World 6 (Super Mario World 2: Yoshi's Island)

World 6 (also known as the Koopa Kingdom) is the sixth and final world of the game Super Mario World 2: Yoshi's Island and its re-release Yoshi's Island: Super Mario Advance 3, resembling the landscape and environment of Yoshi's Island. The world contains eight normal levels. Its mini-boss is Tap-Tap the Red Nose; the main and final boss is Baby Bowser. This world includes many dangerous obstacles, including lava and spikes, the world's theme is a barren landscape in sunset/starry night sky. Its extra level is Extra 6: Ultimate Castle Challenge, its secret level is Secret 6: Endless World of Yoshis, and its bonus level is Bonus 6: Slot Machine.

List of levels

 * 1) Scary Skeleton Goonies!
 * 2) The Cave Of The Bandits
 * 3) Beware The Spinning Logs
 * 4) Tap-Tap The Red Nose's Fort
 * 5) The Very Loooooong Cave
 * 6) The Deep, Underground Maze
 * 7) KEEP MOVING!!!!
 * 8) King Bowser's Castle
 * 9) Ultimate Castle Challenge (known as Castles - Masterpiece Set in Super Mario World 2: Yoshi's Island)
 * 10) Endless World of Yoshis (known as Crazy Maze Days in PAL versions of the game)