Pouncer

Pouncers are stone creatures from Wario Land: Super Mario Land 3. They look and behave almost exactly like Thwomps, except they have no spikes on their tops. Wario can hop up on them as a platform to cross gaps.

If a Pouncer lands on an enemy, it turns into a 10 Gold Coin for Wario to collect. On the other hand, contact with a Pouncer's spikes instantly causes the loss of a life.