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The Joker of Earth-51 bore many similarities to his New Earth counterpart. He was a psychotic maniac with the visage of a clown, garbed in a garish purple suit and was endlessly matching wits against the Batman. Also like his counterpart, this Joker murdered that reality's version of Jason Todd. As a result, Batman suffered a breakdown and became more violent and aggressive. Brandishing a handgun, he tracked down the Joker and avenged Jason Todd's death by shooting him to death.
- Mental Illness: Like most versions of the Joker, the Earth-51 Joker was hopelessly insane.
- This version of the Joker is germane to the original iteration of Earth-51 prior to its destruction by Monarch and Superboy-Prime.
- Another version of the Joker later came to Earth-51 as part of Monarch's Army and was killed by the New Earth Jason Todd, now under the guise of Red Robin. This version of the Joker was not native to the Earth-51 reality. 
- 3 Appearances of Joker (Earth-51)
- 2 Images featuring Joker (Earth-51)
- Quotations by or about Joker (Earth-51)
- Character Gallery: Joker (Earth-51)
|Batman Villain(s) |
This character, team or organization, is or was primarily an enemy of the Batman, or the Batman Family as a whole. This template will categorize articles that include it into the category "Batman Villains."