starting immediately. There are no other effects except a sound effect, which seems immediately overwries with the new game start sound.

(BUR) Game genie (added 11.05.16):
6E7‑608‑E6A+637‑5F8‑B34-Re-enables somehow the unused "Creatronic" logo instead of the stage screen. Due to lack of proper initialization code, it need more hacking to properly display without glitches during the game.

Sachen 4-in-1 Vol. 6 - Black Forest Tale

(UNI) Credits (added 11.05.16):
At the title screen, Hold A, press and release B twice, release A, hold B, press and release A twice, release B.

(UNI) Restore lives, money and items (added 11.05.16):
During the game, face the character in northern direction, press Start, then press Up + A + B + Select. An extra 9 lives, 111 coins and all powerups will be refilled.

(BUR) Game genie (added 11.05.16):
420‑1AB‑E66+050‑19B‑6EB-Re-enables the unused "Mega Duck" logo at the game boot.

Sachen 4-in-1 Vol. 7 - Ant Soldiers

(UNI) Ending (added 13.05.16):
At the title screen, hold A, press and release B twice, release A, hold B, press and release A twice, release B, finally press Start.

(UNI) Level skip (added 14.05.16):
During the game, press Start to pause then hold A, press and release B twice, release A, hold B, press and release A twice, release B.

(BUR) Hidden text (added 13.05.16):
There is a hidden version number string at the beginning of the ROM:
93/06/03VER:002

Source: tcrf.net

Sachen 4-in-1 Vol. 7 - Dan Laser

(GEN) Stage select (added 16.05.16):
At the title screen, press A + B + Select + Start. Numbers from 1 to 7 is a regular levels, number 8 is an ending, number 9 is a special credits screen, never seen an any other way in this game. Cheat itself is unlockable and is given to you by the game if you finish it once.

(UNI) Maximum powerups and restore lives (added 16.05.16):
During the game, press Start to pause it then hold A, press and release B twice, release A, hold B, press and release A twice, release B. Press Start to unpause the game, and you'll obtain full weapons, powerups and restore lives to 9.

(BUR) Hidden text (added 16.05.16):
There is a hidden build date string at the beginning of the ROM:
SHOOT ! 93/07/19

Source: tcrf.net

Sachen 4-in-1 Vol. 7 - Zoo Block

(GEN) Ending (added 17.05.16):
At the title screen, press Left, Right, A, Right, Left, B.
Source: gamefaqs.com

Sachen 4-in-1 Vol. 8 - Explosive Brick

(GEN) Extra stage 33 (added 17.05.16):
At the title screen, press Left, Left, A, Right, Right, B.
Source: gamefaqs.com

(GEN) Extra stage 34 (added 17.05.16):
At the title screen, press Right, Right, A, Left, Left, B.
Source: gamefaqs.com

(GEN) Credits (added 17.05.16):
At the title screen, press Left, Right, A, Right, Left, B.
Source: gamefaqs.com

Sachen 4-in-1 Vol. 8 - Magic Maze

(BUR) Game genie (added 17.05.16):
402‑3AF‑5DD+4F2‑3BF‑B3A-Unless many other games by Commin, this one has a fully functional "Creatronic" logo, which may be re-enabled somehow by these codes. Unfortunately, this code does not allow you play the game.

Sachen 4-in-1 Vol. 9 - Crazy Burger

(GEN) Ending (added 17.05.16):
At the title screen, press B, A, B, B, A, A, B, B, Select, then start a new game.
Source: gamefaqs.com

Sachen 4-in-1 Vol. 9 - Deep: Final Mission

(BUR) Game genie (added 17.05.16):
4B2‑13F‑A2B+052‑14F‑C4E-Re-enable an unused Mega Duck logo at game boot. Unfortunately, this code does not allow you play the game.

Sea Battle (Europe), Schiffe Versenken (German), Bataille Navale (France)

(UNI) Secret message:
Wait for the demonstration starts after the title screen. On the developers credits screen, hold Up + Right + Start. While screen is white, release Right only. You'll see a dedication screen the same as in many other Bit Manager's games.

Super B-Daman - Fighting Phoenix

(BUR) Game genie (added 14.05.17):
013‑09F‑E6A-Enables a couple of debug features:
Any time during the game, hold Select, then press B to stop the game. Press B to unhold it back.
Hold A + B + Select, then press Start to soft-reset the game.
During the game in "BiDa" mode, press Select to enter the "TEST MODE SET" where you can change the parameters of the current stage.
At the Mode select menu, select the "Caravan mode", hold Select and press A or Start to see the ending.
During the game in the "Caravan mode", hold Select and press Start to instantly return back to the Mode selection menu.
In "JBA" mode, enter the "BINGO" screen, press Start to instantly see the item at the corresponding bingo position.
At the "JBA" mode select screen, put cursor to "Data Save" option, hold Select and press A or Start to enter the Bingo field edit mode.

Super Chase H.Q.

