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 Super Mario Advance 3: Yoshi's Island. It consists of 10 levels (including the Bonus Game for the SNES version), and it has 6 regular Levels, a Fort, a Castle, a Extra Level, the Match Cards Bonus Game (SNES Only), and a Secret Level (GBA Only).

List of Levels in World 4
Here are all the levels in World 4: