Super Mario 64/Bowser in the Sky

To get into this stage, a player requires 70 stars and needs to have beaten Bowser in the Fire Sea.

Red Coin Route
Most red coins can be discovered throughout the way to the top. Some could be overlooked, such as the first one, which can be reached by jumping on the red-edged box near the beginning. The last coin is located beneath the stairs near the warp pipe to the final battle, making it the most difficult to find for first-time players.

Defeating Bowser
Get behind Bowser and grab his tail. Spin him slowly around by rotating the analog stick 360 degrees. Then toss him a little way and run up behind him and grab him again. Repeat throwing Bowser until you get close to a mine, and let him have it. The rings he stomps out are easy to jump over the closer you stand to Bowser, but long jumping towards Bowser right before the rings damage you will work. After you throw him into a spike twice, Bowser will break the platform into a star. Stand in the middle when he is doing this. There is a 1-up right before you enter to battle Bowser. It is right behind one of the pillars where the wind blows. Good Luck!!