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