Super Mario Bros.

Game Genie Codes for game Super Mario Bros.

Game Genie Codes by ABlake (gamefaqs.gamespot.com)

Universal Graphics Codes (affect every aspect of the graphics)

IKAAAE-Just try this sucker out! I can't describe it!
EOXOPE-Super Mario Brothers 2020-the scenery looks tropical (check out them
pipes) and the Castles look like log cabins--freezes if you hit a brick--the
levels underground look normal
OEKULT-Get a fire flower and you can phase between normal graphics and 2020--
has other effects-you can hit bricks
OEPULT-Fireballs invisible, 2020 pops up, music changes, odd effects.
POIAIE-Weird blackness.
POOAZE-Like POOAIE, but play in grayscale.
EOOEIE-Dim colors.
POOEIE-Play in grayscale.
OOOEIE-Play in bluescale.
POOPAE-Mario 1411 graphics. A variation on Mario 2020.
AOOPIS-Similar to POOPAE.
IIIEEP-Blue void.
GKAEEP-Blue void.
GKEAAE-Similar to IKAAAE.
ZKSAAE-Scrambled graphics with jerky scrolling.
EKGAAE-Great frozen title screen!
KKGAAE-Play in the great void with slow music.
OOOOZE-Like IKAAAE.
POOPIE-Mario 1411.
OTAOTA-Like POOPIE.
EOXOPE-2020 graphics. Freezes if you hit a block.

Specific Graphics Codes (affect some of the graphics)

POLAKE-New colors for blocks, etc
TOSENA-Makes a nice background!
OSTENA-blocks and background scenery are fragmented

Note: OSTENA is part of an immense family of codes which switch the sprites
of game elements (pipes, ground, background, etc) I got tired of doing all
of the iterations, but a partial list follows:

AOSENA EVSENA ENSENA KOSENA OOSENA OESENA OXSENA OUSENA OKSENA
OSSENA AESENA OVSENA ONSENA SOSENA ZOSENA ZXSENA ZKSENA ZSSENA
AKSENA ZVSENA ZNSENA VOSENA XOSENA XOGEOA XESENA XVSENA XXSENA
ASSENA XNSENA XUSENA XKSENA XSSENA NESENA NXSENA NUSENA NKSENA
AVSENA NOSENA NSSENA NVSENA NNSENA EXSENA EXSESA TXSENA EXYEUA
ANSENA EXSEUA EXSEVA TKYEUA TKYEVA TKYEOA TKSENA TKSEVA YOSENA
LOSENA TSYEUA TSSEVA TSSENA TSYEVA TOSEOA AOSEOA EOSEOA POSEOA
TOSENA LOSEOA YOSEOA TVSENA TNSENA TOGENA TOYENA TONENA TOSEUA
EOSENA TOSESA TOSEVA TXYENA TXSEVA TXSESA TXYEUA OXSENA OXYEUA
EESENA OXYEVA OXSESA OXSEVA ZXYEVA XXYEUA XXYEOA XXSENA XXSEVA
EXSENA XXSEOA NXYEUA NXYEVA NXSENA NXSEUA NXSESA NXSEVA AKYEVA
EVSENA AKSENA AKSEVA EKYEUA EKYEUA EKYEVA EKYEOA EKSENA EKSEVA
EKSENA OKYEUA OKSENA OKSEVA ZKSENA ZKSEVA XKYEUA XKYEOA XKSENA
ESSENA XKSEVA NKYEUA NKSENA NKSEVA ASYEUA ASYESA ASYEVA ASYEOA
ASSESA ASSEVA ESYEUA ESYESA UXYEUA ESYEOA ESSENA ESSEVA ESSEOA
PSSENA PXYEUA PXYEVA PXSEVA LXYEUA LXYEVA LXYEOA LXYEUA LXSEVA

