Star Players are characters that were on the player's team when they beat Bowser in Challenge Mode. When a player is a star player, they can have the ability activated during the team selection screen before a game. When a star player is activated, all their stats go up by 1 point, therefore increasing how well they play, and they get a gold star next to their character. This ability can be used to make a game easier or harder, because you can make a CPU opponent use it too. All players can be star players, but they need to be on your team when beat Bowser in Challenge Mode first, with the exception of the players on Bowser's team.