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