World 4 (New Super Mario Bros. 2)
World 4 is the fourth normal world in New Super Mario Bros. 2. It is a snow-based world, and the levels are made up of snow or ice. The map music is the same one which was used in World 3 of New Super Mario Bros. Wii. This level is unlocked when a player completes World 3-Castle. This is also an optional world as the player can choose to go to World Flower instead.
There are 12 levels and 4 Toad Houses in this world. Of the 12 levels, 8 levels are on the main path, which includes 5 normal levels, a Ghost House, and the Fortress and Castle. Of the remaining four levels, one is the Rainbow level, one is a level requiring payment of Star Coins and the other two are secret levels. Of the 4 Toad Houses, one is red, two are green and one is yellow. The boss of this world is Morton Koopa Jr., who is fought at the castle level.
Levels
- World 4-Rainbow
- World 4-1
- World 4-Ghost House
- World 4-2
- World 4-A
- World 4-Fortress
- World 4-3
- World 4-4
- World 4-C
- World 4-5
- World 4-B
- World 4-Castle
Trivia
- Some levels in this world have a jagged mountainous background that is similar to those found in several levels in Super Mario World.
