How do you unlock luiga on super Mario 64 ds?

Answer 1

Go into Boo's Mansion,go to the room with a tipping floor,stand on the ? block,backflip in the direction of the door,go into the door and you will see a picture of Luigi(the picture in the mirror room is FAKE!!!!!)You will have to follow the sound of King Boo's maniecal laugh.Once you make it,drop into the hole on the top and go up to the mirror and walk around it for a few.Then you will see an illusion image of Luigi and King Boo will appear.He doesn't do a lot of attacks,but he will try to trick you by becoming invisible to the mirror and actual world.Just watch where he and you are(another illusion is that when you see Luigi in the mirror,it actually marks where you are.)When you get the key just go to where you get Mario and BAM!!!!!You get the Man in Green!