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Super Mario World (NES)

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Title Screen

Super Mario World

Developer: Hummer Team
Publisher: JY Company
Platform: Unlicensed NES
Released internationally: 1995

CopyrightIcon.png This game has hidden developer credits.
GraphicsIcon.png This game has unused graphics.
MusicIcon.png This game has unused music.
Carts.png This game has revisional differences.

ProtoIcon.png This game has a prototype article
BugsIcon.png This game has a bugs page
DCIcon.png This game has a Data Crystal page

The Famicom Super Mario World is probably the most accurate unlicensed port of the 16-bit original out there. It's certainly not perfect (several bugs, poorly redone music, lousy controls in relation to running and jumping physics), has just 28 levels of the original's 78 (with the Switch Palaces and secret worlds being completely absent), and is missing a number of enemies, obstacles, and other elements (some of which is due to the differences in hardware such as the Famicom's lack of Mode 7), but it's generally pretty good at sticking to the source material.

It's also notable for having a fully-functional Yoshi, something Nintendo said was impossible to do on Famicom hardware. Oops.

To do:
Several things:
  • This page lists some bit variables: Mario's current state (Small, Super, etc.), his current state with Yoshi (no Yoshi, on Yoshi, Yoshi with P-Switch, etc.), swimming, invincibility, and number of stages unlocked. Could be good for a Notes page.
  • More unused graphics (see talk page, requires verification).
  • There's an unused variant of the "THANK YOU" screen with just Yoshi's house and no text.
  • There's a bug where the Butter Bridge 2 stage always begins at the midpoint.
  • Unused world map content.
  • Source code left over in the CHR ROM.


Read about prototype versions of this game that have been released or dumped.
Prototype Info
Read about notable bugs and errors in this game.

Unused Enemies and Objects

All the enemies in the section below can be found in this video. They can be spawned in with cheat code 0500:??, where "??" is one of the IDs below.


SMWNES Spiny.png

ID: 0x9A
Could have appeared in Forest of Illusion 4 (Chocolate Island 1 in this port).

Diggin' Chuck

SMWNES DiggingCharginChuck.png

ID: 0xD4
A miscolored Diggin' Chuck. The original game had them in just one level, Valley of Bowser 4, which is not present in this port.

Bouncing Rock

SMWNES Rock.png

ID: 0xB4
Similarly miscolored rocks that Diggin' Chucks throw at the player.

Bullet Bill

SMWNES BulletBill.png

ID: 0x80
None of the areas they were found in the original game are present in this port, so they go unused.


SMWNES Fishbone.png

ID: 0x8A
Similar to the Diggin' Chuck, the areas where Fishbone was encountered in the original are not in this port.

Unused Graphics


Unused Big Mario Sprites

SMWNES UnusedMarioSprites.png

Super Mario and Fire Mario have several sprites that go unused. They even have Luigi variants. Some things of note:

  • While Mario can throw fireballs in this version, the second unused sprite uses tiles from Super Mario's graphic banks, hence why this is unused.
  • The last sprite seems to depict a different head for Mario, but it's found with the Fire Mario sprites and no other tiles exist for this variation.
  • Mario can kick shells, but it has no animation in-game.
  • A possible reason why the sliding and kicking sprites are unused is due to a lack of similar sprites for Small Mario.

Unused Small Mario Tiles

SMWNES UnusedSmallMarioTiles.png

Miscellaneous tiles for Small Mario. These were likely meant for an earlier design with a different palette.

Continue Sprite

SMWNES HaloMario.png

Mario with a halo, used in the original game's continue screen. This port has no option to continue after getting a Game Over.

Unused Enemy Graphics


SMWNES Muncher.png

Animated graphics for Muncher. The ones that appear in-game only have one frame and act as a background hazard, whereas these look like they could be used as sprites.


SMWNES LakituSpiny.png

Could have appeared in Forest of Illusion 4 (Chocolate Island 1 in this port). No graphics exist for a cloud that Mario could ride in.

Beach Koopa


A single tile that appears to be part of a sprite of a Beach Koopa kicking a shell.

Diagonal Spike Top

SMWNES SpikeTopDiagonal.png

A diagonal sprite for Spike Top, intended for when they move over corners.

Horizontal Podoboo

SMWNES PodobooHorziontal.png

Although horizontal Podoboos are used in-game, they use a different style and are not animated.

Vertical Bullet Bill

SMWNES VerticalBulletBill.png

A sprite for a vertical Bullet Bill.

Clappin' Chuck

SMWNES ClappingCharginChuck.png

A sprite for a Clappin' Chuck.

Pitchin' Chuck


An alternate arm for Pitchin' Chuck's throwing animation. It doesn't match either of the throwing animations from the SNES version, unlike the used throwing frames.

