I grew up with the Nintendo Entertainment System. At the time, games were new and challenging for me, but now I have beaten all of the classics too many times to count. The novelty in playing them normally is long gone. But now I can play a new game: take apart the old 8-bit 6502 code and see how it works! I have created these Game Genie codes this way. Each Game Genie code modifies 1 byte in ROM, however due to paging it can change multiple bytes, each at the same location on different pages. This is dealt with by incorporating a 'compare' or 'key' value into the code, making it an 8-letter code, but still you may have the same original byte at the same location on different pages anyway. So it isn't perfect but usually there it a way to work around it or no noticeable difference when the unintended bytes get changed. Feel free to use these to supplement your own collection of codes. I created these codes using the FCEUX emulator's built-in debugger and Game Genie encoder. I also referred extensively to the 6502 instruction set. Double Dragon
ZAKYNTAP
Reveal the complete mission title cut-scene soundtrack by making the scene last 8× as long
Final Fantasy
ZGXZTZPG
Start game with music track 'Opening Theme'
LGXZTZPG
Start game with music track 'Ending Theme'
GGXZTZPG
Start game with music track 'World'
IGXZTZPG
Start game with music track 'Ship'
TGXZTZPG
Start game with music track 'Airship'
YGXZTZPG
Start game with music track 'Town'
AGXZTZPK
Start game with music track 'Coneria Castle'
PGXZTZPK
Start game with music track 'Gurgu Volcano'
ZGXZTZPK
Start game with music track 'Matoya's Cave'
LGXZTZPK
Start game with music track 'Dungeon'
GGXZTZPK
Start game with music track 'Chaos' Temple'
IGXZTZPK
Start game with music track 'Floating Castle'
TGXZTZPK
Start game with music track 'Future Chaos' Temple'
YGXZTZPK
Start game with music track 'Shop'
AIXZTZPG
Start game with music track 'Battle'
PIXZTZPG
Start game with music track 'Menu Screen'
ZIXZTZPG
Start game with music track 'Death'
LIXZTZPG
Start game with music track 'Victory'
GIXZTZPG
Start game with music track 'Got Special Item'
IIXZTZPG
Start game with music track 'Prelude (Character rearrangement version)'
Game Genie cursor wraps from right side of screen back to left side
Notes
On a real Nintendo, this requires 3 Game Genies stacked.
Codes go into effect only for the next Game Genie.
Cursor will become difficult or impossible to move based on which order you enter the codes.
Though physically possible, inserting 3 Game Genies without a game cartridge attached will not work because a Game Genie does not have its own lockout chip and therefore relies on the lockout chip in an actual cartridge.
Gradius II
AASLKUYL
Invincible to enemies (freezes game if you bump into some multi-link enemies)
AVSPKIEY
Pass through solid objects (freezes game if you bump into a boss)
Kung Fu
ETVGZKSL+ VAVGLGEZ+ XTVGGGGE
Invincible unless time runs out
EYNKIAEI
Knife throwers throw the wrong way
VVVEGSSE
Enemy starts with minimum health
VXUKPYSZ+ VXKKZYSZ
Player has auto-recovering health instead of enemy
Legend of Zelda (If you are using an emulator, some of these codes require resetting the game after entering the code.) (The PRG1 revision of Zelda warns you to hold reset when turning off the Nintendo when you die. PRG0 does not have this warning.)
KTVXXXPZ
Hidden entrances revealed (Does not have issues like code KTVXXZ) [PRG0, PRG1]
LANOTXGA
Locked doors still open when you have no keys [PRG0, PRG1]
AAONVPAL
Bombs explode immediately [PRG0, PRG1]
APONVPAU
Bombs explode in half the time [PRG0, PRG1]
ATONVPAL
Bombs take 2× as long to explode [PRG0, PRG1]
EGONVPAL
Bombs take 4× as long to explode [PRG0, PRG1]
AAOESATA
Fast Text (Does not glitch game from 'Pay me and I'll talk' ladies like code OPPEEA) [PRG0, PRG1]
EIVXKGEP
Maximum of 255 Bombs [PRG0, PRG1 untested]
SZUPVSSE
Don't lose magic shield from the 'Like Like' monster [PRG0, PRG1 untested]
PAUPSIAA
The 'Like Like' monster gives you a magic shield if you don't have one [PRG0, PRG1 untested]
SZVEGGSA
Don't lose sword ability from the white 'Bubble' monster (Does not work on the red 'Bubble' monster) [PRG0, PRG1 untested]
Mouryou Senki Madara
XTVLNSSX+ PAVUOITE
Prevent HP from running out during battle for all players. (Using just the first code by itself works pretty well, but if a character's HP is a multiple of 256, the character could still die.)
