World 3 is an ice world while World 4 is a water world in New Super Mario Bros Wii. In New Super Mario Bros U, why is World 3 the water world
![New Super Mario Bros. Wii (Nintendo Wii, 2009) Video Game - Tested and it Works | Super mario bros, Mario bros, Wii New Super Mario Bros. Wii (Nintendo Wii, 2009) Video Game - Tested and it Works | Super mario bros, Mario bros, Wii](https://i.pinimg.com/originals/52/c1/81/52c181dbe5931389c94cf60ede4ae33a.jpg)
New Super Mario Bros. Wii (Nintendo Wii, 2009) Video Game - Tested and it Works | Super mario bros, Mario bros, Wii
![This is a map of the item houses on New Super Mario Bros. Wii! First flip over the squares in green to determine which va… | Super mario bros, Mario wii, Mario This is a map of the item houses on New Super Mario Bros. Wii! First flip over the squares in green to determine which va… | Super mario bros, Mario wii, Mario](https://i.pinimg.com/originals/09/27/a4/0927a48572ea1a8378785a418f99ffca.png)