The Bowser Express

The Bowser Express, or , is the fourth level in World Bowser in Super Mario 3D World. This level is a train-style level that is modeled after Bowser. At the end of the level, the player must battle Pom Pom for the second time. This level features various enemies and obstacles, such as Spike Bars that swing back and forth.

The Bowser Express's background is reused in Super Mario Maker 2, in the airship theme of the Super Mario 3D World style.

Layout
The level starts on a platform near a train with some Skipsqueaks nearby. The player needs to hop on the train and avoid a nearby Spike Bar in order to reach an area infested with Conkdors and Bullies. A pool of water comes soon after that where the player must navigate past some Madpoles in order to get back on the train. The player must now avoid a Spike Bar and enter a room filled with Mini Goombas. A Hammer Bro guards the nearby pipe which brings the player to Pom Pom. After defeating her, a Warp Box brings the player to the area with the Goal Pole.

Green Stars

 * Green Star 1: On top of the train at the start of the level.
 * Green Star 2: The player needs to collect all eight Green Coins from the Green Ring before they disappear.
 * Green Star 3: In a passageway with a Fire Bro.

Stamp

 * The player needs to Ground Pound the second ? Block in the room with Mini Goombas; it is a Platform Block that extends to the room's roof, where the stamp is.

Enemies

 * Skipsqueaks
 * Goomba Towers
 * Conkdors
 * Bullies
 * Madpoles
 * Horned Ant Troopers
 * Mini Goombas
 * Goombas
 * Hammer Bros.
 * Fire Bros.
 * Pom Pom (boss)