How do I complete the level:mario's wings to the sky ?

Be Mario, then head to the ? box near the sign. Get into the cannon and blast yourself to the floating island. Then, on the island, get the ? box. Get into the cannon there, and look at the floating coins near you. Collect all 5 of the coins in the middle of the circles. If a series of numbers from 1-5 shows up, you got the coins. Once you see a 5, you got all the coins. I forget where the star appears though.

First, you must become Mario. To do that you have to go into the room on the far upstairs right, you need one star to enter it. It is the only room with a white border around the door. Follow the red carpet then go off to the left to the door with a giant "M" on it. Then, go to the middle of the room and stand on the sun. Push the "X" button on your DS or DSi. You will then look up into the sun in the painting on the ceiling. You will go into a secret world and once you have done that, immediately press the up button. You will then see a giant red button with a "?" on it. Step on it and the "?" blocks will be enabled. Next, exit the course and go to the world with "Mario Wings the Sky" in it. Enter the level, talk to the pink bomb-bombs to activate the cannons, and head to the mountain. On the way, there will be a little wooden plank right after a fake cannon. Walk across the plank or jump the long hole in the ground. You can choose. Once that is done, get into the cannon and launch yourself to the floating isle. you will want to aim about half an inch above the tree to make it there. You should land in the tree and then jump off of it. You will see a red ""?" block. Jump so that you hit that and then jump to get the wing. Then go into the cannon that is on the other side of the tree. Once you get into the cannon, you will see a bunch of circles of coins, inside each ring is a special coin that looks like every other coin. You have to get all of the middle coins by flying through the air. Once you get all five, the star will appear on the map.

--Hope this helps!

you go up to the float islang and get the wings. go into the rock and shoot yourself. collect all of the coins in the middle, you need 5 and you've done it.