Yoshi Cloud

The Cloud is an object that appears in Super Mario World. It resembles a little Lakitu's Cloud, complete with a smiling face.

Super Mario World
When Yoshi eats two Pink Berries, he will hatch an egg with a Cloud inside. The Cloud then hovers above Mario and pops out ten Bonus Coins, after which it flies away. If Mario manages to collect all ten Bonus Coins, the Cloud will reward him with a 1-Up Mushroom. The Cloud can only appear in Cookie Mountain, Forest of Illusion 1, Forest of Illusion 3, and Groovy as these are the only levels with more than one Pink Berry.

Super Mario-kun
In chapter 8 of volume 2, while fighting a Jumping Pumpkin Plant, Mario falls on Yoshi, making him pop out an egg. Inside, a Cloud appears. Mario jumps on it and eats the Bonus Coins, becoming the big-headed Nikoniko Mario, scaring off the enemy.