It is one cool game to play. It is the third title in the Mario & Luigi series, preceded by Mario & Luigi: Superstar Sega for the Game Boy Advance and Mario & Luigi: Partners in Time for the Nintendo DS, and succeeded by Mario & Luigi: Dream Time and Mario & Luigi: Paper Jam for the Nintendo 3DS. Unlike its predecessor, this game makes much greater use of the DS touch controls and microphone.
Although it had a kinda weird plot involving Mario and Luigi being inhaled into the body of their long-time nemesis, Bowser. The Mario brothers learn to assist Bowser, who is unaware of their presence, as he combats Fawful, who has taken control of the Mushroom Kingdom. The gameplay focuses on the co-operation of the trio, who use their specific abilities to solve puzzles and fight enemies and thus progress through the game. Similar to its predecessors, its role-playing style emphasizes a turn-based battle system focused on timing accuracy, and is comedic in nature.