The Bullet Bill Express

The Bullet Bill Express, or, is the third castle level of Super Mario 3D World and the eighth course in World 3. It is unlocked via completing Switchboard Falls, and its own completion frees the Blue Sprixie Princess who builds a Clear Pipe to A Banquet with Hisstocrat. This level autoscrolls.

Green Stars

 * Green Star 1: Seen at the very beginning, the first green star is on the edge of the caboose.
 * Green Star 2: The second green star is held captive by a Goomba Tower.
 * Green Star 3: There's a Warp Pipe on a flatbed railcar that takes the player to the other train where Captain Toad is trapped inside a crate. When freed, Captain Toad will reward the player the green star.

Stamp

 * It is guarded by a Fire Bro. inside the train.

Enemies

 * Bullet Bills
 * Flopters
 * Cat Bullet Bills
 * Cat Banzai Bills
 * Goomba Towers
 * Fire Bros.