SKIENA-nice graphical substitutions (background, etc.)
ISNAKZ-when you hit a block, another block is under it
POKEXX-same as ISNAKZ
ISEPAG-ground is a double layer of bricks
EATLGZ-Mario does not become big when powered up....get a fire flower and
become little fiery Mario
SSPPYK-most of the ground is missing
SEIING-hit a block and it becomes nighttime
PGAETT-silhouette Mario
PEKEPS-silhouette everything but Mario
TIKAGI-score is strange
AEENIE-gliding Mario
APPNIE-charging Mario
YAZPNO-weird pipes
YAZONO-pipes replaced by background elements
YAZENZ-gold bricks flash different colors
YAZENG-7s appear where hidden items are
OPKOPK-misplaced background scenery
OLAOLA-play on nothing above actual scenery-neat
STAEXZ+GAAGGA-rains coins--has other effects
EGXNAY-2020 graphics! Also a music code.
STOXUN-Yellow sky.
EPOXUN-Tremors. Also a behavioral code.
IKAXUN-Stripes are missing from background. Scene shifts rapidly.
SSSXUN-Scene changes randomly.
KKKXUN-Scene changes randomly.
TTTXUN-2020 title screen. Freezes.
YYYXUN-Small section of 1-1 with a big hole in it loops infinitely.
EEEXUN-Stripes missing from background.
PPPEPP-Question blocks flash faster.
GGAEXP-Adds colored stripes to screen.
ATPOPT-Switches game elements. Lots of question blocks.
ATEOAT-Almost no blocks.
ATEOPG-Staggered scenery.
POGPIE-When you kill an enemy or hit a block, an afterimage of it stays with
Mario for the rest of the level.
POXPIE-Bizarre graphic scrambler. Freezes.
ATEOPA-Mario starts under the ground.
POOAIE-Neat-looking title screen, screen before 1-1.
POOPIT-Transposing error.
EOOPIT, XOOPIT-Similar to POOPIT-Transposes sprites with one another.
YOOPIT-Great transposing error.
POOAAE-Frozen nice title screen.
NAGOAG-Scenery different or gone.
AKIAAE-Nice frozen title screen.
KIAAEE-Odd menu screen.
PZOOPK-Background full of odd clouds.
ZIGPAK-Background is odd.
ZIGPOK-Misplaced enemies.
ZIGPZK-Too many clouds.
ZGIOOK-Black void.
ZIGPXK-Misplaced enemies.
KITENO-Changing colored stripes on ground.
KISENO-Some ground is invisible.
KKEENO-Discolored level, some invisible scenery.
XLEENO-Stripes.
XLVENO-Some discoloration.
NOPEND-Ground glows. Some discoloration.
XYXPYP-Fragmented 2-headed Mario.
ONEENO-Some discoloration and scene jumping.
SUXENO-Blue and lime green coloring.
SEGEKE-Scrambler.
PAGPEG-Misplaced enemies.
PITEXP-Color-changing blocks.
POPOIK-Floor is raised 1 block.
NOPEIS-White skies.
GGAEXP-Stripes.
ENOENO-Colored bricks.
YAZENO-Green world.
EAZEAZ-Enemies leave trails, gaps in scenery.
YAZEEO-Small changes in color.
YAZEUO-Scrambled colors.
AAAETT-Nighttime 1-1 and scrambled graphics.
PINAOO-Scrambled colors.
PEKING-Nice freeze.
AEKING-Nice freeze.
EPIOZE-Nice title screen.
EXPOPE-Grey title freeze.
EOPOPE-Adds lots of question blocks to level.
PGOOIG-Scrambles graphics.
IGOOIG-Scrambles graphics.
OPOOIG-Scrambles graphics.
AAAOIG-Scrambles graphics.
AEPOIG-Scrambles grapihcs.
KPKPKP-Ground covered in 1/2 pipes.
OZONAY-Fragmented graphics.
ZOTAKK, YOTAEG-Changes color of enemies, items.
IUTAVG, AEIAOG, IOTAKK-Blocks and mushrooms are monochrome.
ZXTAVG, ZXTAKG, ZXIASG-Some mushrooms, fireballs, and spinys are almost
invisible.
LOIAOK, LXIAEK, LEIAXK-Blocks are sea-green.
ZXIAOG, ZXIAEG, LXIAXG-Blocks are blue with purple lines.
LOIAOG, GOIAEG, ZOIAXG-Blocks are bright purple.
YOIAKG, YXIAVG, AXIASK-Clouds are red and orange.
IXYASG, IXIAOG-Blocks are pink.
ZOTAVG, POTAKG-Blocks are blue and white.
PEAEKG-Blocks which contains coins are marked with the number 1.
IXTASP-Blocks flash fast.
IZSPOP-Background is scrambled.
KIPAXI-In castle levels x-4, the bricks and lava are blue, there is text at the
top of the screen, and there are other graphical effects.
INSAKE-Graphics substitutions.
GGOPAK-Scrambled background.
GKIAEP-Screen flashing.
GYAEVO-Spots of color.
ZEKAEP-Screen jerky and graphical errors.
SIKAEP-Graphics are scrambled. Also a behavioral code.
AIPEAT-Black sky.
TLLLAT-Fireballs disappear and reappear.
APZPIG-Scenery is scrambled.
APZPYG-Neat scrambled background.
KSKXVV-Scrambled colors.
ZGGAEP-Strange background, slowdown.
IIAAZT-Always look like Fire Mario.
EKGAIS-Odd palette.
*KGEKG-Color of bushes and pipes different.

