New Super Luigi U: Meringue Clouds-2 -- Wiggler Rodeo

This level is filled with Nippers. To go over them, bounce off of the Wigglers walking around. Past the first patch of solid land is a Chomp. To the left of it is the first Star Coin behind brick blocks. Pound the Chomp's stake when it's facing to the left so it will break the bricks for you. In that area are more brick blocks, along with 8-bit Luigi. One of them has a Starman. Get it so you can run over the Nippers. You'll need it to get the first Star Coin, which is under a nearby mushroom, and the third one, which is farther ahead. Ignore the Red Coins so you can get both Star Coin. Keep going and you'll reach the flagpole.