Joker is an insane supervillain and sworn enemy of Batman found not only in Gotham City but also in the LEGO cursor for a mouse called Joker and Card! Joker looks like a real clown, and after falling into a container with chemicals, he acquired white skin, bright red lips, green hair, and a smile from ear to ear. Joker is an incredibly dangerous and unpredictable villain who commits insane atrocities and uses weapons disguised as circus props.