Deathpower

Mac Datar is the last monster to appeared in the last episode of The☆Ultraman.

History
A muscled brute from a distant world, Deathpower was freed from the monster asylum. Once freed, the monster didn’t join its brothers in destroying the Earth, but remained behind, guarding its masters. When the invasion was stopped by Ultraman Jonias, the creature was one of the last surviving behemoths of the asylum.