Jack Napier (Earth-Prime)

"A man dressed like a clown... green hair, purple suit, big, ugly smile..."

- Jada Jet

Jack Napier was the criminal known as the Joker. He was the arch-enemy of Batman for many years before being killed by him in 2015.

Early Life
At some point, Jack Napier became the criminal known as the Joker. He became an associate of Harley Quinn and employed a woman named Kiki Roulette to design his weapons, including his acid flower, boxing glove gun, flag gun, joy buzzer, and nerve gas bombs. They all operated out of a workshop in Gotham City.

Eventually, his criminal behavior caught the attention of Batman, resulting in the two becoming arch-enemies. After one encounter, Batman confiscated Joker's acid flower and stored it in the Batcave alongside the other bat-trophies.

Chaos on Bridge
On January 26, 2003, the Joker hijacked a school bus full of children and was subsequently pursued by Batman. Whilst on the bus, he placed his joy buzzer on Marquis Jet's head, which sent an electrical charge through his brain that turned off his ability to empathize with others. He then rammed the bus into the Kane family's car, resulting in the death of Gabi Kane and the subsequent kidnapping of Beth Kane. He was then apprehended by Batman and locked in Arkham Asylum, who also confiscated his joy buzzer as one of the bat-trophies. At some point after this, the Joker broke out of Arkham.

Later Life and Death
At some point, the Joker broke into the house of a man who owned a painting containing the location of Coryana, murdering him and using his intestines to paint his own work. In 2015, Batman finally grew tired of the Joker's behaviour and killed him as a result, though it is widely believed that he is still locked up in Arkham Asylum.

Abilities

 * Artistry: Napier was a skilled painter.
 * Gadgetry: Napier was proficient in the use of several gadgets created by his toymaker, Kiki Roulette.

Weaknesses

 * Mental Instability: Napier was extremely mentally unstable, resulting in him becoming a mass murderer.

Former Equipment

 * Acid Flower: Napier utilized an acid flower whilst operating as the Joker.
 * BANG! Flag Gun: Napier utilized a non-lethal firearm with a flag with the word "BANG!" written on it whilst operating as the Joker.
 * Boxing Glove Gun: Napier utilized a boxing glove gun whilst operating as the Joker.
 * Joy Buzzer: Napier utilized an electrical joy buzzer which caused severe brain damage to his victims.
 * Smiley Face Nerve Gas Bombs: Napier utilized a series of gas bombs whilst operating as the Joker.

Trivia

 * In, a bloody crowbar was seen in the Joker's workshop. This is a reference to the Death in the Family storyline and the death of Jason Todd. The murder was later mentioned in the following episode, , where Kiki Roulette claimed to have assisted him in killing Robin with a crowbar.