- Nintendo (self-proclaimed)
- Allies: YCBU Duck hunt dog, YCBU Smick, YCBU Lakitu, YCBU Bowser.
- Enemies: All players (rival/enemies)
- Origin: Tv spot (you cannot beat us)
- Occupation: Spokesperson
- Species: Vaguely Polygon Human
- Subspecies: Uncanny 3D model
- Gender: Male
- Mr sys. Also known as Mr. Steal your soul, is the main star from the Australian 1987 Nintendo NES commercial. He is a minor antagonist of GameToons Reloaded!
- Personality: Mr SYS is overconfident and egotistical