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