Mostly Unpublished NES Cheats ;)

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

  JJ - Tobidase Daisakusen Part 2, 3-D Battles of World Runner, The
  Jackal
  Jackie Chan, Jackie Chan's Action Kung Fu
  Jajamaru Gekimaden - Maboroshi no Kinmajou
  Jajamaru Ninpou Chou, Taro's Quest (Prototype)
  James Bond Jr
  Jangou
  Jarinko Chie - Bakudan Musume no Shiawase Sagashi
  Jaws
  Jesus - Kyoufu no Bio Monster
  Jetsons, The - Cogswell's Caper!
  Jia A Fung Yun (Waixing)
  Jigoku Gokuraku Maru, Kabuki - Quantum Fighter
  Jikuu Yuuden - Debias
  Jin Yong Qun Xia Zhuan - Shu Jian Jiang Shan (Nanjing, NJ031)
  Jimmy Connor's Tennis
  Jing Ke Xin Zhuan
  Jongbou
  Journey to Silius, Raf World
  Journey to the West (Micro Genius)
  Joust
  Jovial Race
  Joy Mech Fight
  JuJu Densetsu, Toki
  Jumbo Ozaki no Hole in One Professional
  Jumpin' Kid - Jack to Mame no Ki Monogatari
  Jungle Book, The
  Jurassic Park
  Just Breed
  Juuouki
  Juuryoku Soukou Metal Storm, Metal Storm
  Juvei Quest

Cheats summary:
generic cheats-11
unique cheats-25
buried secrets-17
fixed generic cheats-6
unverified games-1
games with secrets-32
games with no secrets found-12

JJ - Tobidase Daisakusen Part 2, 3-D Battles of World Runner, The

All versions:

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

(GEN) Hard mode:
At the title screen, press Start, then when the "PRESS START TO BEGIN" message is displaying, press B, B, B, B then hold Up + Left and press Start on controller 1. In this mode, all enemies are movig faster. This cheat is unlockable, and revealed if you beat the game once.

Japanese version:

(BUR) GameGenie (added 03.08.13):
AAEAGENY-Re-enables 3D-mode selection cheat. By default in the Japanese cartridge version, 3D-mode was forced to single colored left/right frames. With this code you can press hold Select at the title screen then press Start to switch 3D-mode to the red/green colored frames mode, just like in the FDS version.

US version:

(BUR) GameGenie (added 03.02.14):
NYEAGAAE-Re-enables 3D-mode selection cheat. By default in the US version, 3D-mode was forced to red/green colored left/right frames, the same as for the FDS version. With this code you can press hold Select at the title screen then press Start to switch 3D-mode to the single colored frames mode, like in the Japanese cartridge version.
OZEEAAAV-Re-enables the disabled starting copyright screen, which is a copy of the FDS games disclaimer, but for Famicom Computer. The same screen is present in the Japanese version, but it was much more more damaged, but still can work with more patching.

Jackal

(FIX) Borrow life (added 31.12.13):
During two-player mode, when one of the players run out of lives and the "GAME OVER" message is displaying, press on the corresponding controller A + B, you'll borrow a spare life from another player if any.

Jackie Chan, Jackie Chan's Action Kung Fu

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

(FIX) Extra 99 continue:
Enter the Level Select mode and press B on controller 2.

Jajamaru Gekimaden - Maboroshi no Kinmajou

(GEN) Refill HP:
At the very end of the game, enter the village by the sea (use the secret name trick to reach the final boss, loose and you'll appear at exactly needed village), reach the 4th screen of the town and enter the lower-left house (it should be empty). Once inside, press A, Up, Up, Down, Right, B, Down, Left, Right, Left on controller 2. Leave the house and come back in again. If done right, there will be a couple of kids ready to refill your HP.
Source: ReyVGM

(GEN) Refill MP:
At the very end of the game, enter the village by the sea (use the secret name trick to reach the final boss, loose and you'll appear at exactly needed village), reach the 4th screen of the town and enter the lower-left house (it should be empty). Once inside, press Down, Down, Up, Up, Right, Left, A, Right, B, Left on controller 2. Leave the house and come back in again. If done right, there will be a bird ready to refill your MP.
Source: ReyVGM

(UNI) Sound test (added 03.01.14):
At the very end of the game, enter the village by the sea (use the secret name trick to reach the final boss, loose and you'll appear at exactly needed village), reach the 4th screen of the town and enter the lower-left house (it should be empty). Once inside, press Up, Down, Up, Down, B, Left, Right, Right, Left on controller 2. Leave the house and come back in again. If done right, there will be a blue ninja, when you press A on it, the bacgroung music will change, cycling throught all game music.

