New super Mario Bros. has many Unused features. New super mario Bros. has unused Music Tracks. Called BGM_CHIJO, and BGM_AMB_CHIKA. Theres also 5 unused courses for New super mario Bros. Course 1 & 3 has corrupted Backgounds Course 3 had a glitchy chain chomp that froze the game. To make the level playable, replace the chain chomp. Unused 2, 3, 4 & 5 has "Glitchy Sprite 0" that crashes the game.