Bio: Described as a "monster" and a "psychopath" by the aging
Bruce Wayne, the original Joker was a sadistic clown who delighted in
tormenting the first Batman and his allies.
A one-time nameless underworld gun for hire, the man who would become
the Joker once fought Batman during a botched robbery at a chemical
plant and fell into a vat of acid. The accident scarred both the
criminal's face and mind. Now calling himself the Joker, the madman
embarked on a campaign to make every citizen of Gotham a victim of his
Joker's determination to wreck havoc on the city continues into the time
of Batman Beyond, as the clown has apparently returned, alive,
unchanged, and in his words, "Ready to give this old town a wedgie
Bio: When The Joker showed up at Bruce Wayne's ceremony for his return
to Wayne / Powers, he and Terry were both confused by how he was
seemingly able to rise from the dead. It was soon revealed to Terry that
The Joker had once captured Robin (Tim Drake) and turned him into "J.J."
or "Joker Jr." During this time, The Joker took state of the art
technology and implanted a microchip with his DNA that would allow him
to take over Tim Drake's body at will, enabling to be "alive" in the
The Joker attempted to make Bruce and Terry's lives a living hell by
taking away all they cared about--Joker sent out his Jokerz to injure
Terry's girlfriend, Dana. After gaining control of a super-laser now in
orbit around Earth, Joker began setting his targets; first was the
hospital that Dana was staying at; he then targeted the apartment
complex in which Terry's mother and brother were living. For Wayne, he
targeted Wayne Manor, knowing the blast would destroy the Manor and the
massive cave below.
Joker was stopped once Terry confronted him in a fight to the death;
Terry took Joker's joy buzzer that had fallen off during Joker's fight
with Ace and fried the microchip on Joker's neck, returning him to Tim
Drake once and for all.