Bombarossa

These enemies float around in some dungeons, and explode on contact. Some patrol a small area, and must be avoided, whilst others remain stationary. Stationary Bombarossa sometimes form puzzles which must be solved by exploding them in a particular way to result in a chain explosion to activate switches.

Quote from The Legend of Zelda: The Minish Cap Bombarossa figurine: "Appears in dungeons. They float in the air and explode when touched. Walk carefully, and you may escape unhurt..."