Mario & Luigi: Bowser's Inside Story is a Nintendo DS RPG starring Mario, Luigi, and Bowser in a split-perspective Mushroom Kingdom adventure. The story begins when Bowser inhales the brothers, forcing them to help power up their longtime nemesis from inside his body while facing Fawful.

• Cleaned, tested, and guaranteed to play. Authentic cartridge.
• RPG gameplay mixes character leveling, timing-based battles, exploration, and comedy-driven story events.
• Bowser is playable in overworld and battle sequences, using bash, burn, and combat abilities against enemies.
• Mario and Luigi explore 2-D areas inside Bowser, switching between the brothers and Bowser as the adventure progresses.
• Bowser can inhale Fawful's minions, shifting the action to Mario and Luigi inside him.
• Game content includes French and Spanish language options.

The game is part of the Mario & Luigi RPG series and centers its main mechanic on swapping between Bowser’s outside actions and the brothers’ inside-world progress.