This is a made-up game from P&F Games Inc.. Whoever you are, YOU MAY NOT EDIT!
Yoshi's Island: Challenge is a more challenging version of (a mix of) Super Mario World 2: Yoshi's Island and Yoshi's Island DS. Knuckles the Echinda and Tails guest star. It is revealed that Tails is friends with Yoshi, and Yoshi despises Sonic.
The gameplay is similar to Yoshi's Island DS.
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