World 5-2 (New Super Mario Bros. Wii)

World 5-2 is the second level in World 5 in New Super Mario Bros. Wii. It starts off with a number of Wigglers. The player will then progress through a green warp pipe into an underground area filled with Mega Wigglers, Swoopers, and toxic purple liquid.

Star Coins

 * Star Coin 1: The first Star Coin is not far from the start of the level, floating high above a Wiggler on a platform. Mario and co. can either jump to the Star Coin from the Wiggler, or use the POW Block in the hidden area in the wall to make the Star Coin fall to the ground.
 * Star Coin 2: The second Star Coin is in the beginning of the second area, floating over the Poison Water. Mario and co. must wait for a Big Wiggler to get in the Poison Water, then use it to jump up to the Star Coin.
 * Star Coin 3: On top of the rock ceiling with the third, fourth and fifth Swoopers is a secret area, which Mario and co. must jump to using Big Wigglers. Once there, Mario and co. will arrive at an area with two Propeller Blocks, several Coins, and the third Star Coin, floating high-up in the air. Mario and co. should use one of the Propeller Blocks to fly up to it.

Enemies

 * Wigglers
 * Big Wigglers
 * Swoopers