He is Batman’s greatest nightmare come to literal life. The Batman Who Laughs is Bruce Wayne from a world in the Dark Multiverse where he has been infected with The Joker’s nanotoxin. Possessing a mind capable of thinking like both Batman and his greatest nemesis, the Batman Who Laughs has risen to a higher power than any mortal before him. BATMAN and all related characters and elements © & ™ DC. (s24)