World 3 (New Super Mario Bros. Wii)

World 3 is an ice-themed world conquered by Lemmy Koopa in New Super Mario Bros. Wii. The Penguin Suit is introduced in this world. This is also the first and only world in the game that has a switch that can change the obstacles slightly in levels, similar to Switch Palaces. On the map is an area with ice that has two Ice Bros. on it. If Mario and co. are hit by them, they will endure a battle game where they will have to complete the Enemy Course.

Enemy Course

 * Two Ice Bros.
 * Three Ice Bros.
 * Four Ice Bros.

The Ice Bros. will throw ice balls that will freeze and damage Mario and crew. To quickly escape an ice entrapment, the player should jump on them or try to hit them from below.

Enemies Introduced

 * Cooligans
 * Bullet Bills
 * Bill Blasters
 * Boos
 * Big Boos
 * Amps
 * Ice Bros.
 * Bob-ombs
 * Ghost Vases
 * Spiked Balls
 * Ball 'n' Chain