Music Key

Music Keys are items Mario (or Luigi) needs to retrieve in Dance Dance Revolution: Mario Mix. The Music Keys give the power of music, and they are locked up safely until Waluigi steals them from Truffle Towers and takes one for himself, releasing the other three into the ocean, Wario's carnival, and a huge Freezie. After the keys are stolen, Mario and Toad attempt to retrieve them from Waluigi. Mario and Toad eventually do so and return to Truffle Towers, but Bowser appears and steals the Music Keys. Mario and Toad follow him to his castle and steal the keys back. After losing a dance-off to Mario, Bowser confesses he was going to use the Music Keys to fix his tone-deafness. Mario then uses the keys to turn the area surrounding Bowser's Castle into a green field, causing everyone to start dancing. Afterwards, the Music Keys are returned to Truffle Towers.