SZKOZVVV
No random encounters
Pac-Man (Namco)
ZAVIIGPA+ ZAUIIGPA
Pac-Man moves twice as fast
TUKIYXTX
Pac-Man walks through ghosts instead of dying
AEKIYXTZ
Pac-Man can always eat the ghosts no matter what form they are in
Able to select and play any tile that is not covered at all by another tile
IKEKYAGZ
Game starts immediately with solitaire ending sequence
GAXKPAAA
Game starts immediately with scrolling credits (may not normally be possible to see this)
AEUGTEXY
Speed up copyright screen when game first starts
Super Mario Bros.
PXNLOYIV
Player and enemies wrap around the screen instead of die when falling down holes.
Notes
If player jumps beyond the top of the screen, it also wraps to the bottom, so you can bump your head on the bottom of the screen when jumping for flagpoles
You can become stranded at the end of any level that has bricks across the top of the screen
Game becomes stuck if you run out of time
AASIYNLT
Buzzy Beetle can be defeated via fireball
XZOSYYVZ
Fireballs do not terminate upon defeating an enemy. Side effect: Bowser is defeated with 1 fireball. This code could be called 'stronger fireballs'.
XNNATXKN
Start game as second quest
TXEEVGGS
Based on code PEAEKG: Question blocks containing coins have a small coin symbol
NOOAXGGS
Question blocks containing power-ups have a small crown symbol
PGEEXGIG
Overworld bricks containing starman have a small star symbol
TZEEVGIK
Overworld bricks containing multi-coins have a small coin symbol
NPEAXGIK
Overworld bricks containing power-ups have a small crown symbol
YLEAVGIK
Overworld bricks containing beanstalks have a small beanstalk symbol
Super Mario Bros. 3
PTKXYZES
Always able to shoot fireballs regardless of suit, except hammer suit still throws hammers
AEVZPZPA+ AAKZPKLI
If player can shoot fireballs, player throws hammers instead
OXVZUKPX
Always have ability to fly regardless of suit
AXOXELSZ+ VXOXOUSV+ NXOXXUZE+ OXOXUUZE+ AXOXKUZE
Always have Tanooki statue ability regardless of suit
Notes
Glitched statue graphics
Last 2 codes are optional, there may be a bug without them but I have not found it
Player can jump a little bit while in statue state
NNVZPLEK
Tanooki statue state lasts 33% longer
SXNZSNVK
Tanooki statue state never times out
NYKSUZIE
Keep Kuribo's boot after damage
AEVGTLZA
Hammer suit can slide down hills
AEVGGLZA
Frog suit can slide down hills
PEOXNAZA
Mushroom makes you small
LEOXNAZA
Mushroom gives you fire suit
GEOXNAZA
Mushroom gives you raccoon suit
IEOXNAZA
Mushroom gives you frog suit
TEOXNAZA
Mushroom gives you Tanooki suit
YEOXNAZA
Mushroom gives you hammer suit
EEOXNAZA
Mushroom gives you Kuribo's boot (glitched boot graphics)
PAKXVGGA
Leaf makes you small
ZAKXVGGA
Leaf makes you big
LAKXVGGA
Leaf gives you fire suit
IAKXVGGA
Leaf gives you frog suit
TAKXVGGA
Leaf gives you Tanooki suit
YAKXVGGA
Leaf gives you hammer suit
EAKXVGGA
Leaf gives you Kuribo's boot (glitched boot graphics)
PAEXNZLA
Flower makes you small
ZAEXNZLA
Flower makes you big
GAEXNZLA
Flower gives you raccoon suit
IAEXNZLA
Flower gives you frog suit
TAEXNZLA
Flower gives you Tanooki suit
YAEXNZLA
Flower gives you hammer suit
EAEXNZLA
Flower gives you Kuribo's boot (glitched boot graphics)
IXVGNVVK
Starman invincibility does not wear off until the stage ends
KZVZLNVK
White Block 'behind the scenes' effect does not wear off until the stage ends
EAOZUALI+ IYOZKAIE+ _AOZOAE_
Starman changes Mario's first inventory item instead of giving you invincibility
Starman changes Luigi's first inventory item instead of giving you invincibility
UZOZVAEU+ ELOZNEEX
Starman squishes into a shell and can be picked up like a turtle. If it comes out of its shell while you're holding it, it disappears and gives you frog suit. If you kick it, it bounces and can hurt you like a turtle shell.
