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