The second personality inhabiting Yugi's body, a 5,000-year-old gambling spirit of an ancient Pharaoh who resides in the Millennium Puzzle. Like his host, he shares a fondness for games and gaming culture, often referred to in the manga as Game King. He appears whenever Yugi's in trouble, challenging bullies and criminals to occult judgment games called Shadow Games and enforces Penalty Games to enact ironic justice (the default powers of a Millennium Item wielder). A defining character moment for him is when he decides to stop using them after finding out that the Millennium Items contain an evil intelligence. In the second series anime, Dark Yugi comes off as a lot more merciful as a character because this subplot is written out. As the story progresses to the point where he's more than just a split personality, he becomes more and more independent of Yugi and develops a desire to find out who he is and where he came from.