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