(UNI) Secret words (added 03.01.14):
Enter one of the following words as a player name during new save slot creation. Any slot can be selected. Additionally, for all names except for the first one, B on controller 2 should be held before the intro sequence is over. Note, that some names starts with the space character denoted as "_" in following table.
_かわいい_たくらみ-The final battle. No matter if you win it of loose, when you return back to the map, the game will over and you can see the ending.Info from ReyVGM
みこちゃん-Infinite items.
しのふ゛をち-Infinite items.
し゛ゅんちゃん-Debug name, gives to you an infinite items and your weapon will be all powered up. Also, allows you to skip action levels on map, just hold B and move through the map. Additionally this cheat allows you to see all game locations. Enter the map mode, press Select. The number in the middle of HUD will display current location index. Press Up or Down to change it, press A to apply changes, now the number will display current sublocation index. Change it the same way, press A to advance to selected location. Unfortunately, the screen won't update automatically, in order to see the new location, enter the game menu and return back. Be careful, some indexes aren't correct and can hang the game or you couldn't exit it at all.
ひめりん-Infinite items and your weapon will be all powered up. Also, allows you to skip action levels on map, just hold B and move through the map.Info from ReyVGM

Jajamaru Ninpou Chou, Taro's Quest (Prototype)

Prototype version:

(UNI) Scenario warp (added 06.03.15):
Start a new game. During the intro breifing, hold B on controller 2 to start with Hanna from second part of scenario. In the Japanese version ths can be done with simple scenario selection at the game start.

James Bond Jr

(FIX) Secret passwords:
012345-Sound test
888888-View credits
181287-Unlimited bullets, 99 lives, 99 mins
170167-Easy enemies
200888-Silly hard enemies

(BUR) Hidden text (added 09.12.08):
There is some hidden copyright text in ROM:
(C) COPYRIGHT 1990/91/92 EUROCOM ENTERTAINMENT
Also the RESET routine uses this string to check if the game was soft or hard reset
euro!


Jangou

(UNI) SRAM clear (added 28.05.14):
Hold Up + Start, before the title screen appears, or just press Reset.

(UNI) Pause mode (added 29.05.14):
Hold B + Start, before the title screen appears, or just press Reset. In this mode, all players can make the moves, only after any button is pressed by the player, so you have a lot of time to think during game.

(BUR) GameGenie (added 29.05.14):
GAONZNSE-Re-enables the Autoplay mode cheat. Hold A + Start, before the title screen appears, or just press Reset. Your side will be CPU controlled, just watch the game. Unfortunately, the AI for the play is very weak, so it couldn't win most of the time.

Jarinko Chie - Bakudan Musume no Shiawase Sagashi

(UNI) Disabled cheat:
Press Up, Up, Down, Down, Left, Right, Left, Right, B, A at the title screen, a sound will confirm correct code entry. Does nothing.

Jaws

(UNI) Sound test (added 20.05.11):
Hold Up + Left + B on controller 2, then press Reset. At the title screen, on controller 1 press Left/Right to increase/decrease sample index by 1, press Up/Down to increase/decrease sample index by $10. Press A to play sample, press B to stop playing.

(UNI) Cheat mode (added 20.05.11):
Enter the Sound test cheat. During the game, enter pause mode, then hold one of the following buttons on controller 2 and exit pause mode to get corresponding effects:
A-For the map mode: enter "You've hit Jaws!" instantly.
For the diving mode: exit diving instantly.
B-For the map mode: enter "You've hit something!" instantly.
For the diving mode: kill Jaws instantly and go to the boss fight.
A + B-For the diving mode only: get extra 9 lives.

(BUR) Hidden text (added 20.05.11):
There is some hidden copyright text in the ROM:
(c)1987 LJN TOYS,INC.
TM&(c)1987 UNIVERSAL CITY STUDIOS,INC. ALL RIGHTS RESERVED.
LICENSED BY MERCHANDISING CORPORATION OF AMERICA,INC.
LICENSED BY NINTENDO OF AMERICA,INC.


