More:Super Mario 64 DS: Wet Dry World

From GameWinners

Contents 1 Flood 2 No water 3 Express elevator star

Flood

After getting the key from the second Bowser, go upstairs and walk through the door that leads to the room with all the pictures. Stop when you get through it and look around. In front of you is a picture of a spider. It is Wet Dry World. To flood it, jump very high into the picture. If you time the triple jump extremely well, you will flood Wet Dry World.

No water

This trick is very similar to the "Wet Dry World: Flood" hint. The only difference is, instead of jumping high into the picture, jump very low into it. You should try to jump directly into the bottom of the picture.
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Express elevator star

To get this star, turn invisible as Luigi and you will go through the cage.