World 4 (Super Mario World 2: Yoshi's Island)

World 4 is the fourth world of the game Super Mario World 2: Yoshi's Island and Yoshi's Island: Super Mario Advance 3. It consists of ten levels, and it has six regular levels, a fort, a castle, and the Match Cards Bonus Challenge. Its Extra Stage is Extra 4: The Impossible? Maze, and its Secret Stage is Secret 4: Fight Toadies w/ Toadies. The world's theme is an arid, mountainous area with sand, sand dunes, and scattered trees visible.

List of levels
The following is a list of each level in World 4.

Profile
Player's Guide description: ''Red sky at morning, Yoshies take warning! Things got a lot hotter for the plucky babysitter as he explores the lurid landscape of World 4. When Yoshi meets a friendly face, it belongs to Marching Milde, who would love to stomp him into the ground! Koopas and Para-Koopas patrol the terrain, but they're just a warmup for the final showstopper. To get out of this world, Yoshi will have to defeat Hookbill, the biggest and baddest Koopa of them all!''