World - Super Mario Wiki, the Mario encyclopedia

A world is a group of levels in Super Mario games. In Super Mario Bros. and Super Mario Bros.: The Lost Levels, each world always has exactly four levels, and in Super Mario Bros. 2, each world has three. However, starting in Super Mario Bros. 3, most games

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Super Mario Encyclopedia: The Official Guide to the First 30 Years - Kindle edition by Nintendo. Arts & Photography Kindle eBooks @ .

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