Alvin and the Chipmunks Cheats for Nintendo DS
To perform this glitch go to the 'Song' menu where one of the songs will be playing and select that song. Then quickly press 'Start' and resume gameplay and the song will continue playing.
To let alvin free all you have to do is, jump up and then do the smash atack. The smash atack buttons are left, right, up , down, up.