(BUR) Game genie (added 25.08.16):
088‑F2F‑082-Re-enables the Stage select mode at the title screen upon starting a new 1p game.
0D8‑F2F‑082-Re-enables the Sound test mdoe at the title screen upon starting a new 1p game.
469‑06F‑D51+679‑07F‑C47-Show an unused "SIO ERROR" screen instead of Options menu.
Source: tcrf.net

Super Hunchback

(UNI) Test mode (added 10.06.16):
At the title screen, hold Select, then press Right, Right, Left, Left, A, B, Up, Down. You'll be able to select any stage, see the ending and obtain an infinite lives.
Source: tcrf.net

Tale Spin

(GEN) Stage select (added 28.02.17):
At the title screen, hold Down + Left + A, then press Start.
Source: gamefaqs.com

(UNI) Invulnerability (added 28.02.17):
Enter the Stage select mode as described above. Choose any stage, then hold A + B and press Start. You'll be fully invulnerable to enemies and its projectiles, but still can stuck in the obstacles. Additionally, if choose a Bonus stage you'll see the secret message "THANKS YOU FOR PLAYING" after this stage is over. Note, this is not an actual Bonus stage, there is no scroll and you couldn't collect any items, you just can wait for the timer is over or skip it with Left + Right + Down buttons at the same time.

Teenage Mutant Ninja Turtles (Japan), Teenage Mutant Ninja Turtles - Fall of the Foot Clan (USA), Teenage Mutant Hero Turtles - Fall of the Foot Clan (Europe)

(GEN) Refill energy (added 19.06.16):
During the game, press Start to pause it, then enter Up, Up, Down, Down, Left, Right, Left, Right, B, A. This can be done only once per game, however.
Source: gamefaqs.com

(GEN) Hidden minigames (added 19.06.16):
At the Configuration screen, press A + B + Select. A question mark will appear next to the 5th stage option. Select it to be able to play one of the three hidden minigames.
Source: gamefaqs.com

Teenage Mutant Ninja Turtles 3 - Turtles Kiki Ippatsu (Japan), Teenage Mutant Ninja Turtles III - Radical Rescue (USA), Teenage Mutant Hero Turtles III - Radical Rescue (Europe)

(BUR) Game genie (added 21.06.16):
E8B‑40F‑809+37B‑41F‑E6A+357‑E9C‑2A6 (for the US version)
7BB-43F-809+37B‑44F‑E6A+357‑7CC‑2A6 (for the Japanese version)
-Re-enables a simple Debug mode. To activate it, press Down + Select any time. Additional Game genie code needed to fix somehow the auto-lock of this handler to itself.
However, the code still may be locked up if you press the same combination being in the Debug mode. To exit it use only the Select button!
While in the Debug mode, during the game:
Right - toggles the Invulnerability on/off.
Down - gives an extra Pizza.
A - sets some vars, need to investigate.
Start - toggles the Free mvement mode on/off
...or at the Password screen:
Up - starts some kind of a counter on the password string, presumably used at the developement stage.

Turok - Battle of the Bionosaurs

(UNI) Sound test:
At the title screen, put cursor to "PASSWORD", then hold Up and press Start.

(FIX) Secret passwords:
ZYDRTRKWPS-Infinite ammo.
ZYDRTRKLVS-Infinite lives.
ZYDRTRKNRG-Infinite energy.
ZYDRTRKBRD-Bird mode. During the game hold Select, then press A. Move your character to any position. Hold Select and press A again to put it back.
ZYDRTRKLVL-Stage select. On pause, press A + B.
CGRZYDLYNY-Secret message. Although it says "BAD PASSWORD", hold Up + Right + B before exit back to the title screen and press Start so see a dedications screen, same as in other Bit Manager's games.
Source: gamefaqs.com

(BUR) Game genie:
009‑1CA‑80A+009‑1DA‑D55 (for the US version)-Replaces the pause during the game with Frame advance mode. Press Start, then Select to advance to the next frame.
489‑16A‑D5F-Re-enables the debug memory view. With this code and the Stage select password, press A + B on pause to enter it.

We're Back! - A Dinosaur's Story (USA), Baby T-Rex (Europe), Agro Soar (Australia), Bamse (Sweden)

(FIX) Cheat sequences:
All cheats should be entered at the title screen. You can enter any number of cheats, all effects will be combined.
Select, A, Down, B, Up, Down-Infinite lives.
Up, Down, Up, B, Left, B-Infinite time.
Select, Up, Up, Select, Left, Left-Stage select.
Right, A, Down, Right, A, Down-Invulnerability.
B, A, Right, B, A, Right, A-Infinite projectiles.
Up, B, A, Down, B, A-All cutscenes and Credits. This cheat is actually working only in the Australian and the European versions. Other versions has it, but entering this cheat will hang the game. However, for the Sweden version the Game genie code 002-7EF-C4D may be used to re-enable it, but unfortunately you can see only the last cutscene screen which is replaces the Credits in this version.
Left, A, Left, B, Left-Credits. This cheat actually working only in European version. There is no such cheat in Australian version at all, for the rest of regional versions this cheat should show the credits, but does the same as a previous one: nothing (unless you are using the Game genie code for the Sweden version).
Source: gamefaqs.com

 

Designed with LAYOUT TECHNIQUES by www.glish.com/css