Frosted Glacier

Frosted Glacier is the snowy and fourth world in New Super Mario Bros. U, lying northeast of Layer Cake Desert, Sparkling Waters, and Acorn Plains, north of Soda Jungle, northwest of Rock-Candy Mines and Meringue Clouds, and west of Peach's Castle. Frosted Glacier is a cold and snowy world with pine trees and indigo mountains that takes place during a constellation filled night. It's one of two of the worlds that the player can choose from after beating Morton in Morton’s Compactor Castle, the other being Sparkling Waters. Because of this, it is quite possible to play through the game without ever reaching Frosted Glacier. There are 9 levels in this world, five of them are the regular levels, two are the Tower and Castle levels, one Ghost House, and one secret level. The name is derived from frosting, or a reference to the original meaning, which is to be covered and coated in frost. The boss of this world is Wendy O. Koopa. The Bubble Baby Yoshi is making an appearance in the first level of this world. There are Cooligan Enemy Courses.

Levels

 * Frosted Glacier-1: Spinning Star Sky: Includes giant stars that spin when the player steps on it.
 * Frosted Glacier-2: Cooligan Fields: It introduces Cooligans.
 * Frosted Glacier-Fort Icon.png: Freezing Rain Tower: The tower level of Frosted Glacier.
 * Frosted Glacier-3: Prickly Goombas!: The third level of Frosted Glacier. It features Goombas in chestnuts. This is the second time for them to be found in chestnuts since world 9-7 of New Super Mario Bros. Wii
 * Frosted Glacier-4: Scaling the Mountainside: The fourth level of Frosted Glacier.
 * Frosted Glacier-5: Icicle Caverns: The fifth level of Frosted Glacier.
 * : Swaying Ghost House: The Ghost House of Frosted Glacier.
 * : Wendy's Shifting Castle: The Castle level of Frosted Glacier with moving girders, Thwomps, Thwimps and Super Thwomps.
 * Frosted Glacier-Fliprus: Fliprus Lake: A secret course introducing Flipruses. This is also the only course with Flipruses.

Challenge Mode original courses

 * Penguin Bowling

Boost Rush Courses

 * Spinning Star Sky – Flying Squirrel Pack
 * Wendy's Shifting Castle – Acrobat Pack
 * Fliprus Lake – Penguin Pack
 * Cooligan Fields – Penguin Pack