World 6 (New Super Mario Bros. Wii)

World 6 of New Super Mario Bros. Wii is a mountainous area featuring many cliffs and rock structures. There are eight levels in this world, two of them being castle levels that are guarded by Morton Koopa Jr.. Various Mushroom Houses are also found around here, giving the player items such as Starmen, Mushrooms, and Propeller Mushrooms. On the map, there are Bullet Bill Blasters which continuously fire Bullet Bills. Mario and the gang can get attacked by them and be forced to play in the Enemy Course.

Enemy Course

 * Infinite Bullet Bills