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: This Star Coin is located before the pipe leading underground. There are several ways to getting this Star Coin. The player can leap from a nearby Wiggler, use the POW Block hidden in a secret aclove on the second level in the area with two ? Blocks in the first part, or use a Propeller Suit.
 * Star Coin 2: Just after entering the pipe leading underground, the player is able to see the Star Coin below the platform. The player needs to hop on a Mega Wiggler to reach the Star Coin.
 * Star Coin 3: The Star Coin is located in a secret area after the checkpoint. When the player comes across three Swoopers, the player must jump from a Mega Wiggler to the ledge at the top. Continuing forward will lead the player to the secret area. They need to use the Propeller Blocks in the area to reach the Star Coin.

Enemies

 * Wigglers
 * Big Wigglers
 * Swoopers