Once an orphan, Joker was previously known as the Dark Curse causing trouble by stealing faces and gave them to monsters. He ultimately lost the fight to Purple Monkey and his allies. And instead of ending his suffering, he decides to save his life, resurrected as a human once more.

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Because of his newfound strength, he vows to become stronger and defeat him one day. Rivalry asides, he became P.M.'s best friend and teams with him for things that have yet to come.