Dizzy Dandy
From the Super Mario Wiki
Dizzy Dandies are giant flowers that resemble normal Flowers in Super Mario World 2: Yoshi's Island and Yoshi's Island DS. When Yoshi strayed near, or egged them, they would laugh and drop to the ground rolling, squashing any enemies. Unfortunately for them, they would usually fall to their own demises in a hole or water.
A trick involving Dizzy Dandies can be found in the Monkeys' Favorite Lake level. The player can go to the area with several Dizzy Dandies, Spear Guys, and water pits. If one falls down to Yoshi, while it's rolling in the shallow water, Yoshi should swallow a Spear Guy. When the Dandy is about to fall down into a pit, Yoshi should spit out the Tribal Guy at it. If timed right the two should collide, making a spinning fireworks display.
