Crazy Hand is the secondary antagonist of the Super Smash Bros series, and is Master Hand's left hand and brother.
LOTM - Birth of Miracle Elite[]
After Grapefruit tells Izaya that The Nazis caught Midget Apple and Marshmallow first, he sends Master Hand and Crazy Hand after him and they tried to eat him, but Izaya figures he could still be useful, so he has them spit him out.