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. If the bombarossa is in your path, the safest way to avoid them would to jump over them using the Roc's Cape.

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..."