Flattened Enemies

SMWNES FlattenedEnemies.png

Flattened sprites exist for Koopas and Rexes, but aren't seen in-game. This is especially odd given that Dino-Torches do use their flattened sprite.

Dry Bones


An unused portion of Dry Bones' head. It is almost identical to a tile used for its walking frame, however the neck bone is positioned one pixel lower than in the used version.


An unused body sprite for Dry Bones. It is identical to the body for its used standing frame, except it is missing its neck, and the entire sprite is shifted over 5 pixels to the left. Due to this offset, it does not fit with any of its other graphics any more.



Sprites of Morton and Roy turning to start walking up a wall, mimicking one of the original game's Mode 7 effects.


A third animation frame for Morton's and Roy's walking animation. It doesn't seem to fit very well, and might be unfinished, as the frame appears to lack feet.


An unused tile of Lemmy Koopa's hair that no longer fits with any of his sprites. Likely left over from when his sprites may have been arranged differently.



What appears to be a very tiny platform stored alongside Reznor's graphics. Purpose unknown.


Cave Level

SMWNES CaveLevelSpot.png

The graphic used to denote cave levels in the original game. While two cave levels are in this port, they instead use the same world map graphics as normal levels.


SMWNES BooMap.png

A tiny Boo. In the original game, this appeared over Ghost Houses on the overworld map.

Star Road Warp

SMWNES StarRoadWarp.png

A tile for the Star Road warps from the original game. There are no other elements related to Star Road in this port.


Background Wooden Spike

SMWNES BGWoodSpike.pngSMWNES BGWoodSpike2.png

Background variants of the wooden spikes. The used version is a sprite and has a slightly different design.


SMWNES Crusher.png

The giant crusher, meant for castle levels. It has no collision and is replaced by Thwomps in this port.

Animated Flip Block

SMWNES FlipBlock.gif

An animation for the Flip Block, which goes unused as you can't flip blocks (or break them or P-Switch them into coins, for that matter) in this port. There is in fact an unused spinning Flip Block tile that uses this animation, but it simply acts as a normal solid block. Interestingly, this tile does appear in Roy's Castle in the incomplete version! (It's replaced with the used stationary Flip Block in the completed game.)

Yoshi Eggshell Pieces

SMWNES EggPieces.png

Eggshell pieces. Similar graphics were used in the original when Yoshi hatches out of an egg.


SMWNES Princess.png

Peach reaching the ground and opening her eyes after falling out of the Koopa Clown Car, which is not used here.

SMWNES PeachParticles.png

Unused sparkling particles, intended for when Peach descends to the ground.

Unused Music

Unused channel data for Donut Plains, presumably meant to be played on the triangle channel.

Partially-Unused Level

SMWNES TitleLevel.png

The entirety of the level featured on the title screen. Only the first half of it is seen in-game.


In any level, pause and press Up, Right, A, Down, Right, B, Up, Left to trigger a hidden JY logo screen, using the standard full-screen logo found in most JY-published games. The only way out is to reset.

Versions of the logo appear in-game as the sun in the background of Yoshi's Island 3, Donut Plains 1, and Chocolate Island 1, as well as Yoshi's House during the ending:

45-in-1 smw donutplains1.png 45-in-1 smw chocisland1.png 45-in-1 smw ending.png

(Source: Bootleg Games Wiki)

Object List

At address 0x090010 in the ROM, a truncated list of objects with associated pointers for their sprite handling code can be found. This is likely from an earlier point in development, as many pointers differ from those used in the final build.

EBoss01 9364H
EBoss01X 9389H
EBoss02 8CDBH
EBoss03 8000H
EBulubase 8A81H
EBuluchess 8640H
EBulufoot 8D59H
EBulugball 901AH
EBululook 843BH
EBulupress 87C8H
ECalon_lay 9A87H
ECap 99C7H
ECap1 9A0BH
ECap2 9A62H
ECapSt 8008H
ECar 8039H
ECarNo 96CBH
EColli 88E0H
EColli_fall 8517H
EColli_fly 82C7H
EColon_B 9980H
EDNock 8AB4H
EDisA 8926H
EDolap 866BH
EDolap1 866FH
EEgg 9562H
EElve 8544H
EEveF 885FH
EFan 8911H
EFball_45 8F15H
EFball_UD 8D95H
EFeather 9769H
EFire 9D9FH
EFire30 96F8H
EFire31 96F8H
EFire32 96F8H
EFireX 96D5H
EFireX1 96D5H
EFishbon 9519H
EFlower 9742H
EFootball 8E28H
EGndball 90C4H
EGrass 99A9H
EGreenGu 96B7H
EGwaKo 9660H
EHone_lay 93B7H
EHonmate 9279H
EI_telisa 9286H
EJump 9630H
EKiller 8BF1H
EKoopa 8939H
ELight 97C3H 
EMech 935DH
EMech1 95C9H
EN_ball 9632H
ENock 820EH
ENock1 820EH
ENock2 820EH
EPSw 9590H
EPada 820EH
EPag 9951H
EPass 9BF5H
EPonch 8CF2H
EPonch1 8E2BH
ERColli 8897H
ERaita 84B5H
ERedGu 9724H

