World 4 (Super Mario Bros. 2)

World 4 (known as Chapter 4 in Yume Kōjō: Doki Doki Panic) is the fourth world in Super Mario Bros. 2. The world has a unique snow and ice theme to it, and introduces the player to the Flurry and Autobomb enemies. The boss of this world is Fryguy, who is an intentionally out-of-place boss for this world, being a fire creature in an ice-covered world.