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