J-Man

was the leader of the most notorious Jokerz gang in the future Gotham City.

History
As leader, J-Man's costume bore the strongest resemblance to the original Joker, while other Jokerz dressed in some variation of clown costume.

Like his namesake, J-Man took a sadistic pleasure in playing "jokes" on random bystanders, and was occasionally known to play for higher stakes. However, although he seemed to fancy otherwise, he was a far cry from the real thing, something Bruce Wayne himself sarcastically noted in their first meeting.

Abilities
J-Man was mainly a prankster with a big ego, as such he had little in the way of actual threats. He mainly used his gang as his muscle, having little skills as a physical fighter.

Batman Beyond

 * "Rebirth"
 * "The Winning Edge"
 * "Joyride"
 * "Curse of the Kobra"