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