Super Mario 3D World/Pipeline Lagoon

The first underwater level in the game.

Before the Checkpoint

When the water rises, swim up to this hidden area for the first green star.

The level begins in a small pool area. Invisible coin-purse enemies are hidden in bushes in the lower-left and upper-right for an easy 20 coins. When you're ready, head through the pipe.

Head right and dive underwater to find a Roulette Block for a random power-up. Head farther right and continue along, dodging Cheep-Cheeps and Porcupuffers. Before taking the exit pipe, swim up to find the first green star. Then take the pipe past a pair of sunken ships and to the checkpoint.

After the Checkpoint

By using the cannon box from the stamp area, you can blast this wall away. Behind it is a treasure room containing the 2nd green star.

This secret area contains the level's stamp. Grab the ? box to the right for a cannon, while you're up there!

A third hidden recess holds a pipe. Through it, the third green star is up the right path and the level exit up the left.

Dive underwater and hit the first ? block for a fire-flower. Swim right and up from there to find a hidden area containing the level stamp and a cannon-block (and an invisible block with a mushroom). Grab the cannon block and head straight down to find a cracked wall. Shoot it and enter the pipe for a treasure room with the second green star.

After exiting the treasure room, head right to find a bunch of Porcupuffers, and swim directly up from the third column of them to find a hidden pipe. Taking this pipe will lead to an area with the last green star and 2 more coin-purses (in the clumps of grass). Furthermore, this route will put you on the upper ledge of the goal area, allowing you to reach the top of the flagpole.