More:Super Mario 64 DS: Ship

From GameWinners

Contents 1 Secret area 2 Tricky triangles star

Secret area

Got to the room on the first floor with the entrance to the level with the sunken ship picture. There are small square holes on the walls. Jump in the one on the left to get a 1-Up. Jump into the one on the right to enter the Castle Secret. To earn a Star you must swim through the tank and get all eight red coins. To get air, you must grab the other coins -- their is no way to get out of the water.
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Tricky triangles star

Go to the top of the Rainbow Ship as Luigi. Press R then B to do the spinning punch. When you do that, Luigi will do something like a glide. Go towards the tricky triangles star and land.