World 4-1 (Super Mario Bros.) - Super Mario Wiki, the Mario encyclopedia

World 4-1 is the first level of World 4 in Super Mario Bros. and the thirteenth level overall in said game. This level introduces the Lakitu and Spiny enemies in the series.

World 5-2 (Super Mario Bros.) - Super Mario Wiki, the Mario encyclopedia

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

Super Mario Bros., MarioWiki

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

World 8-1 (Super Mario Bros.) - Super Mario Wiki, the Mario encyclopedia

World 4-3 (Super Mario Bros. 2) - Super Mario Wiki, the Mario encyclopedia

World 1-Fortress - Super Mario Wiki, the Mario encyclopedia

New Super Mario Bros., Nintendo

Super Mario Bros., MarioWiki

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

World 8 (New Super Mario Bros. Wii) - Super Mario Wiki, the Mario encyclopedia