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

 is the first Airship level in New Super Mario Bros. Wii.

Layout
The main enemies in this level are the Mechakoopas and the Rocket Engines. Near the end, there are Cannons and pipes that release Bob-ombs. The flames from the Rocket Engines can make them explode. The boss of the airship is Bowser Jr. in his Junior Clown Car. The player(s) must propel up with Propeller Blocks, or a Propeller Suit if a player is lucky enough to have one, and stomp on his head three times. After Bowser Jr. is defeated, Kamek will fly up with Bowser Jr. They will then eject Mario and gang from the Airship, which will fly away, forcing Mario to chase it to World 5.

Star Coins

 * Star Coin 1: The first Star Coin is in a small alcove in the ground, next to the first long Rocket Engine. Mario and co. should wait for the Rocket Engine to turn to the left, then go for the Star Coin.
 * Star Coin 2: Shortly after the Checkpoint Flag is a Green Pipe covered by Crates. Mario and co. must Ground Pound through a Crate and into the Pipe to be taken to an area with two screw rides. The second Star Coin is floating over the second one.
 * Star Coin 3: The third Star Coin is to the bottom-left of the Yellow Pipe leading to Bowser Jr., blocked off by a Crate. Mario and co. must destroy the Crate with a Bob-omb to make the Star Coin accessible.

Enemies

 * Mechakoopas
 * Rocket Engines
 * Bob-ombs
 * Boss: Bowser Jr.