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
Super Mario Advance 4: Super Mario Bros. 3 World 4-Fortress 1 Map Map for Game Boy Advance by Eevee-Trainer - GameFAQs
![New Super Mario Bros Wii - Part 8 - World 5-2, 5-4, 5-5, 5-Castle | Super mario, Super mario bros, Mario bros New Super Mario Bros Wii - Part 8 - World 5-2, 5-4, 5-5, 5-Castle | Super mario, Super mario bros, Mario bros](https://i.pinimg.com/originals/94/ff/6f/94ff6f60d82c3827731ad59acf7aea96.jpg)