Magnifying Glass (Super Mario World 2: Yoshi's Island)

The Magnifying Glass is a Special Item used for finding red coins in Super Mario World 2: Yoshi's Island and its reissue, Yoshi's Island: Super Mario Advance 3. It can be found in any of the Bonus Challenges, and when it is used, its effects continue until a Yoshi either loses a life or reaches the end of a level. The Magnifying Glass detects red coins that are disguised as regular coins and turns them red and visible to the Yoshi so he can more easily collect all 20 red coins in the level. The Magnifying Glass also reveals Winged Clouds that are otherwise invisible, except Winged Clouds that are revealed only by rolling a Chomp Rock or snowball over their locations.

Super Mario World 2: Yoshi's Island

 * Instruction booklet description: Shows you where all the Red Coins are in a Stage.

Yoshi's Island: Super Mario Advance 3

 * Nintendo 3DS digital manual description: Reveals hidden Red Coins.