World 2 (Super Mario Bros.)

World 2 is the second world found in Super Mario Bros. The difficulty for this world is slightly higher than that of World 1. This is the first world to introduce an underwater level, as well as a seaside level.

Enemies introduced

 * Cheep Cheep
 * Blooper
 * Lava Bubble

Trivia

 * World 5-4 is the same as World 2-4, but with more Fire Bars and Lava Bubbles added. Likewise, Worlds 7-2 and 7-3 are the same as Worlds 2-2 and 2-3, but with more Bloopers and Koopa Troopas & Paratroopas added, respectively.

Welt 2 (Super Mario Bros.) Mondo 2 (Super Mario Bros.)