If Du want to know how to be Luigi I will tell you. First Du finish the game than Du go to to the Profil menu and Du hold L and R as Du open Du Profil and Du will see Luigi. If Du save when Du play as Luigi it won't work so Du have keep on holding L and R everytime Du want to be Luigi and to be Mario just do not hold L and R just do what Du always do just go on. I hope this works for Du because it works for me. THIS IS ONLY FOR NEW SUPER MARIO BROS AND NEW SUPER MARIO BROS 2 NOT ANY OTHER GAME.