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