Arm Center

The Arm Center is a location inside Bowser's body in Mario & Luigi: Bowser's Inside Story. It is located in Bowser's right arm. Mario and Luigi go here to stimulate the muscles, increasing strength over Bowser's arms, allowing him to perform different tasks, making the story able to progress. This area is visited four times, and the mini-game it features gets harder and faster as the player progresses. The mini-game requires Mario and Luigi to hit balls of light back at the muscles of Bowser's arm. The balls are shot from the small cannon at the base of the muscle. If the ball is red, Mario must hit it with his hammer; if it's green, then it's up to Luigi.