World 6-Airship (New Super Mario Bros. Wii)

 is the airship level of World 6 from New Super Mario Bros. Wii. It features Mechakoopas and has the first appearance of Rocky Wrenches and the Mario Car. This is also where the player fights Bowser Jr. for the second time. Other dangers in this level are a series of wheels, which the player needs to jump on to advance. In Bowser Jr.'s fight, the player must climb into their own Mario Car and knock Bowser Jr.'s Junior Clown Car into the electric fence on the walls of the room or jump on him 3 times (only with the Propeller Suit). This is also the 50th level in the game.

Star Coins

 * Star Coin 1: The first Star Coin is blocked by crates on a platform with two Rocky Wrenches. Mario and co. must Ground Pound through the crates to get the coin.
 * Star Coin 2: Shortly after the first Star Coin, there will be several crates surrounding a Green Pipe. Mario and co. must Ground Pound through a crate and into the Pipe to reach an area with several spinning wheels. The second Star Coin is floating between the third and fourth wheels.
 * Star Coin 3: Shortly after the Red Coin Ring, the third Star Coin is in the bottom part of a platform with one Mechakoopa. Mario and co. must Ground Pound through crates to access the Star Coin.

Enemies

 * Mechakoopas
 * Rocky Wrenches
 * Boss: Bowser Jr.