World:Gotham's Finest/Gotham's Most Wanted/Notable Criminals/The Joker
Height: 6' 0"
Weight: 160 lbs (73 kg)
The Joker is a serial killer and a super-villain, a dangerous madman who dresses like a clown and commits violent crimes. In addition to being a deadly and unpredictable physical combatant, he is a brilliant and ruthless criminal mastermind. His crimes require no motivation other than his sadistic desire to show people the meaninglessness of life through pain and death, and the narcissism to see the world remade in his own image. He is constantly adapting his personality and his psychosis to respond to the world around him, sometimes a harmless trickster and at others a brutal mass-murderer.
The Joker's insanity appears to be a strange mixture of violently aggressive psychopathy, nihilism, and fixated narcissism. He has frequently been shown to have no regard for human life, and treats the pain and suffering of others as personal sport. While frequent attempts have been made to pin down or classify the Joker's 'insanity', none have been consistently proven successful. And every attempt to cure him has proven likewise completely fruitless, as the Joker actively and energetically resists separation from his madness.