“Greeting’s Gotham! Uncle Joker is here again!”
Jack Napier was known to the underworld of crime in Gotham as the sly and slick yet very twisted gangster, who rose from the lower ranks to breaking off and starting his own gang. One night, during a heist at the Ace Chemical Plant, Jack was confronted by the caped crusader, Batman, who at the time was nothing more then a detective in a batsuit. After a few exchanges and rumbling on a catwalk above one of the vats of deadly chemicals, Batman caused Napier to fall into the into the deadly chemicals and die. His men escaped and Batman assumed, like everyone else there that night, that they would never hear from Jack Napier ever again.
That was not entirely true, for Jack Napier died, while bringing to life his new psychotic and even more twisted personality, simply known as the Joker. The chemicals also dyed his hair a dark shade of green, bleached his skin ghostly white, his face stretched into an almost permanent smile, and left with the most bizarre sense of humor in all of history, with a new ego to match.
Joker returned to Gotham a few days after the Ace Plant incident and declared war not only on Gotham’s police department, every mob in Gotham, but he personally swore to cap Batman off in the most fitting joke, the one that makes him laugh to death. Every crime thus after that the Joker committed was all revolved around jokes, laughter, and toxic. The chemicals from Ace also increased his knowledge of chemistry itself. The Joker is notorious for his trademark deadly laughing gas, super jolted joy buzzers, and poisoned lapel flowers.
Suddenly, Gotham started building up a collection of super villains, each more demented and twisted as they popped up, forming an official circle known as Batman’s Rouges Gallery. Though no leader was ever declared, it was widely believe by everyone but those in the gallery that the Joker, or the Clown Prince of Crime and Gotham, was the most dangerous and therefore it’s highest ranking member.
But no matter how he tries, Batman always seems to foil his plots and sends him to Gotham’s Arkham Asylum, for the criminally deranged. It was there Joker took sweet innocent Dr. Harleen Quinzel, who was known for attachment issues, and corrupted her into his own personal henchmen, by claiming he was her soul mate and lover, turning her into Harley Quinn. Together they have escaped Arkham a number of times, and also returned, making sure they are not placed anywhere near each other upon their arrival back into the mad house.