List of Super Mario World 2: Yoshi's Island pre-release and unused content

This is a list of pre-release and unused content for the game Super Mario World 2: Yoshi's Island.

Early iteration
Nintendo marketing department initially pressured Shigeru Miyamoto to have the game use prerendered 3D sprites similar to Donkey Kong Country. The 3D models of Baby Mario and Yoshi used in the introduction might be leftovers of this period of development.

Unused data
This game code includes sprites for what appears to be several forms that did not make the final cut: Among them, a mushroom, a tree, and a plane (which was likely replaced by the Helicopter).

Several sprites from Super Mario All-Stars are present in the final release's code. These include Tweeters, a Super Mario All-Stars Shy Guy and Bob-ombs using the wrong palette. There is also a frowning, rock-like block present in the game's coding, and a hulking, barrel-throwing, tie-clad Ukiki that resembles Donkey Kong. There is also a Biting Bullet Bill that is fully functional but is unused. Finally, there is a Yoshi Egg frame never seen elsewhere. When viewed the Japanese version in ROM form, there also unused Mini-Battles sprites, such as a Shy Guy, a shiny sphere, Baby Mario (this originally want Baby Mario to Watch Yoshi in Mini-Battles), and obviously, a Bandit's face in a shocking expression (originally meant to be using facial expressions on the Bandit, as used when Bandit loses in the Throwing Balloons Mini-Battles). There are also three unused Mini-Battles. If the PAR (Pro Action Replay) codes for the transformations are used, the tree is playable, but freezes the game, and so is the mushroom, so the player will transform into a Blank Yoshi.