Behavioral Codes (affect jumping, running, blocks, etc.)

PIAULT-Mario slides when you try to stop or turn around
POPISO-enemies cannot be stomped
POEISO-goombas change to invincible Koopas when stomped
GPPXXY-blocks disappear when you hit them
IOAULT-fireballs behave...oddly
TELLEY-helium-filled Mario has a hard time staying on the ground
IOEOIO-Mario is permanently invincible, but music is normal
IVYIVY-very fast Goombas
SUEISA-run into enemies to power up
SEPUEG-hit first mushroom block and your score starts climbing fast
PEGLEG-jumpy mushrooms
EATLEG-mushrooms and fireflowers absent, 1up mushrooms jumpy
GAPOAO-come out of pipes wrong-cool code
XVSUOS-all 1ups replaced with starmen
OKKULT-fireballs ignore laws of gravity and physics
EEEULT-fire shooting behavior odd-can produce machine-gun effect
UNNUUN-Mario has difficulty jumping
NAXULT-hold jump to hop once you get Fire Flower
POIISK-can't hit bricks
POIISG-items in ? blocks are random
VENPIS-all blocks are items
VALLEY-enemies either move fast or don't move at all
TALLEY-enemies move left only
POIISO-stomp an enemy and he flips over and floats downstream
PONISO-stomp an enemy and get hurt
YLLLLI-mobile powerups will fall off-screen rather quickly
ULLLLI-Mario is slow
PSKIST-Mario cannot move
AYYNIE-Mario cannot move
AYYYYP-Mario cannot move-stupid
POIIOG-Mario can pass through boxes
PIGOAP-swim without water--neat code
TIKAPO-slow motion
YXZLNY-Mario is fast
EATSSY-walk through things
YAZSNO-get hit by enemy and power up
ELVISS-zombie Mario-pulled to right side of screen
YPZTZZ-invisibly tall Goombas
YEZTZZ-cannot be touched by enemies or powerups
YAZYIZ-lots of teleportation--fun code
YZZENO-lots of enemies throw hammers at you
EVYIVY-things on ground bounce
YZXLNY-run really fast
SSASSA-invincible
PAASNO-Mario can stomp all enemies
PAZSNO-Mario can always throw fireballs
ZEVLGK-very high jumps
EEVLGK-rocket jump from standing start
ZEVLEY-jump a little higher
EVYIVN-enemies walk through walls
YZXLNN-no enemies and you have super speed
NZXLNY-can go left until you stop
KGXVYU-Enemy position different than perceived position.
EGXVYU, EPXVYU, AGXVYU, EPIVYU-Enemy position different than appearance.
EEEVYU-Enemies, powerups fall through ground.
EPOXUN-Blocks turn invisible when hit. Also a graphics code.
POPXUN-Random invisible blocks and vines appear.
NNNVYU-Mario passes through objects and touches invisible ones.
ZXLLUN-Mario jumps high, comes up from under screen, hits ground, and floats
down slowly. Enemies and powerups also float down. Freezes if you get too
close to the left edge of the screen.
PUNLUN-Similar to ZXLLUN.
UXLLUN-Mario cannot jump.
UUUXUN-Scroll does not keep up with Mario.
ZALLUN, ZILLUN, ZPLLUN, ZZLLUN, ZGLLUN, ZTLLUN, ZYLLUN-Mario and enemies have
trouble running and stopping properly.
GENLAS-Mario has extra acceleration.
GENUAS-Mario has super-speed.
GENPTS-All question blocks contain powerups.
GENPAZ-Mario, enemies fall through ground.
POEISA-Mario is invincible and starts with 1000 points.
NAGLAG-Certain blocks repel Mario.
NAGNAP-Coins move when you get them.
NAZNAG-When you hit a block, all enemies move closer to you.
PINAAO-Move around while game is paused!
STAGEO-All enemies throw hammers!
SPEPNY-Fire is shooting at you like in a dungeon.
SGTOSK-Drop into levels. Die at 1-2 from time-up.
GGIOOK-Mario is a zombie. Also a new world code.
KGIOOK-Mario is a zombie. Also a new world code.
EGIOOK-Mario is a zombie. Also a new world code.
GANOPE-Enemies turn into headless bowsers.
STOPYP-Come out of pipe in a cool way.
ZONENO-Earthquake!
OPPOAK-Earthquake!
SEPTAT-Coins are in odd places.
TIKOAP-Starts level in odd location.
TSTOIG-Zombie Mario.
NZXNLO-Mario stuck in upper left-hand corner of screen.
KIGLUY-Mario, enemies teleport.
YNPPPO-Invincibility.
TVAPKG-Lowers ground one block.
AETVEN-When Mario shoots fire, strange things happen.
TVTAGG-Everytime you get a powerup or stomp an enemy you get a 1up.
OTGOTO-Swim without water.
SKIINO-Enemies do not die.
EKPLLL-Moon gravity. Also a music code.
ZIGGYY-More enemies.
NAPKIN-More koopas.
SIKAEP-Mario can jump high. Also a graphics code.
KAAEPO-Enemies do not die.
PKAOZP-Mario is invincible and flashing.
LUGLUG-Items like mushrooms and starts move slowly.
SZLIVO-Once Mario gets a mushroom, he is invincible until time up or a pit,
at which time Mario becomes small. If he dies again, he changes to big.
AAZUAG-When Mario is turbo running, he can jump as high as desired by holding
the A button.
TALLAT-Mario has autofire when he gets a fire flower.
TPLLAT-Mario glides along the ground when he has a fire flower.
TGLLAT-Mario emits bubbles when he has a fire flower and fireballs disappear.
Mario also teleports occaisonally and sometimes the game freezes.
TKLLAT-Fireballs always travel to the right.
TTLLAT-Mario cannot fire except rarely, when fireballs appear as silhouettes
and copies of them move symmetrically with the originals.
AUINAL-Enemies teleport. Also a sound effects code.
EATOZO-Mario drops from sky at beginning of levels.
APZPVG-Enemies are different.
TAZUIG-Slow descent from some jumps and occasional low gravity.
GTTTTL-Go through enemies and flowers.
GIIIVY-Go through pipes and blocks to the right.
AAATIO-Only Mario can move.
KILLEN-Mario, Goombas behave oddly.
XVXOKK-Enemies replaced.
LUILUI-Mushrooms replaced with flashing odd stuff which affects you like a
starman.
ISKVGY-Enemies "melt" when stomped.
PAOEPO-Game moves faster.
GOZSXX-Mario is invincible, even from fire.

