Flomp

Flimps are a new type of enemy appearing in the game Super Mario Galaxy 2. They appear as a green platform with spikes on their sides and have a similar face to a Pushy Wall. They move from side to side. At first glance, they seem like ordinary platforms, but after a few seconds, they make a malicious face and quickly flip over. If Mario or Luigi was on one of these platforms when they flipped, they would be knocked high into the air. They appear in only 2 galaxies, Bowser's Lava Lair and the Grandmaster Galaxy.

Trivia

 * Flimp is a pun of "flip" and "Thwomp".