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