New World Codes (create new levels)

 You should use SSASSA (invincibility) and PIGOAP (swim without water)
when using these codes to explore areas which would be otherwise inacessible.

GENPAS-transposes certain game elements (pipes, question blocks, etc.)
GENOAS, GENPZS, GENPLS, GENPGS, GENPIS, GENPOS-All of these do similar things
to game elements, like GENPAS but they all differ from each other.
ATEOPT-transposing error pt. II
POOPIS-Transposing error.
POOPIG, POOPIK-Puzzle piece world. Use PIGOAP or you will fall and die.
TOOPIS, OOOPIS, LOOPIS, POAPIG, POLPIS, POYPIS-All new worlds.
POZPIS-New world. Also a music code.
SIIPKK-Flooded bullet land. 1-2 is a pit.
SPEPNG-Underwater loop.
SPPPOG-Underwater 4-1. 1-2 is underwater 4-3. 1-3 is underwater loop.
PIPOIS-Altered 1-1. Cannot finish level.
SIPPNG-Keep playing through this one. A later level takes place on clouds,
like a bonus round!
PGAPGG-Warped 1-1.
PUPOIS, POPOIS-Altered 1-1.
LIZONK-3-3 to 3-3 to 1-2 to freeze.
XAAOOK-Water world->4-1->1-3 with Lakitu->underwater loop.
NIXOOK-8.3 loop.
PGAOOK-0-1 strange level.
PGAOPK-Question block land which you cannot finish.
NLXOOK-1-3->1-3->1-2->freeze.
EGAOOK-Underwater 4-1->Underwater 4-3 with EARTHQUAKES and cheep-cheep swarms
and then going to the underwater loop.
PZXOOK-1-3 to 1/2 to freeze. Try this out.
IPPPPI-Pipe and steps turn into question blocks. Freezes.
SGKOKK-Repeating 8-1.
TGOPSK-Repeating 2-2.
OGOPOK-Underwater 4-1 to underwater 1-3 to underwater loop to freeze.
PGOPOK-Underwater 4-1.
OGIPOK-Short wacky land.
OAKPOK-Misplaced-enemy land.
PGOPSK-Underwater 4-3 with grey bowser to underwater 8-4 to freeze.
ZIGPSK-1-3 with no platforms to 5-1 no enemies to nocturnal 8-3 to 2-3 bridge
to 8-3 (1-5) as a castle to 5-1 no enemies to underwater 4-1 with no Lakitu
to 1-8 boring level to some strange dungeon to ? Try this code!
AYKPSK-Large ocean to 4-4 as a normal level to clouds.
IAGPSK-4-1 with no Lakitu to 1-3 to underground underwater level to ?
GAIOPK-Stone-filled universe!
PGPOSK-2-1 to 2-3 to 2-3.
SGOOSK-3-1 to 3-1 to 1-1 to 1-3 to ?
SAGOSK-Cloud land to 2020 graphics to freeze.
SGAOSK-Underwater 4-1 to underwater 4-3 with earthquakes to?
OGIOOK-Wacky colored 1-1 with grey zombie Mario. Also a behavioral code.
OGOOKK-Repeating underwater castles.
AGOOPK-Handicapped 1-1.
PGOOKK-Underwater loop.
AGIOPK-World of IF.
EIGPSK-Some dumb level to underground night level to desolate plain level to
underground 4-3 to ? to dungeon 4-3 to time-up death.
VIGPSK-4-4 as a normal daytime level to cloud trap.
OPOPOK-2020 graphics. Underwater 4-3 to cloud loop.
VGKOKK-Nighttime in the mine.
UGKOKK-Nighttime in the tunnel in greyscale.
ZAGPSK-4-1 no Lakitu to 1-3 to fantastic sewer level.
OGOPSK-Dungeon loop.
ZIZPSK-1-1 with Lakitu to 1-2 with Toad! Loops.
KGKOKK-Pipe to pipe to underwater 4-3 to fantastic 2-5.
GGOPSK-Dungeon 1-3 to normal level to blackness.
ZIGOSK-Drained 2-2 to daytime castle.
IAGPSK+PGPOSK-Weird 1-1 to ?
ZIGPKK-Fantastic daytime 2-4.
ZIGPTK-Fantastic tetris levels!
