Joker

Joker, also known as Jack Napier is a character from the DC Comics Universe. He was featured as a non-meetable character at the Batman Party. He is the sworn enemy of Batman and had a hand in breaking out of the Arkham Asylum prison.

History
Joker possesses no superhuman abilities, instead using his expertise in chemical engineering to develop poisonous or lethal concoctions and thematic weaponry, including razor-tipped playing cards, deadly joy buzzers, and acid-spraying lapel flowers. He sometimes works with other Gotham City supervillains, such as the Penguin and Two-Face, and groups like the Injustice Gang and Injustice League, but these relationships often collapse due to the Joker's desire for unbridled chaos. Joker's main characteristic is his apparent insanity, although he is not described as having any particular psychological disorder. Like a psychopath, he lacks empathy, a conscience, and concern over right and wrong and is described as capable of processing outside sensory information only by adapting to it. This enables him to create a new personality every day (depending on what would benefit him) and explains why, at different times, he is a mischievous clown.

On December 10, 2019, Joker finally made an appearance and had kidnapped Commissioner Gordon. He plans on bribing the penguins to release all the villains captured in exchange for Gordon or he would never be seen again.

On December 11, 2019, Joker tricks penguins to go check Beacon while he places a bomb at the Batcave. His plans were cut short as they stopped him and he was caught.

Trivia

 * Joker never visited Club Penguin Online.
 * There was a special Postcard, Team Joker Postcard on which he appeared.
 * He was based on Joker.
 * A custom Pin was released called the Joker Pin, based on ace joker cards that Joker uses.
 * Penguins could dress up as him by wearing The Joker's Hair, The Joker's Tie and The Joker's Suit.
 * Players were rewarded with a background called The Joker's Background where he appears.
 * His mugshot could be seen in the case files, given by the Commissioner Gordon.