|First Appearance||Mario Tennis|
|Latest Appearance||Mario Tennis Open|
Waluigi is a character introduced to the Mario universe in Mario Tennis. Waluigi is the brother of Wario, and was created as an opposite of Luigi. He continues to appear in games such as Mario Party 9, and all Mario Sports Games, and is rumored to soon be getting his own game starring Waluigi and Wario. It is thought Nintendo would like for him to have his own game, but he is still partly owned by Hudson Soft. It is suggested that his personalty is of a devious nature, dealing with very sneaky and deceptive power moves.
 Game History
Waluigi would appear in Mario Tennis Open as one of the starting characters of the game. Waluigi is a defence type character. Players could purchase tennis equipment of his through the shop of the game after they become available. A Waluigi costume could also be unlocked after the player has collected 800 coins in Super Mario Tennis 2-4.
Waluigi appears as a playable character in Mario Party 8.
Waluigi appears as a playable character in Mario Party 9.