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