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 8 (New Super Mario Bros.), MarioWiki

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

Lemmy Koopa, MarioWiki

World 4-1 (New Super Mario Bros. Wii), MarioWiki

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

World 8-Tower 2 (New Super Mario Bros.), MarioWiki

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

Super Mario 3D World, Nintendo

World 4-Fortress 1 - Super Mario Wiki, the Mario encyclopedia

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

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