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
World 3 - New Super Mario Bros. Wii - Koji Kondo Sheet music for Piano, Strings group, Percussion bells (Mixed Trio) | Musescore.com
![New Super Mario Bros Wii - Co-Op - Part 5 World 3-4, 3-5, 3-Boss | Super mario bros, Super mario, Mario New Super Mario Bros Wii - Co-Op - Part 5 World 3-4, 3-5, 3-Boss | Super mario bros, Super mario, Mario](https://i.pinimg.com/originals/a0/f0/1f/a0f01f6655de05f41159c0fbcb78f9df.jpg)