Crooked Cavern

Crooked Cavern, or Acorn Plains-2, is the second course of Acorn Plains, and subsequently, the second course of New Super Luigi U. It's unlocked from Waddlewing Warning!, and its own completion unlocks Flame-Gear Tower and the first Toad House.

Star Coins

 * Star Coin 1: At the beginning in a secret area left of the left side Piranha Plant.
 * Star Coin 2:
 * Star Coin 3:

Secret Exit
Right after the third star coin, ground pound the spot where the sign is and follow the signs to the secret exit.

Luigi Sightings
Before the final flagpole, a 8-bit Luigi can be found under some blocks.

Enemies

 * Koopa Troopas
 * Piranha Plants