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