World 6 (Super Mario Bros. 2)

World 6 is the sixth world in the game Super Mario Brothers 2, which itself is a remake of the japanese Doki Doki Panic. The last world before the grand finale in World 7 (SMB2), World 6 is a desert themed stage much like World 2 (SMB2). In the original game, the boss at the end was Tryclyde, recycled from World 2, but in the Gameboy Advance remake, Super Mario Advance, he was replaced by Mouser, who is also the boss of World 1 (SMB2) and was in the original also the boss of World 3 (SMB2), but in this remake was replaced from that position by a new boss, Robirdo. Levels 6-1 and 6-2 feature Birdo's green form at the end, while 6-3 has red Birdo before Mouser/Tryclyde.