World 4 (New Super Mario Bros. Wii) - Super Mario Wiki, the Mario encyclopedia

World 4 is the fourth world in New Super Mario Bros. Wii. It features several tropical islands, therefore, most of its levels are water-themed and make rather good use of the Penguin Suit, which can glide over water and allow Mario to swim better. Also, on the map is a

World 9 (New Super Mario Bros. Wii) - Super Mario Wiki, the Mario encyclopedia

World 1 (New Super Mario Bros. Wii) - Super Mario Wiki, the Mario encyclopedia

World 6 (New Super Mario Bros. Wii) - Super Mario Wiki, the Mario encyclopedia

World 4-Airship (New Super Mario Bros. Wii) - Super Mario Wiki, the Mario encyclopedia

World 4-4 - New Super Mario Wii Guide - IGN

World 4-4 - New Super Mario Wii Guide - IGN

World 3-4 (New Super Mario Bros. Wii) - Super Mario Wiki, the Mario encyclopedia

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World 4-Tower (New Super Mario Bros. Wii) - Super Mario Wiki, the Mario encyclopedia

World 1-6 (New Super Mario Bros. Wii) - Super Mario Wiki, the Mario encyclopedia

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Mario - Wikipedia

World 5-4 (New Super Mario Bros. Wii) - Super Mario Wiki, the Mario encyclopedia