Do you want to compare Ultron with Mephisto? Discover the powers, weakness & weapons of Ultron and Mephisto from Ultron Biography and Mephisto Biography. Find out all about Ultron and Mephisto.# Check out how is Ultron unique and distinct from Mephisto. Discover their love interest, sidekicks, family tree and the movies and games list in which Ultron and Mephisto have appeared. Find out everything about them here!