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