Special 4 is the twelfth world and the fourth special world in Super Mario 3D Land. The world is in a dark green forest at night with yellow mushrooms. Special 4 contains six levels, including the airship, and one Toad House. Boom Boom and Pom Pom are the bosses fought at the end of the world.
An original level consisting of various individual airships from the previous airship levels including a section from World 6-Airship. The bosses are Boom Boom and Pom Pom, who are fought sequentially. Requires 160 Star Medals to be unlocked.