World 4-Tower (New Super Mario Bros. Wii)

 is the Tower level of World 4 of New Super Mario Bros. Wii.

Layout
This tower features conveyor belts. Metallic blocks are also a common sight here; some must be jumped on to advance, while others are an obstacle. These blocks may also crush players. Wendy O. Koopa is fought here, at the end. Wendy will attack Mario and co. by shooting rings that bounce off the walls (they eventually dissolve) out of her wand and jump. She'll spin around in her shell attempting to hit the player(s) when hit. After being hit the third time, Wendy will be defeated.

Star Coins

 * Star Coin 1: The first Star Coin is at the start of the second area, floating high-up. Mario and co. should get on top of an incoming metal block and jump from it to reach the Star Coin.
 * Star Coin 2: Directly below the Checkpoint Flag is a hidden area that conceals the second Star Coin. It can be reached with the conveyor belts.
 * Star Coin 3: When entering the area with Wendy's door, the third Star Coin is floating to the high-left. To get it, Mario and co. must jump onto every box as it falls down, working up to the Star Coin. Once the second-to-last one falls, Mario and co. should hurry and grab the Star Coin before the last metal box falls.

Secret Exit

 * In the last room, there are many metal blocks which are about to drop. Dash for the left wall, leaping over the gap, as quickly as possible before getting crushed by the blocks, and jump into a hidden alcove in the wall with a Warp Pipe. The pipe leads to the castle's rooftop which contains the secret flagpole. This exit takes the player to the Warp Cannon, which takes the player to World 6.

Enemies

 * Dry Bones
 * Boss: Wendy O. Koopa