Yoshi's Island Location

IslandIslandYoshi

Yoshi's Island is a 2D side-scrolling platform game. Its story begins as a Magikoopa of the Koopalings attacks a stork delivering baby brothers Mario and Luigi.They succeed in kidnapping Baby Luigi, but Baby Mario falls out of the sky and onto the back of Yoshi, the titular friendly dinosaur and player-character of the single-player game.

Yoshi's Island Location Island

We don't have a clear, localized source for all the tools for YI, so... Here is a list of currently available tools for Yoshi's Island, download links, and what they can do:
Name - Link - Purpose
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GOLDEN EGG v0.005 - Link - LEVEL DESIGN EDITOR, primary tool to mod YI
Ycompress - Link - Decompresses the graphics for editing in YY-CHR or other graphics editors
BTD6_maker's YI Text Editor - Link - Allows editing of all text boxes
YI Entrance Editor - Link - Edits level start points; do not use midring.exe, only yientrance.exe
Better Middle Rings - Link - Patch that makes it easier to edit Middle Ring restart points, requires asar to patch; recommended over the above for midrings
YI Sprite Set Editor - Link - Edits spritesets to use different combinations of sprites together
Yoshi's Island Level Tool - Link - Exports levels from and imports levels to ROMs
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Please feel free to post any others you find/create in this thread, and I will update this post as tools are posted.