Mario and Luigi battling in the Trash Pit.
The Trash Pit is the place in Bowser's Body where the Mario Bros. wake up after being inhaled by Bowser. It is apparently located in Bowser's large intestine. After waking up, Mario then stumbles upon Starlow, who is trapped in a bubble. Once Mario frees Starlow, a Goombule battles him. After the battle, Mario and Starlow proceed into another room, where they find Luigi, attached by his head to a pipe-like object with a bubble. They free him, and then stumble into ten Attack Pieces, and Mario and Luigi learn how to kick a shell at their enemies. Mario and Luigi also learn to use the hammer in this area.