AZOZEEOZ+ EPOZOAET+ NLOZXESE
Starman causes instant saving of the princess.
AZOZSEGG+ XAOZVAEU+ NLOZNEEX
Starman causes instant saving of the princess only if you are holding 'up' when you get it, otherwise it gives you invincibility and hammer suit.
AEVAXNPP
Beating any level causes instant saving of the princess
EIXKXTEY
Always have cloud ability on map (i.e. skip stages), unless you use an actual cloud item
Nintendo Entertainment System (NES) – Game Genie Code Index. Action Replay Codes Game Genie Codes. The following is a list of games we have Game Genie Codes for games on Nintendo Entertainment System (NES). The Game Genie a cartridge-based cheat system originally designed by Codemasters and sold by Galoob. It temporarily patches the program code of other games, allowing the player to cheat, manipulate various aspects of games and sometimes access unused assets and functions. Jan 09, 2001 Game Genie Codes by THedstrom Updated: Original NES Game Genie codes created by: Tony Hedstrom thedstrom@yahoo.com These codes are copyright 2001 Tony Hedstrom Super Mario Bros, SMB/Duck Hunt Game Genie codes Note: Most of these codes will work on either the SMB version, or the SMB/Duck Hunt version.
1. D4BE-4DA4 Start with computer, firearms skills at level 2 2. D7BE-4DA4 Start with computer, firearms skills at level 3 3. D0BE-4DA4 Start with computer, firearms skills at level 4 4. D9BE-4DA4 Start with computer, firearms skills at level 5 5. D1BE-4DA4 Start with computer, firearms skills at level 6 6. 6DAE-4FA7 + FFAE-44D7 Everything is free 7. CEEF-4DDD Don't subtract karma for spells/skills (must have enough to advance) 8. CE6D-47A4 Don't subtract karma for shooting people--ignore message saying you lost karma 9. 8E69-3DA4 Don't subtract spell points (works for all spell casters). note: casting spells you aren't allowed to raises your spell points. 10. D4BC-4404 Start with 2 strength and charisma 11. D0BC-4404 Start with 4 strength and charisma 12. D9BC-4404 Start with 5 strength and charisma 13. D1BC-4404 Start with 6 strength and charisma CAUTION: NEVER GO OVER 250 STAMINA! THE GAME WILL FREEZE 14. 74B8-4DA4 Start with 50 stamina 15. 10B8-4DA4 Start with 100 stamina 16. F0E1-1FDD Going up 1 body point adds 20 stamina instead of 10 17. F3E1-1FDD Going up 1 body point adds 30 stamina instead of 10 CODES 18 THRU 48 ARE ONE-TIME-USE CODES THAT MODIFY ONLY A SAVED GAME. ENTER A 5-PART CODE, LOAD YOUR SAVED GAME, THEN RE-SAVE. THE CODE DOESN'T NEED TO BE USED ANYMORE. REPEAT WITH OTHER 5-PART CODES IF DESIRED 18. DFBC-17AF + DEB8-1D0F + 7AB8-1D6F + 6EB8-1DDF + 53B8-1DAF Add 65,000 nuyen(tm) (if less than 65,000) 19. D4BC-17AF + DEB8-1D0F + 7AB8-1D6F + 6EB8-1DDF + 53B8-1DAF Add about 131,000 nuyen (if less than 65,000)
