Here are some cheats and tips for the game Bust-A-Move DS.
Sound test:
Press “Select, A, B, Left, Right, A, Select, Right” at the main menu.
Another World:
Complete all “A” levels in Puzzle mode. The code to Another Wold will
appear after completing the final puzzle in level 5-A. Press “A, Left,
Right, A” at the title screen to play as the Evil Sorcerer in Another
World.