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