Mario & Luigi: Rivals in Adventure is a fictional Mario game in the RPG. It is created by MidGame Inc. and is rated everyone and is released only on the Nintendo DS like all the other Mario & Luigi games except Superstar Saga. The game shows much more use of the Touch Screen DS microphone than Mario & Luigi: Bowser's Inside Story. In addition, this is the second Mario RPG to feature Wario and Waluigi as playable characters. The game also features new enviroments and new bro items and new characters. Like Mario and Luigi, Wario and Waluigi have their own command buttons. X is for Wario, and Y is for Waluigi. The main focus of the game is the four heroes trying to stop the evil Princess Shroongi and her sidekick, Cackful. Also, three users helped improve the game, Waddel Dii, Arend, and Stel