For the right switch, see Star Coin 1 below. The switch on the left activates blue platforms which appear set by set and also makes the door to the next area appear. Left Door: This door leads to a room with a lone Boo and two ? Switches at the two ends of the room.The two Boos in the room will then turn gold and begin to move away from Mario while producing coins. There is a Gold Ring above Mario's starting position which can be obtained by using Raccoon Mario to fly to the top platform with the Gold Ring.
There are two elevated doors, one on the left and another on the right which leads to different areas. Hop down to snaffle the final Star Coin.Mario begins in the basement of the level, where two moving ? Blocks can be found, the left one containing a Super Leaf. If you're Fire Mario then the Super Piranha Plant won't be a problem, otherwise, you can jump on the red Koopa Troopa and throw his shell into the plant to destroy it. Hit it, then jump onto it and enter the pipe to the left. On the left side, under the pipe, there is a hidden block. Just before the goal, you'll see four pipes with Piranha Plants coming out of them. When it does, walk across and grab the Star Coin. You might think the coin is now inaccessible, but you simply need to wait for the first gate to close. Wait for the Piranha Plant to retreat back into his pipe, and drop down. Fall down through the first gate and move to the left to open the second one. After you've emerged from the second, climb up and you'll see a Super Piranha Plant to your left. Jump over it and continue until you see a coin roulette box. The second Star Coin isn't until much later in the level, after you've been boosted upwards through two pipes. Soon you'll come to an open room with a red Koopa Troopa. Ground-pound the blocks above it and fall through. Early in the level you'll see a yellow gate with an arrow pointing downwards.