New Super Luigi U: Sparkling Waters- Castle -- Larry's Trigger-Happy Castle

As the name suggests, you're going to be dodging some bullets in this castle. There are Bullet Bills and Banzai Bills in the air and Torpedo Teds in the water. The Ice Flower is available here. The first Star Coin is high in the arch of coins over the water between two Bill Blasters. Take the pipe near the brick wall down underwater. Here you'll find homing Torpedo Teds. Hit the block between two item blocks to make a P-Switch appear. Lure the Torpedo Teds into break the brick blocks around it and hit the switch. This will turn the brick blocks into coins so you can get the second Star Coin in the coins in the middle, near the floor. Alternatively, you can lure the Torpedo Teds into breaking the brick blocks surrounding the Star Coin. On the right side is a pipe and an 8-bit Luigi. Take the pipe to the main level. There is an item block to the left next to the wall of brick blocks. Get the powerup quickly if you need it, as a Banzai Bill will break through the wall very soon. Jump on the brick blocks to the right and keep going. Jump from the brick blocks to reach the third Star Coin before the Banzai Bill destroys the blocks. Keep going to the right to the boss door. Water pillars will appear in Larry's Airship, making stomping him and dodging his attacks a little more difficult. Stomp him three times to win. This opens the path to the Airship in the Soda Jungle. We now have all of the Star Coins in Sparkling Waters.