World 2 (New Super Mario Bros. Wii) - Super Mario Wiki, the Mario encyclopedia

World 2 is the second world in New Super Mario Bros. Wii. This world takes place in a desert. There are eight levels in this world, two of them being castle levels that are guarded by Roy Koopa. It also has a total of ten exits. Various Toad Houses

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

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Walkthrough - New Super Mario Wii Guide - IGN

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New Super Mario Bros. Wii - Super Mario Wiki, the Mario encyclopedia

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New Super Mario Bros. Wii, MarioWiki

New Super Mario Bros. Wii - Super Mario Wiki, the Mario encyclopedia