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When a Yoshi hits a Winged Cloud with a Yoshi Egg, it disappears and reveals its contents or triggers an effect. Winged Clouds can contain objects such as flowers, five Stars, Extra lives and ! Switches, but sometimes also creates stairs or bridges or makes coins appear instead of revealing an item. There are Winged Clouds that contain even Bandits. When being hit, a Bandit pops out and chases Yoshi around to steal Baby Mario. Due to their function, they can be considered Yoshi's Island's equivalent to ? Blocks.
The Winged Cloud Maker is a Special Item that can be won in Bonus Challenges and Mini Battle Games, and it turns every enemy on the screen into a Winged Cloud. These most often contain coins or one star, but can sometimes contain an Extra Life.
Winged Clouds appear in volume 14 of Super Mario-Kun, also providing items when they are hit, such as a blue watermelon. Unlike in the games, however, Yoshi does not need to hit them with an egg to make them spawn items.
Yoshi's Island: Super Mario Advance 3
Yoshi's Woolly World
Poochy & Yoshi's Woolly World
Names in other languages
Winged Cloud Maker