Super Mario 64 DS Cheats

Unlimited Lives!
You will need 150 Stars for this. When you load your game, hop into the cannon outside the castle. Blast to the top of the castle and you will see 3 lives. Get the 3 lives and enter the castle. Then go into the 3-Star door with the ship picture inside it. Jump into the secret spot that will give you an extra live. Then go outside the castle and hop into the cannon again. Then blast to the top again and you will see the 3 lives again. Get the 3 lives and go back in the castle. Then go through that 3-Star door again and get that secret live again. Now you can keep repeating this until you get 100 Lives!