No one knows how the Joker came to be. All anyone knows is that he is the worst villain that Batman ever fought. The Joker also was a crime-lord who had control of everything that came in and went out of Gotham. For years Batman and his sidekicks tried to stop him. On the night that his organization was busted, he sent someone to Kill Selena Kyle, and after escaping from the police, he went after Batgirl. He shot, and brutally wounded Barbara Gordon. The Joker was again captured, and is now rotting in the Arkham Asylum.
Real Name: Unknown
Occupation: Criminal
Marital Status: Single
Base of Operations:Gotham City
Height: 5ft 5in
Weight: 192 Lbs.
Eyes: Green
Hair: Green
First Appearance: Pilot
Portrayed By: Roger Stoneburner & Voiced By: Mark Hamill
POWERS
• Pain Resistance: It is speculated that the Joker's exposure to chemicals may have heightened his resistance to pain.
• Tainted Blood: Joker's blood is tainted. It has been said that "being an avid consumer of his products, Joker's immunity to poisons has been built up over years of dedicated abuse." When a mosquito sucks the Joker's blood, it "writhes and whines, choking on tainted blood".
ABILITIES
• Inventive Skill: The Joker commits crimes with countless "comedic" weapons (such as razor-sharp playing cards, acid-spewing flowers, cyanide pies, and lethally electric joy buzzers) and Joker venom.
• Genius-level Intellect: The Joker is also very skilled in the fields of chemistry, genetics, and nuclear engineering. He also seems capable of mastering whatever he puts his twisted mind to when he wants to. In a miniseries featuring the third Robin, he kidnaps a computer genius, claiming he is not too good with computers; however, later writers portray him as highly computer literate.
• Skilled Combatant: Although he pales in comparison to any real fighter like those of the Batman Family, the Joker has frequently proven himself to be an excellent hand-to-hand combatant. While apparently of frail body, his ability to withstand seemingly any amount of pain, and the agility granted him by his insanity and willpower makes him a fearsome physical foe. He fights nearly completely unpredictably, and always has tricks up his sleeves for if he's losing. However, Batman and his allies often seem to be able to put him down with a single punch... but it is unclear whether or not he is simply allowing this to happen.
WEAPONS
• Joker Venom: a deadly poison that infects his victims with a ghoulish rictus grin as they die while laughing uncontrollably. This venom comes in many forms, from gas to darts to liquid poison, and has been his primary calling card from his first appearance.
Razor-sharp playing cards, acid flower, Joker Venom - a compound consisting of strychnine and household chemicals the Joker can re-create at will, various guns and other weaponry. The Joker is unpredictable in that he will use any kind of weapon afforded him.
• Joker's joy buzzer
The Joker often used a modified novelty joy buzzer strapped to the palm of his hand. The buzzer administered a lethal dose of electricity into anyone who came into contact with it.