New Super Mario Bros. Wii 9-8 -- Bouncy Clouds

This is an automatic sidescroller made difficult by the fact that the ground is made out of bouncy clouds. You get the Propeller Suit here, which makes things a little easier. I used it to get the 1st Star Coin in the higher of two rings of Fuzzies. There are flying item blocks nearby. At least one of them contains a 1-up. In the center of a nearby ring are brick blocks. It is best to activate the P-switch in front of them and turn them into coins, so it will be easier to dodge the incoming Fuzzies. The 2nd Star Coin is easy to find and miss. It's traveling along the ring with some Fuzzies, so I timed my jump to get it. You make take some damage here. Nearby are giant Fuzzies to dodge while getting to the other side of a wall. Soon after are high up blocks. Stand on them, because you will soon see coins in the formation of a Banzai Bill. One will come through heading in the same direction that the coins are pointing. They will destroy the gray blocks surrounding the coins, but not the Goombas. The 3rd Star Coin is in the last coin formation surrounded by gray blocks. Stand on the bricks to avoid the two Banzai Bills that will be coming through at the same time. After that is the goal. This took me 10 tries.