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