Joker was a hitman who worked for Sal Maroni, before being bathed in chemicals and becoming an insane criminal and Batman's (arguably arch-) enemy. This is the Nygma Universe version of the character.
Fictional Character BiographyEdit
Nothing is known about Joker's early life up until he became a hitman for Sal Maroni. As a hitman, Joker killed at least forty people over a ten year span.The only thing known about his identity is the name Jackson, which could be his first, middle, or last name, or even just an alias.
- Batman: Gotham Guardian