GGIOOK-Halloween land with zombie Mario. Also a behavioral code.
KGIOOK-Fall-colored stone land. Also a behavioral code.
TGIOOK-Fall-colored land.
EGIOOK-Stone land with zombie Mario. Also a behavioral code.
ZIGPYK-Stony land.
PIPOIS+ZIGPSK-Strange plain with artifacts!
SAGOOK-Drained 2-2!
PGAOKK-World of OF.
OAKOAK-Flat plain dead end world.
SAZAKE-Altered 1-1.
ULTPLT-Really strange world.
OOOOAK-World riddled with holes.
PPPOSK-Looping 1-3 and 2-3.
LLLOAK-Strange world.
LLLPSK-Strange castle lands.
UUUOKK-Daytime castle world.
TIKOIO-Flooded outside world.
VPPPPI-Strange world with shooting coins.
PXZOIG-Rock world.
AISOOK-Grey brick, black sky, no scenery.
EISOOK-Black background, no ground, autumn color scheme.
VISOOK, XISOOK-No ground, just pit of water.
UISOOK+ZIGPSK-Great zombie castle.
GISOOK-Cloud world, zombie Mario.
TISOOK-Grey mine land->trap.
YISOOK-Zombie autumn world.
APSOOK-Grey 1-1 with ceiling.
AZSOOK-Grey blocks, ceiling, partially trapped in blocks.
ALSOOK-Fall night-time coloration.
ETSOOK-Fantastic 1-1 that looks like 8-3!
OGSOOK-Zombie grey stone.
ZASOOK-Zombie grey.
GGSOOK-Halloween zombie.
GISOOK-Cloud zombie underwater.
KGSOOK, IASOOK-Autumn stone zombie.
ILSOOK-Cloud zombie.
TGSOOK-Autumn stone with ceiling.
TISOOK-Grey tunnel with ceiling.
TYSOOK-Ceiling.
YASOOK-Zombie cloud castle with ceiling.
NASOOK-Cloud 1-1!
ZZSOOK-Grey, no background.
XPSOOK-No ground, castle, with ceiling.
UZSOOK-Autumn stone.
GASOOK-Autumn water.
APSOOK-No background, autumn.
PGPOOK-Cloud level.
PAAOOK-Fantastic code! Use PIGOAP. Starts out as a 1-1 with a black
background and no ground. Soon you depart from familiar 1-1, swim over a
lake of lava, and enter a strange corridor made of alphabet blocks!
PGEOOK-Like the aforementioned level 0-1.
ZIGPSK+PEZOOK-1-3 looking stony world->autumn plain 5-2?->underground above
ground level at night->8-3ish cheep cheep bridge->8-3 dungeon!->1-6 zombie
freeze.
PZZOOK-1-3 with misplaced enemies->freeze.
LOZOOK-Similar to PZZOOK.
LOZOOK+ZIGPSK-Fantastic mine shaft (use PIGOAP.)
POZOOK+ZIGPSK-Plain (go down 1st pipe for underground above ground level at
night.)
PAZOOK-1-3->1-3->1-2 different enemies->underground above ground.
PZZOOK+ZIGPSK-8-3 misplace enemies->same->underground 8-3->normal 8.3->?
PXZOOK-Short odd 1-1->odd zombie level.
PLZOOK-Same as PXZOOK but no zombie.
PAPOOK-Bonus level.
PKZOOK-Odd 1-1->zombie ?
PKZOOK+ZIGPSK-Odd 1-3->odd autumn level->underground 8-3->cheep cheep bridge
->odd 8-3->dungeon->zombie plain.
PSZOOK-Odd 1-1.
PAGOOK-Drained underwater level.
GISOOK-Zombie cloud.
UAAOOK-Dungeon.
GAAOOK-Great time-up.
OAAOOK, IAAOOK, KAAOOK-Great time-ups.
GAGPSK-4-1->1-3.
XIGPSK-5-2->?->freeze.
VIGPSK-Drained dungeon->cloud level->can't finish.
AIGPSK-Castle time-up.
EIGPSK-Great! Go in pipe for underground above ground->5-2->underground 4-3
->freeze.
OPOPOK-Underground->underwater-underwater 5->underwater 4-3->underwater 4-3.
NIGPSK+PIGOAP-Like PAAOOK but normal graphics.
EATOZS-1-1 becomes just a row of blocks that goes on forever.
GPPPPI-Altered 1-1 with many powerups.

