Twinbellows

Twinbellows is a recurring boss in the Kid Icarus series. It is a two-headed dog and notable for being the first boss in the original Kid Icarus for the Nintendo Entertainment System.

Kid Icarus
Twinbellows is the Gatekeeper of the Underworld's Fortress and guardian of one of the Three Sacred Treasures. He stays in the bottom right-hand corner of the room, moving back and forth spewing fireballs at Pit. The fireballs usually pass overhead, and Pit can openly attack Twinbellows when its preparing for another attack.

Kid Icarus: Uprising
A boss greatly resembling Twinbellows has been seen to be a boss in the new upcoming, long-awaited sequel, Kid Icarus: Uprising. Pit is seen fighting it in a huge coliseum.