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 9 (Super Mario Bros.: The Lost Levels) - Super Mario Wiki, the Mario encyclopedia

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

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

World 1-1 (Super Mario Bros. 2) - Super Mario Wiki, the Mario encyclopedia

Super Mario Advance 4: Super Mario Bros. 3 - Super Mario Wiki, the Mario encyclopedia

World 4-6 (New Super Mario Bros.), MarioWiki

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

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

Piranha Plant, MarioWiki

World 4-1 (Super Mario Bros. 2) - Super Mario Wiki, the Mario encyclopedia

World 8-3 (New Super Mario Bros.), MarioWiki

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

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

Princess Daisy - Super Mario Wiki, the Mario encyclopedia

World 1-4 (Super Mario Bros. 3) - Super Mario Wiki, the Mario encyclopedia