List of Mario Party Advance pre-release and unused content
From the Super Mario Wiki
This is a list of pre-release and unused content for the game Mario Party Advance.
Early screenshots has shown that Shroom City would be really different from what it looks like in the final version. Also, the die is replaced by a Mushroom. Several minigames have been changed in the final version. Pipes replaced the cannons in the final version of Shell Stack, and many backgrounds were changed. Also Mario Party Advance was going to have a different logo, but it got replaced for unknown reasons.
There are several unused icons for minigames and Gaddgets in the game's data. Two of them are placed next to the other gambling minigames' icons, while the others have been crossed out. As the icons were not stored with any other data, their original purpose is unknown. The one exception is the crossed-out icon for the Toad Force V Gaddget: although the Gaddget itself appears in-game, it is not played through standard means, and as a result, its icon is never used.