Super Mario Bros - Enemy Modification Game Genie Codes (World)
This page contains the Game Genie codes I have for Super Mario Bros (World), a game for the original NES (Nintendo Entertainment System). If you're playing with an emulator you'll typically be able to put these codes into the program directly through a built in option. Any of you who are old school and playing on a physical console, you'll have to purchase a physical Game Genie cheat device to use these codes.
If you don't see the code you want on this page, I recommend you return to my Super Mario Bros Guides Index and choose a different section.
All Enemies Throw Hammers: AXATAA
Bowser does not shoot fireballs: EYSSPOOZ
There will be random fireballs on the screen before the Bowser fight.
Buzzy Beetles are no longer FIREPROOF, BUT ALL OTHER enemies are!: EISITYEY
Double Power-Ups!: PPPIOE
Enemies & Mushrooms Move Very Quickly (yet another hard mode): ZPNKEZAE
Enemies Are Bullet Bill: ENKTEAEI
Enemies Are Glitchy Looking Bowsers: ESNTSAEY
Enemies Are Headless Bowser: EYNOLAEI
Enemies Are Upside Down: ENVVOAEI
Enemies Are Upside Down (Alt): EIVTNZEY
Enemies Don't Fall From Walking Or Running Off Platforms, Pipes Or Blocks: GXNVPEOU
Enemies Fall Thru The Floor: ENEKEZEI
Enemies Look Like Spring Boards: ENSTNAEI
Enemies run right fast: PIOGYUGA
enemies that are flattened stay on screen and slide: UTNKNZSU
They won't hurt you once flattened
Enemies That Are Up On Blocks Don't Fall Down (and Other Oddities): TEYVPA
Enemies turbo runs right: IYOGYUGA
Enemies walk right super slowly: GTOGYUGE
Enemies Walk Thru Objects And Walk On Air: ENKISYEI
Firebar Spin Speed is Very Fast: NYTGTK
Goomas Don't Walk Off Edges: LETTTE
Hammer Bros never Jump (left side): AEVGKOIZ
Hammer Bros never Jump (right side): AAOVLOAA
Kick Koopa Instantly & Goombas do not hurt: AEKSKEGZ
You don't need to jump on the Koopa
Kicked Shells Move Slowly: LAEIVZPA
Kicked Shells Move Very Quickly: XPEIVZPE
Lakitu does not throw spinies: AVVGTLSZ
Less Enemies: ENOGAPEI
More Enemies: GGGGTY
Most Enemies Are Frozen!: AALLEY
No Enemies: EYKKLPEI
No Enemies: AXIGAO
No Enemies (Alt): ESVGLPEY
Red Koopas Don't Fall From Walking Or Running Off Platforms, Pipes Or Blocks: EKVTZASL
All Enemies Are Bloopers (squid)
Can stomp these enemies out of the water. Piranha plants, fire bars and Bowser aren't affected.
OXNGPPOU
YENGZOOT
All Enemies Are Fire Bars (CCW)
Piranha plants, fire bars and Bowser aren't affected.
OXNGPPOU
TONGZOOV
All Enemies Are Jumping Fish!
Piranha plants, fire bars and Bowser aren't affected.
OXNGPPOU
GONGZOOT
All Enemies Are Randomly-Spawning Bullet Bills
Piranha plants, fire bars and Bowser aren't affected.
OXNGPPOU
YONGZOOT
All Enemies Are... (insert enemy here)
OXNGPPOU
??NGZOO
All Enemies Behave Like Hammer Bros.
OZEGSPSU
IAEGVPTP
Change Enemies when collecting coins
When you collect a Coin you'll change the enemy layout. Beware of fake elevators
OTEUSKTS
AAEUVGYA
Enemies walk right by default
PAVGALZA
YAEKGUEY
Hammer Bros keep jumping
ESVGSPVI
LXVGVOGU
Hammer Bros never jump
AEVGKOIZ
AAOVLOAA
No hammers (bros & Bowser)
ENNGUOKZ
IONGKOKG
Turn All Enemies Into Goomba "Army"
Each enemy loads in as 3 Goombas, use with Jump code.
OXNGPPOU
AUNGZOOV
Turn All Enemies Into Hammer Bros
Use with jump code since it gets rid of elevators
OXNGPPOU
IENGZOOT
Turn All Enemies Into Piranha Plant
Use with jump code since it gets rid of elevators
OXNGPPOU
IENGZOOV
Load Random Enemies
The enemies that are loaded depend on the current musical note
SXNGPPOL
NNNGZOOT
LUNGGOYL
Replace All Enemies During Hardmode (with Bloobers)
LONKTPTA
ENNKYPEI
GUNGTPYU
YAEGYZZA
Replace All Enemies During Hardmode (with Hammer Bros.)
LONKTPTA
ENNKYPEI
GUNGTPYU
IAEGYZZA
Replace All Enemies After Hardmode (with Red Koopa Troopa)
LONKTPTA
ENNKYPEI
GUNGTPYU
LAEGYZZA
Replace Enemy Sprites (coin counter determines sprite)
AEUTSEAA
SXUVXASE
TSUVUALE
YEUVKEOZ
XVUVSAIO
Kicked Shells Move Slowly (fixed)
XKSSVAIE
XNSSNEXI
EXKNZXNY
LEKNLXNY
GKKNGXNN
YEKNIXNY
XSKNTXNN