Nintendo Game Genie Cheats
20. D6BC-17AF + DEB8-1D0F + 7AB8-1D6F + 6EB8-1DDF + 53B8-1DAF Add about 524,000 nuyen (if less than 65,000) 21. 10BC-17AF + DDB8-1D0F + 7AB8-1D6F + 6EB8-1DDF + 53B8-1DAF Set stamina to 100 22. A6BC-17AF + DDB8-1D0F + 7AB8-1D6F + 6EB8-1DDF + 53B8-1DAF Set stamina to 200 23. DCBC-17AF + EAB8-1D0F + 78B8-1D6F + 6EB8-1DDF + 53B8-1DAF Set magic total possible to 10 (and spell points to 100) 24. F0BC-17AF + EAB8-1D0F + 78B8-1D6F + 6EB8-1DDF + 53B8-1DAF Set total possible magic to 20 (and spell points to 200) 25. FBBC-17AF + EAB8-1D0F + 78B8-1D6F + 6EB8-1DDF + 53B8-1DAF Set total possible magic to 25 (and spell points to 250) 26. D1BC-17AF + E2B8-1D0F + 78B8-1D6F + 6EB8-1DDF + 53B8-1DAF Set strength to 6 27. D1BC-17AF + EEB8-1D0F + 78B8-1D6F + 6EB8-1DDF + 53B8-1DAF Set charisma to 6 28. 9DBC-17AF + FFB8-1D0F + 7AB8-1D6F + 6EB8-1DDF + 53B8-1DAF Set karma to 10 (if karma is less than 32) 29. CDBC-17AF + FFB8-1D0F + 7AB8-1D6F + 6EB8-1DDF + 53B8-1DAF Set karma to 20 (if karma is less than 32) 30. EEBC-17AF + FFB8-1D0F + 7AB8-1D6F + 6EB8-1DDF + 53B8-1DAF Set karma to 31 (if karma is less than 32) 31. DFBC-17AF + F4B8-1D0F + 7AB8-1D6F + 6EB8-1DDF + 53B8-1DAF Add 32 karma (if karma is less than 32) 32. D4BC-17AF + F4B8-1D0F + 7AB8-1D6F + 6EB8-1DDF + 53B8-1DAF Add 64 karma (if karma is less than 32) 33. D7BC-17AF + F4B8-1D0F + 7AB8-1D6F + 6EB8-1DDF + 53B8-1DAF Add 96 karma (if karma is less than 32) 34. D1BC-17AF + F4B8-1D0F + 7AB8-1D6F + 6EB8-1DDF + 53B8-1DAF Add 192 karma (if karma is less than 32) FOR CODES 35 THRU 40, YOUR MAGIC LEVEL MUST BE AT LEAST 1 TO USE SPELLS 35. D1BC-17AF + D5B8-1D0F + 7AB8-1D6F + 6EB8-1DDF + 53B8-1DAF Learn powerball spell, level 6 36. D1BC-17AF + D6B8-1D0F + 7AB8-1D6F + 6EB8-1DDF + 53B8-1DAF Learn heal spell, level 6 37. D1BC-17AF + DBB8-1D0F + 7AB8-1D6F + 6EB8-1DDF + 53B8-1DAF Learn invisibility spell, level 6 38. D1BC-17AF + DCB8-1D0F + 7AB8-1D6F + 6EB8-1DDF + 53B8-1DAF Learn armor spell, level 6 39. D1BC-17AF + D8B8-1D0F + 7AB8-1D6F + 6EB8-1DDF + 53B8-1DAF Learn summon spirit spell, level 6 40. D1BC-17AF + DAB8-1D0F + 7AB8-1D6F + 6EB8-1DDF + 53B8-1DAF Learn freeze spell, level 6 41. D9BC-17AF + DFB8-1D0F + 7AB8-1D6F + 6EB8-1DDF + 53B8-1DAF Learn firearms skill, level 5 42. DCBC-17AF + DFB8-1D0F + 7AB8-1D6F + 6EB8-1DDF + 53B8-1DAF Learn firearms skill, level 10 43. DEBC-17AF + DFB8-1D0F + 7AB8-1D6F + 6EB8-1DDF + 53B8-1DAF Learn firearms skill, level 15