Tropical Refresher, or Sparkling Waters-2, is the second course of Sparkling Waters in New Super Mario Bros. U. It is unlocked via completion of Waterspout Beach, and its own completion unlocks a green Toad House and Giant Skewer Tower.
The level begins on a beach area with some wooded platforms and a Warp Pipe leading underwater. Multiple red Warp Pipes are found, along with a yellow Warp Pipe that can be pushed to cause coins to appear. Mega Cheep Cheeps are found, along with a ? Block. A Blooper is found, along with more Mega Cheep Cheeps. Some moving Warp Pipes are found, with an Urchin in between them. More Mega Cheep Cheeps, a Blooper, and yellow Warp Pipes that can be pushed. A pit with a current leading into it is found, and Mega Urchins, Urchins, Mega Cheep Cheeps, and Cheep Cheeps are in the areas above. Before the Checkpoint Flag, another group of Mega Cheep Cheeps. Another pit with a current is found, surrounded by Warp Pipes and Mega Cheep Cheeps. More Mega Urchins are found, one of which is above a Warp Pipe. The Warp Pipe leads to a ? Block containing a Starman, two Urchins, and a Mega Urchin. A line of Mega Urchins is found in the main area. In an area with an incline, Mega Cheep Cheeps and Bloopers are encountered, with a Spiny Cheep Cheep near the top. A Blooper is found at the top next to a Warp Pipe, which leads above the water and to the Warp Pipe.
The player can skip the underwater sections by using the P-Acorn to fly over the wall at the beginning of the level.
- Star Coin 1: The first Star Coin is found sliding up a red Warp Pipe behind a group of three Cheep Cheeps.
- Star Coin 2: Between two Mega Urchins is a hidden wall with a ? Switch in it. The player should hit it to make the second Star Coin fall near one of the Urchins.
- Star Coin 3: Near the end of the course is a green Warp Pipe beneath a Mega Urchin. Invincible Mario or any form except Super Mario and Small Mario are required to get pass the Mega Urchin within that guards the final Star Coin.