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Joker is the protagonist of Persona 5, a PlayStation 3 and PlayStation 4 title. In his game, he is a Japanese high school student in his day life; however, he also has the power to access an alternate version of the world called the Metaverse. In said universe, he infiltrates the psyche of corrupted souls to steal their hearts, and he can summon Personas, powerful demon-like creatures.
During The Game Awards on December 6, 2018, it was revealed that Joker would be appearing as a paid downloadable playable character in Super Smash Bros. Ultimate. He is the second DLC character after Piranha Plant, and the first actual paid one releasing as "Challenger Pack 1".