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