Joker (Earth-1: Post-Crisis)

"Gotham City and me, we just... Have a bad history with freaks dressed like clowns."

- Bruce Wayne

An unnamed man known only as The Joker is an infamously brutal criminal from Gotham City.

Murder of Robin
Around 2005, Joker had a run in with Robin. He murdered the latter and painted on his chest piece the words "HAHAHA! Joke's on you, Batman!". Enraged, Batman knocked Joker's teeth out and placed him in Arkham Asylum.

Arkham Asylum
In Arkham Asylum, Joker got metal fillings for his teeth and tattooed the word "Damaged" on his forehead as a message for Batman saying, "You've damaged me. I was so beautiful before and now you've destroyed my face."

DC Extended Universe

 * (indirectly mentioned)
 * (flashbacks)
 * (flashbacks)

Trivia

 * This is the only live action version of the Joker to have short hair.