YSAOPE+YEAOZA+

 AOAPYA-World H-1
 POAPYA-World I-1
 ZOAPYA-World J-1
 LOAPYA-World K-1
 GOAPYA-World L-1
 IOAPYA-World M-1
 TOAPYA-World N-1
 YOAPYA-World O-1
 AXAPYA-World X-1
 LXAPYA-World -1
 NEAPYA-You are stuck in the underwater part of 8-4.
 EEAPYE-A flooded world.
 PEAPYE-Swimming through a bonus round at night.
 LEAPYE-A flooded castle.
 KEAPYE-Many different levels.
 SZLIVO-World 0-1 (underwater dungeon with traps)

KIIOZV-Levels are arranged differently.
AIPPAT-Small changes to level. Also a music code.
EIPPAT-Similar to AIPPAT.
AIAPAT-Level is rearranged.
AIZPAT-Many blocks are gone, level is different. Also a music code.
AITPAT-Level contains some object substitutions.
PPZOOG-odd 1-3->odd 1-3->odd 1-2->odd 1-3->odd dungeon->odd 1-3->odd 1-3->odd
underwater loop.
AIZOOG-Blue void with powerups and some scenery.
APZPOG-Scrambled underwater 5-2->3-1->3-1->underwater plain->freeze
APZPUG-strange underwater 4-1->strange underwater 1-3->underwater loop
APZPEG-Underwater loop.
IPEPNY-Fire in 1-1.
NPEPNY-Bullets in 1-1.
KPEPNY-Flying fish in 1-1.
OPEPNY-Lakitu in ground in 1-1.
AAPOTS-Wonderful altered 1-1. Explore this world; levels are insanely long
but can be completed.
PKPOKK-1-1 with clouds for blocks.
PIGPOG-Enemies, lifts switched around.

