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