Super Mario 64/Bob-omb Battlefield

Bob-omb Battlefield is course 1 of Super Mario 64 DS. To access it, enter the castle, enter the door on the right with no number on the star, and jump inside the painting. No stars are required to access it; it is the first level.

Star 1: Big Bob-Omb on the Summit
To reach the star shown on the map, you will have to climb the mountain. Start by going up the bridge, then take a sharp turn left. Go past the Chain Chomp, then cross another bridge, then go right. Run up the grassy incline, then walk countercockwise around the mountain until you get up to the summit. Here you will meet the Big Bob-Omb. He will throw Bob-Ombs at you, so eat them, then spit them out (or make an egg and shoot it at him. Do it three times to get you the star.

Star 2: Footrace with Koopa the Quick
Koopa the Quick is found near the first bridge. He is looking for Mario. If you are any other character, you will need to find a Mario cap. Go to wherever it is on the map. A Goomba will be wearing it, so grab it (by killing the Goomba). When you have transformed, go back to Koopa the Quick to start the race. (The flag is where you defeated the Big Bob-Omb.) If you get there before he does, you will get a star as a reward.