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