More:Super Mario 64 DS: Tall, Tall, Mountain

From GameWinners

Contents 1 Easy lives 2 Owl 3 Mysterious mountainside 4 Slide

Easy lives

Go to the tree behind you at the start of the level. Climb it and you should see an owl come out of it. Talk to it, then go to the top of the level. There should be a gray cliff with coins. Jump into the wall (secret slide). At first there should be a walkway. Go through, but turn to the right and get that extra life. Then, go down and get the other two extra lives down the slide.
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Owl

When you enter the level,turn and you will see a tree. Climb up the tree and jump off to awaken an owl.

Mysterious mountainside

Go to the top of the mountain and get the Wario hat. Jump down until you see a group of coins on the side of the mountain. Jump through the wall to enter a secret slide game, in which the reward is a Star.

Slide

Go to the bridge at the top of the mountain. Go underneath. There should be a cloud that is trying to blow you down. Follow the coins. At the end of the slide, you should end up in a cage. There should be a Star here.