The Batman Who Laughs was created by Scott Snyder and Greg Capullo first appearing in the comic book Dark Days: The Casting.

The Batman Who Laughs (Bruce Wayne) is a supervillain appearing in American comic books published by DC Comics.

The Batman Who Laughs is the evil counterpart and alternate version of Batman within the dark multiverse. 

He is depicted as a hybrid of both Batman (Bruce Wayne) and Batman's arch enemy Joker, and is a member of the Dark Knights

His first appearance was in the crossover storyline Dark Nights: Metal, before receiving his own series and serving as the main antagonist in Batman/Superman in 2019.

The character was depicted as an alternate universe Batman who does not have a code against killing.