Yu-Gi-Oh! (Japanese: 遊☆戯☆王, Hepburn: Yū-Gi-Ō!, lit. "King of Games") is a Japanese manga series about gaming written and illustrated by Kazuki Takahashi. It was serialized in Shueisha's Weekly Shōnen Jump magazine between September 1996 and March 2004. The plot follows the story of a boy named Yugi Mutou, who solves the ancient Millennium Puzzle. Yugi awakens a gambling alter-ego or spirit within his body that solves his conflicts using various games.
Two anime adaptations were produced; one by Toei Animation, which aired from April to October 1998, and another produced by NAS and animated by Studio Gallop titled Yu-Gi-Oh! Duel Monsters, which aired between April 2000 and September 2004. The manga series has spawned a media franchise that includes multiple spin-off manga and anime series, a trading card game, and numerous video games. Most of the incarnations of the franchise involve the fictional trading card game known as Duel Monsters, where each player uses cards to "duel" each other in a mock battle of fantasy "monsters". This forms the basis for the real life Yu-Gi-Oh! Trading Card Game.