Mario Superstar Baseball is a
sports title for the
Nintendo GameCube and is the first installment of the
Super Mario Stadium series, being the first dedicated baseball game with characters of the
Super Mario franchise. Like most sports games of the
Super Mario franchise,
Mario Superstar Baseball is based on the traditional rules of the sport, in this case, but is differentiated with various
Super Mario-themed gimmicks and other mechanics. These include characters using
Star Skill abilities to cause the ball to behave differently; team captains have unique Star Skill abilities that cause a wide variety of special effects, such as attacking outfielders if batting or causing the pitched ball to behave erratically. Characters also have field abilities to differentiate themselves from other teammates.
Chemistry is a feature unique to the
Mario Baseball games, in which characters perform differently depending on whether they like, dislike, or are neutral to another character they are cooperating with. Additionally, most fields in the game include hazards that can affect outfielders, such as the
Piranha Plants serving as obstacles in
Yoshi Park. In addition to the main Exhibition mode, in which baseball can be played freely with up to two players, the game features a single-player oriented Challenge mode that has the player controlling a designated team captain and their preset team, recruiting other captains and team players to face off against
Bowser. The game also features the
Toy Field mode, in which individual characters play on an interactive baseball field and get
coins based on where the ball lands. Finally, the game includes several
Super Mario-themed
minigames with baseball mechanics, such as hitting
Bob-ombs to create fireworks or collecting gems in a baseball diamond while avoiding a
Chain Chomp. Toy Field and Minigames are the only modes that can support up to four players.