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

World 2 is the second 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 like every other world, it has 6 regular Levels, A Fort, A Castle, A Extra Level, the Scratch and Match Bonus Game (SNES Only), and a Secret Level (GBA Only). Most of the levels in the world are set on forested mountains or in dusky uplands.

List of Levels in World 2
Here are all the levels in World 2:

Visit Koopa and Para-Koopa
The first appearance of Koopa Troopa alongside with Koopa Paratroopa. This level is very mountainous and has a lot of falling platforms that will crush Yoshi or simply fall into a pit. Also, this is the first time Baby Mario can morph into Superstar Mario.

The Baseball Boys
Both Sluggers and Green Gloves team up here, to create a pitcher and a batter. The player must watch out, since the egg might push the player into a hazard such as Spikes.

What's Gusty Taste Like?
This is Gusty's first appearance in the game, and half of the level will take place in the overworld, while the other half will take place underground. A bonus mini-game room is also located here as well.

The Bigger Boo's Fort
A fort with many Boos and Big Boos. This is also the first appearance of Boo Man Bluff. Many Swoopers will aid Bigger Boo in the fight, and alot of ! Switches can be found in this level too.

Watch Out For Lakitu
Lakitu, Cactus Jack, and a regular Cactus make their first appearances throughout the game. This stage has alot of Shy Guys in it, and is also the first time that Yoshi will be able to tranform into Yoshi Train.

The Cave Of The Mystery Maze
The player will be outside in the start of the level. They will soon be in an underground room once they hit the ? Cloud containing a door. The player will be in a smoke filled room, and will carefully advance to reach another room that will lead outside to a beachside area.

Lakitu's Wall
Many Wall Lakitus are seen in this level. The player will also be in a mountainous area, filled with falling ledges and coins. Fat Guys make their first appearance here too.

The Potted Ghost's Castle
The boss of World 2, along with two Green Shy Guys aiding him. This level contains many areas in which Yoshi will be inside a pipe, along with thorns. Yoshi will also be able to transform into Train Yoshi in this level.

Mystery of the Castle?
This level contains a maze which is very complex. There will also be a section in which the player will have to ride Flatbed Ferries in order to advance throughout the level.

Hit That Switch!
The second Extra level in the game. The player will have to quickly advance while hitting the ! Switches and avoiding Piranha Plants. There is also a pipe in the beginning that contains stars, which will be the only time the player will get them too.