Dry Bones

In Brawl
Dry Bones appears as a trophy It reads:A skeletal member of the Koopa Troopa family. Immune to fireballs, Dry Bones will fall apart when stomped upon, then reassemble moments later. They're typically found in dungeon levels in Mario games but have also been known to participate in various sports and activities such as baseball, kart racing, and soccer. They're likely boning up on the competition.

Trivia
Dry bones is one of few Mario enimies that don't appear in sse