A single player action RPG (Role-playing Game), Mario & Luigi: Bowser's Inside Story takes players on the DS literally into the belly of the beast - that beast being Bowser. Set within an off-the-wall storyline that turns the world of Nintendo on its ear and featuring the ability to toggle between playing as the team of Mario and Luigi, and playing as Bowser himself, this third installment of the Mario & Luigi franchise is not to be missed.

Two Separate Storylines - One features Bowser and his efforts to stop an arch-villain from taking over his castle. Meanwhile, inside Bowser, the microbe-sized Mario and Luigi must muscle their way through challenges and keep their nerve if they want to find a way out. They take action to control Bowser from the inside – but without his knowledge.

Switch Between Storylines at Will - What happens inside Bowser affects what he’s doing on the outside. Sometimes Mario and Luigi must solve puzzles and challenges behind the scenes to help Bowser overcome various obstacles and advance the plot.

DS/DSi Integrated Gameplay - In some battles, Bowser grows so large that players must turn their Nintendo DS or Nintendo DSi system sideways, blow into the microphone or tap on the touch screen with the stylus to keep up with the action.

Distinctive Nintendo Humor - The game features the same hilarious dialogue that has been the hallmark of the Mario & Luigi series.

RPG Gameplay - A players work their way through challenges they can level characters up with experience points.