How do you get waluigi in Mario 64 ds?

Many Rumors----But there may be a way

1.Beet Koopa the Quick within 30 seconds

2.Find a Purple Switch(In the Princess Peach Picture in the locked door)

3.Fight Rabbit King(or Dark Koopa King)

4.Put the backwards "L" key in the white door

5.Have fun being Waluigi!