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.

Enemies Introduced

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