Jesus - Kyoufu no Bio Monster

(UNI) Secret passwords (added 15.07.09):
ふあみこん せいさくの なかまたち みせてくれ-Secret staff message. First, a normal staff roll appears, then a secret staff roll will be displayed.
もつくんは わかままて れいさろん ひきたかる-Piano mini game. You can play simple melodies by pressing piano keys.
はいもとの えみさんへ とくさんの よめにこい-The same as previous, but with extra palette edit mode.
たくりんは おんかくか ききたいと ないてるし-Sound test with pictures. Each melody assigned to according game picture and have name in Japanese.
さりゆくも のたちきら めくひとみ そらのはて-The same as previous.

Jetsons, The - Cogswell's Caper!

US version:

(BUR) GameGnie:
VOOOGONU-Enables Level select screen after pressing Start at the title screen. CHRSET don't work, because using missing code parts at address $6000 that game in final release didn't using.
Source: BMF54123

Japanese version:

(BUR) GameGnie:
UXXOPOKK-Enables Level select screen after pressing Start at the title screen. CHRSET don't work, because using missing code parts at address $6000 that game in final release didn't using.

Jia A Fung Yun (Waixing)

(UNI) Hidden credits (added 30.05.14):
At the title screen, press A, B, Up, Down, A, A, B, Start.

Jigoku Gokuraku Maru, Kabuki - Quantum Fighter

All versions:

(GEN) Sound test:
Complete the game, then after the Credits have rolled, hit B.

(GEN) Chip swap:
During boss fight, press Start to pause the game, then press Up or Down to convert your chips into HP or HP into chips accordingly.

(UNI) Level select:
At the title screen, on controller 2 press A 8 times, B 4 times, Right 16 times, then press Start. This also activates a debug mode of sorts. During the game play, Up and Down on controller 2 can be used to alter the player's chip levels, and pressing A on controller 2 will skip the level.
Source: BMF54123

US version:

(UNI) Sound test (added 30.05.14):
Additionally to the ending screen, the Sound Test mode can be enabled at the game start. At the HAL logo, when animation stops, press Down + B + Select.

Jikuu Yuuden - Debias

(UNI) Secret passwords (added 04.03.13):
ふりきちすとoけoつぬつらえもすはひりはへoよくすはひりむけつ゛-Debug Mode.

Jin Yong Qun Xia Zhuan - Shu Jian Jiang Shan (Nanjing, NJ031)

(UNI) Secret message (added 21.05.14):
During the game, while in conversation mode, hold Up + Select + Start on controller 1 and skip with A to the end of the dialog. The copyrigh string will be displayed in the dialog box. This cheat can be found in a couple of Nanjing games on the same engine.

Jimmy Connor's Tennis

US version:

(BUR) Hidden text (added 16.07.09):
NTSC Version
Jimmy Connors Tennis for the N.E.S.
Built Friday 19th March 1993.
(c) Copyright UBI Soft 1993.


European version:

(BUR) Hidden text (added 16.07.09):
PAL Version
Jimmy Connors Tennis for the N.E.S.
Built Wednesday 17th February 1993.
(c) Copyright UBI Soft 1993.


Jing Ke Xin Zhuan

(UNI) Soft reset (added 02.06.14):
During the game, press Select + Start.

(UNI) Maximum stats (added 03.08.13):
At the title screen, press Down, Down, A, Up, Up, B, Left, Right, Select. Now, very time you press A during the game play, you'll renew HP/MP and exp parameters at its maximum.

(UNI) Debug cheat (added 03.08.13):
During the game, press Select, Select, B, Right, Right, Select, a sound will confirm correct code entry. You can now free walk on any maps, as well this will disable the random encounters. Press Start to disable this cheat back or press B, B, B to warp directly to the end of the game (the clothes will change and your wife is coming).

(UNI) Instant kill (added 02.06.14):
During the fight sequences, press Down, Up, Up, Down, Left, Left. Now press Select to instantly kill your enemy.

