Yu-Gi-Oh!

A boy named Yugi Mutou solves the Millennium Puzzle which turns in into the "King of Games".

A criminal escapes from jail and takes Anzu as a prisoner. Yugi shows his other self by using the Millennium Puzzle as he challenges the criminal to a Shadow Game in order to get Anzu back.

Seto Kaiba is a new student in Yugi's class and he is also a Duel Monsters (a card game) expert. After he steals the Blue-Eyes White Dragon from Yugi's grandfather, Yugi challenges him to a duel where the cards are real. The game remains a tie and Yugi gets his grandpa's card back.

Honda buys a watch for Miho and he gets lucky because he gets the last one. When a guy that collects watches sees that there aren't anymore, he steals the watch from Miho only to be stopped by Dark Yugi right in time. Yugi challenges him to a Shadow Game for the watch as the watch collector loses and Yugi returns the watch to Miho.

A man from ancient Egyptian comes at the museum where he sees Yugi with the Millennium Puzzle. He travels in Yugi's mind to see if the puzzle really belongs to Yugi. In there, Dark Yugi challenges him to a game where the man from Egypt must find the real door which has the Millennium Puzzle in it. In the end, the man from Egypt loses and he tells Dark Yugi that he really is the owner of the Millennium Puzzle.

Shadi, the man from Egypt, challenges Yugi to a Shadow Game, with Anzu's life as the prize.