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