Super Mario 64 on N64 - The Second Bowser World - Bowser in the Fire Sea

The second Bowser world is located at the bottom of the staircase leading to the basement, right after the locked door (key in the first Bowser world). You need to pass through the big star door and then find the first star of Course 9 (Dire, Dire Docks). You need 30 stars to pass the door. To finish Bowser's level, you just follow the path. Falling into the holes won't be deadly, but you'll need to quickly steer Mario back to solid ground when his butt catches fire. This page will just tell you where to find the 8 red coins that make the star appear right next to the pipe leading to Bowser.

1. After meeting the first Bully, take the mesh path to reach the first red coin.
2. Shortly after the first Bully, on the platforms that tilt when Mario walks on them.
3. After climbing up the green pole, in a corner of the cage.

4. Under the cage elevator. Get on it and get off before it starts. The coin is right below; you have to jump into the void to grab it.
5. Take the elevator and take the ramp a bit further on your right; the coin is right above a Bully.
6. A bit further along the "unfolding" ramp.

7. On the left in front of a flamethrower, enter the passage where the lava rises and falls.
8. Right above the last pole that rises and falls over the lava.

From the last pole, do a handstand to end up at the very top of the structure and go get the star. You can also run (or walk) on the little low wall.

After taking the star, turn around to enter the giant funnel (watch out for the bridge that collapses just before). Bowser is fought like the first one. You need to try to get behind him to grab his tail (B button), then spin Mario and release Bowser toward a bomb. Bowser's only additional attack is a big jump that makes the platform tilt when he lands. He can also teleport. Once defeated, Bowser will leave behind a key.