World 6 (Super Mario Bros. 2)

World 6 (known as Chapter 6 in Yume Kōjō: Doki Doki Panic) is the sixth world in Super Mario Bros. 2. World 6 is a desert themed stage much like World 2, but it is harder. In the original game, the boss at the end was Tryclyde, who made his appearance again from World 2, but in the Game Boy Advance remake, Super Mario Advance, he was replaced by Mouser, who is also the boss of World 1. Worlds 6-1 and 6-2 feature Green Birdo, while World 6-3 has Red Birdo before Mouser or Tryclyde.