New Super Mario Bros. (Nintendo DS) Cheats & Tips
Cheats, codes, tips, hacks, how to's, and walkthroughsCHEAT CODES | Play as Luigi (Single Player Mode)
While at the Select A File screen, hold L and R and choose a saved game file.
CHEAT CODES | Secret Challenge Mode
Pause the game to get to the Map, and press L, R, L, R, X, X, Y, Y.