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

This article pertains the the beta elements from Super Mario World 2: Yoshi's Island.

Beta elements
This game was going to have more forms Yoshi could turn into: a Mushroom, a Tree, and a Plane (most likely replaced by the helicopter form). There are Tweeter sprites present in the game's coding that looked identical to the Tweeters of Super Mario All-Stars, and a Super Mario All-Stars Shy Guy is also present within the game. There are also some Bob-Ombs using the wrong palette. It is possible that the programmers were merely using these sprites as references for enemy sprites that they were remaking, and either didn't use the Tweeter or it was never meant to be used and taken from Super Mario All-Stars by mistake. There is also a frowning, rock-like block present in the game's coding, and, perhaps even more oddly, a hulking, barrel-throwing, tie-clad Grinder that seems to deliberately resemble Donkey Kong. It is possible that this gorilla-like Grinder would be a Kamek-strengthened Grinder boss and clever reference to Mario's first enemy. There is also a Biting Bullet Bill that is fully functional but is unused.