Piranhas in the Dark, or Layer-Cake Desert-3, is the third course of Layer-Cake Desert in New Super Luigi U. It is unlocked by completing Spike's Tumbling Desert, and its own completion unlocks Wind-Up Tower.


The level starts in a desert setting with a Warp Pipe that takes the player to the underground portion of the level. There is a Hidden Block containing a Starman above the Warp Pipe. The underground section is dim, with spotlights lighting portions of the area. The area begins with a section of tilting platforms on tracks, as Big Piranha Plants on Warp Pipes. A Big Piranha Plant is found on one of the tilting platforms, and is followed by a section of the ground with a ? Block containing a Glowing Baby Yoshi. A section of tilting platforms on diagonal tracks follows, with Fire Bros. on some of them. After the Fire Bros., Big Venus Fire Traps are found on Warp Pipes. A Warp Pipe is found at the end of the area, which leads above ground to the area with the Goal Pole.

Star Coins

  • Star Coin 1: Jump over the first Piranha Plant while getting the Star Coin from above.
  • Star Coin 2: Use the fire form to throw fireballs the fourth Piranha Plant and wait for the platform to lower to the Star Coin.
  • Star Coin 3: Use the fire form to throw fireballs on the eight Piranha Plant and go into the pipe the plant was originally planted on. After exiting from the other side, jump up to get the final Star Coin.

Hidden Luigi image

Use the Fire form to destroy the Piranha Plant leading to the third Star Coin and see a mini picture of standard Luigi from Super Mario Bros. jumping.