If you did not unlock him yet you can't get these lives. Just jump in the water,go under and come up it will fill all the way up.

When you past the line a star should appear, take it and you got a secret star. (you crouch while running then push attack before you go down). When you start the slide, go down it using the sliding kick move. In the main menu touch the character then touch the hand that is pointing. Go to the Wario picture where the guy is wearing yellow, go into the pic! Go to the top floor with Luigi and go to the mirror room. You'll see a Luigi pic, go into it to beat the level and get Luigi! Get the ! box and get to the top (you have to have Mario) and press R to land. Go up the stairs after getting the star, go to the right then go to the other right door after turning right. Its a level so you do the first level then there are stairs. Go out the door then go through the doors again and you'll see a big Boo on either side. You and a star will appear and then you get the star. If you see smaller ones you get the red coins. Go into the door that the boo went in and you'll either see a big Boo or just see smaller ones. Go to the courtyard and you'll see a Boo (ghost). Go to the room with the #8 on it and there will be a Mario pic, go into the pic and beat the level and you have Mario. Go to the game room, to get Mario you have to have 8 stars. Then there is a door without it just in front of you. You have Yoshi and you go were all the doors with letters on them L (Luigi), M(Mario) & W (Wario).

Super mario 64 ds cheat