New World Traps (creates world in which you cannot move)

TIKOKK-Weird castle land.
UIGPSK-Dungeon trap.
TIGPSK-Brick land trap.
PSKOIG-Happy brick land (trapped.)
SGSPSK-Trapped in cloud world.
OAKPSK-Trapped in clouds.
SGSOOK-Stuck in stone world.
AGOOKK-Stuck in nice caste land.
OGAOKK-Pipe-top world.
UGIOOK-Nice stone trap.
YGIOOK-Cloud castle!
AGIOOK-Halloween trap!
UGIOOK-Cloud trap.
LGIOOK-Stone trap.
ZGKOKK-Fantastic cloud trap at night.
XGKOKK-Cloud trap with timeup death.
SGAOKK-Purple cloud trap.
POZOIG-Rock trap.
AISOOK+ZIGPSK-Great trap.
IISOOK-Zombie, trapped in stone.
AGSOOK-Halloween colors, freeze.
ATSOOK-Nice cloud trap.
EASOOK-Nice time-up.
EPSOOK-Grey time-up.
EGSOOK-Zombie, in stone.
PPSOOK-Castle, cloud trap.
GLSOOK-Stone grey trap.
KASOOK-Cloud castle time-up.
KPSOOK-Cloud trap.
SLSOOK-Autumn trap.
YGSOOK-Nice cloud castle trap.
EYSOOK-Infinite music, trap.
LASOOK-Nice cloud trap.
LTSOOK-Castle trap.
YTSOOK-Castle trap.
UGSOOK-Cloud trap.
TIGPSK-Nice trap.
UIGPSK-Castle trap.

Drop Codes-drop you into a pit

OGIPSK-Changing world with time-up death.
ATEOAG-drop into a pit of blue
OAKOSK-Drop from sky into nothing with time-up death.
PGAOSK-Great drop into nothing with time-up death.
SAGOKK-Warp to 6-7-8 warp zone and die.
SGAOOK-Drop into white and die.
PISPYP-Drop.

Warp Codes

SPPPNK-Loop of some level.
OGOPSK-Warp to 8-4.
OAKOKK-Warp to 6-1.
SGOOKK-Warp to 1-4.
TAKOKK-Warp to 3-3.

SFX Codes

NAGNAG-new sound for stomping
NAGNAK-Many SFX different.
NAGYAG-Many SFX different.
NZZNZG-Many SFX different.
NAGNIG-Stomping FX different.
NAGNZG-Hitting block FX different.
NAGNLG-Stomp FX different.
AAGNAG-Stomp FX different. Freezes.
EAGNAG-Block, stomp FX different.
NOGNAG-Go down pipe FX different.
PAGNAG, NGGNAG, NTGNAG-Many FX different.
AXINAL-Jump FX different.
AUINAL-No jump FX. Also a behavioral code.
AVINAL-Jump and fire FX are different.
PVINAL-Jump, fire, and powerup FX are different.