Jongbou

(GEN) Continue (added 04.08.13):
At the title screen after the game over, press Down, Up, Left, Right, Start.
Source: ReyVGM

Journey to Silius, Raf World

(GEN) Sound test and Extra 9 continue:
Press B 33 times then Start at the title screen. A sound test option will be available. Additionally, nine continues will be available when game play begins.

(BUR) GameGenie:
XTUSKTAV-Activates the game's stage select. A or B changes the starting level, and Start starts the game.
TEXINTIA-Additionally enables final boss selection at stage select screen.
Source: Chris Covell

Journey to the West (Micro Genius)

(UNI) Invulnerability (added 02.06.14):
At the title screen, press Select, Up, Select, Down, Select, Left, Select, A.

(UNI) Ending sequence (added 02.06.14):
At the title screen, press Select, Up, Select, Down, Select, Left, Select, B and start a new game.

(UNI) Stage select (added 02.06.14):
At the title screen, press Select, Up, Select, Down, Select, Left, Select, Right.

Joust

US version:

(BUR) Hidden text (added 27.11.08):
The RESET routine in this game uses string
MIYA AOKI
to check if game was soft or hard reset.

Jovial Race

(UNI) Extra 29 lives:
At the title screen, after two car crashes, press A, B, Up, Down, Up, Down, B, A, then any other button except A and Start.

(UNI) Stage select (added 02.06.14):
At the title menu, press Up, A, Down, A, Left, B, Down, A, Right, A, Left, B, A, then any other button except A and Start. Press A or B to change the stage number by 5 up to 46.

Joy Mech Fight

(GEN) Secret fighters (added 04.08.13):
Select any game mode at the main game menu, except "1P Quest", and press A + B + Select + Start at the same time.

(GEN) Sound test (added 04.01.14):
At the title screen, press B + Select.

JuJu Densetsu, Toki

(BUR) GameGenie (added 26.12.08):
PEKYVYAA-Enables debug mode. Invulnerability is enabled, level select is enabled. To select level press A on player select menu. During game, press Start to pause it, hold Select and press A to skip current stage, or press B to commit suicide.

Jumbo Ozaki no Hole in One Professional

(UNI) Twice strike power (added 04.08.13):
During the game, press B to select the close view of the hole. Hold Up + Left on controller 1, then press Down + Right on controller 2 a small number will appear to the left of the player character. A Number "2" means the cheat is on, "1" means the cheat if off. If enabled, every time you beat the ball, it will fly a lot more farther than usual, due to strike power increased twice.

Jumpin' Kid - Jack to Mame no Ki Monogatari

(BUR) GameGenie (added 03.06.14):
PASVEZAA-Re-enables the invulnerability cheat. At the title screen, press Up + Select.

Jungle Book, The

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

Jurassic Park

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

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


Just Breed

(BUR) GameGenie (added 09.07.14):
XTKKTPAV-Re-enables the debug features. Any time during the game, press Select + Start to pause it. Press Up + Select to enable the Sound test menu.

Juuouki

(FIX) Debug mode:
Hold Down then press Reset. This will increase the continue counter to 255. While there are more than 3 continues left, the "FREE PLAY" text will be displayed on the title screen. This means you can select any stage to play with press Select at the title screen. Also, at the title screen, press Up + Start to trigger a sound test. Every time you dies, the continue is decreased. After the first game over, a sound test is disabled. When the counter is dropped to 3, the game will return to the normal continue mode.
Source: ReyVGM

Juuryoku Soukou Metal Storm, Metal Storm

(UNI) Gravity switch control (added 04.06.14):
During the game, hold Select then press Start, Start to toggle between two modes of the gravity control switch. In the first mode, you need to press D-Pad in the same direction you want to switch gravity. In the second mode, you need to press D-Pad in the opposite direction.

(BUR) GameGenie:
SNKEPULO+OOKEZLVP (for the US version)-Re-enables intro movie.
YASNUKZA (for the US version)
YAKNNKZA (for the Japanese version)
-Enables a level and powerup select mode.
Source: BMF54123

Juvei Quest

(BUR) GameGenie (added 04.08.13):
PAEGAAAA-Partially re-enables some debug functionality. Press A + Select to frame advance, press B + Select to unknown effect, press B + Start at the world map to force random encounter to appear. There are more options, but since there aren't proper data banks and code, they don't work.

 

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