A list of official names for each object in this list can be found below:

Internal Object Names
Internal Name Object
EBoss01 Reznor.
EBoss01X Reznor Fireball.
EBoss02 Lemmy/Wendy.
EBoss03 Morton/Roy.
EBulubase Baseball Chuck. Broken Romanization of its Japanese name, Bul/Bull (ブル Buru).
EBuluchess Chargin' Chuck, while chasing the player. Likely a misspelling of "chase".
EBulufoot Football Chuck.
EBulugball Diggin' Chuck. "gball" refers to the rocks, or "ground balls" they dig up.
EBululook Chargin' Chuck, idle after being hit the 1st & 2nd times.
EBulupress Chargin' Chuck, after being damaged.
ECalon_lay Crumbled Dry Bones. Broken Romanization of its Japanese name, Karon (カロン).
ECap Buzzy Beetle, uses old pointer.
ECap1 Buzzy Beetle shell, uses an old pointer.
ECap2 Spinning Buzzy Beetle shell, uses an old pointer.
ECapSt Several objects, such as Spike Top, the goal tape, Climbing Koopas, and other enemies.
ECar Platforms, ON/OFF switches and Fuzzies.
ECarNo Countdown Platform.
EColli Galoomba. Derived from a broken Romanization of its Japanese name, Kuribon (クリボン).
EColli_fall Parachute Galoomba.
EColli_fly Paragaloomba.
EColon_B Dry Bones. Oddly enough, it uses a different misspelling of Karon.
EDNock Super Koopa, uses old pointer. Derived from a broken Romanization of the Japanese name for Koopa Troopas, Nokonoko (ノコノコ).
EDisA Piranha Plant sprite mask? Uses old pointer.
EDolap Rex. Incorrect romanization of its Japanese name, Dorabon (ドラボン). Also uses an old pointer.
EDolap1 Squashed Rex, uses an old pointer.
EEgg Yoshi egg ? block.
EElve Galoomba and Fuzzy variant.
EEveF Unknown.
EFan Clown Car propeller? Pointer is very far from the final game's.
EFball_45 Diagonal Podoboo.
EFball_UD Vertical Podoboo.
EFeather Cape Feather.
EFire Horizontal Podoboo, uses an old pointer.
EFire30 Yoshi fireball (top).
EFire31 Yoshi fireball (middle).
EFire32 Yoshi fireball (bottom).
EFireX Player fireball 1.
EFireX1 Player fireball 2.
EFishbon Fish Bone.
EFlower Fire Flower.
EFootball Football.
EGndball Rock. Short for "ground ball".
EGrass Vine.
EGreenGu 1-Up Mushroom. Romanization of Chinese 菇, which means "mushroom".
EGu Bonus Block 1-Up Mushroom.
EGwaKo Koopa shell. Romanization of Chinese 龜殼, which means "tortoise shell".
EHPSw P-Switch (from block).
EHone_lay Crumbled Bony Beetle. Romanization of its Japanese name, Hone Met (ホネメット, Hone Metto).
EHonmate Bony Beetle.
EI_telisa Boo Buddy generator. Incorrect Romanization of Boo's Japanese name, Teresa (テレサ).
EJump Trampoline.
EKiller Bullet Bill. Uses its Japanese name (キラー).
EKoopa Likely Bowser, uses a different pointer.
ELight Enemy "pop" sprite.
EMech Mechakoopa. Uses an old pointer.
EMech1 Stomped Mechakoopa. Also uses an old pointer.
EN_ball Spike ball.
ENock All Koopa Troopa variants. Broken Romanization of its Japanese name, Nokonoko (ノコノコ).
ENock1 Unknown Koopa Troopa variant.
ENock2 Unknown Koopa Troopa variant.
EPSw P-Switch.
EPada Koopa Paratroopa. An incorrect Romanization of its Japanese name, Patapata (パタパタ).
EPag Bonus coins and ? blocks.
EPass Checkpoint, uses an old pointer.
EPonch Volcano Lotus. Uses an old pointer. An incorrect romanization of its Japanese name, Ponkey (ポンキー Ponkī).
EPonch1 Volcano Lotus fireballs. Uses an old pointer.
ERColli Upside-down Galoomba.
ERaita Dino Rino. Uses an old pointer and its Japanese name (ライタ).
ERedGu Super Mushroom. Literally "red mushroom".