Music Codes

NGGNAY-creates interesting music from all songs (loops several notes and
plays various bass parts over this)
NIGNAY-takes the DrumMix (explained later) and inserts pauses into it
YAGNAY-plays briefly some of the end-game music and then stops-only works
occaisonally
OGGNAY, XGGNAY, UGGNAY, KGGNAY, EGGNAY-All of these are similar to NGGNAY,
but each is different from the rest.
STAPTO-Music stops immediately.
PPPPPP-Various tunes are switched around.
EGXNAY-Drums are off-time. Also a graphics code.
YYYVYU-When you stomp an enemy, music goes through several variations.
KOTAGE-No sound at all.
PIPPPP-Plays invincibility music constantly.
PAPPPP-Loops normal music constantly.
POZPIS-When you interact with blocks, enemies, the music screws up.
NAGNAN-Music skips.
NYGNAG-Music skips.
AGGNAY, ZGGNAY-One instrument plays some wrong notes on a sine wave.
GGGNAY-Same as AGGNAY but with banjo sound.
POTPIE-Freezes with great grinding noise.
EOPOPE-No music. Also a graphics code.
APPPPP, PPPPPP, TPPPPP-Mixed-up music.
EPPPPP, LPPPPP, SPPPPP, NPPPPP-Weird music.
ZPPPPP, GPPPPP, VPPPPP-No music.
XPPPPP, UPPPPP-Underwater music.
KPPPPP-Fortress music.
SKINIT-Between-level music.
UNVUXV-Repeating music.
STOPPP-Starman music.
TGOOIG-Remixes on the fly.
YGOOIG, TAOOIG, TPOOIG, TZOOIG, TLOOIG, TYOOIG-These all do fantastic
remixing which depends on what Mario does!
EPONLY-Fragmented music; some instruments off-time.
PISNLY-Music stops immediately.
NZXNLY-Trance remix.
NLXNLY-Similar remix.
AEENLY, ZEANLY-Sound effect music freakout!
NVXNLY, SEXNLY, XXXNLY, Adds a short-decay instrument (like a terrible synth
banjo sound) playing the melody.
OZXNAY, NZXNAY, EPXNAY, APXNAY-All these make the drums off-time in various
ways.
PPPNLY-Music starts and stops frequently.
EPPNLY, APONAY, TVYNLY, EPONLY-All these make the melody off-time and the
music starts and stops.
PPENLY, NZANLY, NZENLY-All these make the bass strange.
ZLLNLY, NZYNLY, NTXNLY, NYXNLY, NZNNLY, NZXNPY, NZXNZY-All these codes make
really cool remixes of the music with extra drums.
ZOANLY, ZXENLY-The melody is turned off.
NUNNLY, YVYNLY, VNNNLY, UUUNLY-If the Mario/duck hunt cart is in, these will
first make weird slow interpretive ballad music and then go into a warped
duck hunt with the coolest music you've ever heard!!! If the cartridge of
just Mario is in, that ballad music will continue.
NANNLY, PZZNAY-Drums off-time, melody slow/off.
YLYNLY, GINNLY-Music skips frequently.
NSXNLY, NNXNLY, SUXNLY-Adds a pure, no decay sine wave (like a synthesized
clarinet) playing the melody.
NUXNLY, NXXNLY, IOXNLY-Adds another melody sounding more like an oboe.
TZXNLY, NIXNLY, NGXNLY-Every instrument is odd or skipping.
NZXNUY, NZXNOY, NZXNSY-Makes one note more prominent.
EPONAY, EPONEY-Strange fragments of all songs and instruments.
NEXNLY-Soft clarinet melody.
NZONLY, NZPNLY-Strange transitions between sections of music.
NIGNAY-Start/stop minimal music.
PPONAY-Fragments of normal music.
YEANLY-Like ZEANLY.
YVONNE-Makes great noise.
AIPPAT, EIPPAT-Drums occasionally stop. Also a new world code.
AIZPAT-Music starts/stops and drums cut out. Also a new world code.
ATINAL-Music replaced by grinding noise.
ETINAL-Similar to ATINAL.
OTINAL-This and *TINAL replaces the music with different noises.
AEINAL-Music and SFX freak out.
APINAL-Constant grinding.
AGINAL-Different constant grinding.
ASINAL-Wonderful musical freakouts triggered by jumping. Freezes.
ATINZL-Hum and hiss.
TVVOAE-Altered underwater music.
ZZAYGN-Great warped music.

Deleter Codes (eliminates certain game elements)

SEGAKE-no scenery
XZZOEK-no enemies
VULANE-world is invisible (blue screen code)
IKTPOK-no outdoor enemies
ZTSLEG-no items except coins
TIKULT-fireballs disabled
PIGNAX-Mario is invisible, enemies are gone
NAGNAX-Mario is invisible, enemies are gone
VENUSS-no items in bricks
USSUSS-no mushrooms
PZOPIG-Some background is gone.
PIGPEG-No enemies.
NZXNLZ-Mario, enemies invisible.
ELLOOK-No ground.
EAKKPO-No enemies.
SAGOZK-no background
ATLOPT-No platforms.
APPPPI-No blocks.
AAOPAK-No background.
YYOPAK-Only clouds in background.
ZTSLEG-No special items.
AASOOK-No background.
ZGSOOK-No background.
PYSOOK-No background, blue sky.
XLSOOK-No hills.
KOTAGE-No sound at all.
PGOPGO-No music.
XAPSVA-No starman music.

Misc. Codes

ALKELI-Score is strange.
IANOXG-timer is goofed-starts on MOO!
ATAPIX-continues automatically
IGEAPO-game stuck in demo
TIKPOG-more enemies
EPZKIX-tons of turtles
YYTOZA-Over 155 lives.
OKZAPO-Every button pauses.
KILLLU-Jumping when big warps you to the next level. Freezes.

Failed Codes

These are codes I have seen on other lists, tested, and found not to work.
This may be due to differences among cartridges, or to the fact that I may
have simply missed the effect. If anyone can discover an actual effect,
good for them. Thanks.

POZXUN-No description available.
NAPNAG-Description reads "Hit block for permanent 2020 graphics."
APIAAE-No description available.
KIZVUY-Description reads "I'm walking."
GPPXXY-Description reads "Flying Mario."
PAITEN-Description reads "Mirror Mario."
AYYYYP-Description reads "Things flying."
KILLXV-Description reads "All blocks contain coins."
KENVAS-Description reads in part "Super, super, super fast."
GPPIGE-Description reads "Crazy Goombas."
STLNYL-Description reads "Crazy space jazz."

Super Mario Bros. 2

Super Mario Bros. 3