Gemon

Gemon is a giant pitch-black griffin monster that's a recurring boss in the Dragon Quest series. He originates in Dragon Quest VIII. In Dragon Quest Monsters Joker 2 he and Jamirus  reside at the top of Cragravation and keep Melonie imprisoned. The scout hero and Captain Rex Mayday team up to take them down, the player having to fight Gemon as the boss. It can be synthesized with a Jamirus and a Pazuzu.