World 2 (New Super Mario Bros. Wii)

World 2, is the second world of New Super Mario Bros. Wii. The levels are all desert themed. There are eight levels in this world, two of them being castle levels that are guarded by Roy Koopa. Various Mushroom Houses are also found around here, giving the player items such as Starmans, Mushrooms, and Propeller Mushrooms. On the map, there is an area where Mario and the gang can get sucked into the sand and play in a level where they have to collect all the Toad Balloons without dying.

World 2-1
This level takes place in a pit. In this level there are many geyser-like eruptions of sand jetting out of bottomless pits, which the player can stand on. Boomerang Bros. make their only appearance in this level.

World 2-2
This level is filled with barrels and new enemies for the game called Spikes. These enemies attack by chucking spike balls at the player. There are areas with platforms infested with koopas and spikes. If the player goes into a pipe near the plaforms right after the halfway point, they can get a Mini Mushroom that will let them go into the mini pipe and let them skip a great part of the level.

World 2-3
This level is a pitch dark cave, which is dimly lit by lanterns, Fire Bros. Fire Snakes, and fire-spitting Venus Fire Traps. The player must use a Fire Flower and shoot fireballs to improve visibility.

World 2-Fortress
This tower features metallic fences that the player can cling on. As the player advances, purple fireballs will appear from above. They can be taken out with ice balls.

Roy Koopa is fought at the end of the tower.

World 2-4
This level has many floating coins and Koopas, as well as POW Blocks. Every few seconds, wind blows in the level, forcing the player to the right. There's a secret exit near the end that'll take the player directly to World 2-Castle. This exit, along with some Star Coins, make use of Propeller Mario.

World 2-5
This level has many Pokeys, and there's also a Yoshi in this level, which makes taking out Pokeys easy, while following the beat of the music. Lakitu also makes an appearance here and throws Spinies, which can easily make the player's Yoshi fall in the quicksand.

World 2-6
This is a mushroom level that mostly has moving coins and blocks. The player will have to ride a pink block for the majority of the course, but a Propeller Suit is needed to access the secret cannon of the level. The cannon leads to World 5. Fire Chomps make an appearance here.

Enemy Course

 * Four Spinies
 * Six Spinies
 * Eight Spinies

When 2-5 or 2-6 are beaten, 6 spots on the map will open, and every time the player moves onto one of the spots, 2 holes will shoot up. If the player(s) is(are) on the platform when this happens, they will fall.

World 2-Castle
This castle is filled with lava pits, and three way corridors, of which only one is the correct path, much like in Super Mario Bros. and Super Mario Bros.: The Lost Levels.

In order to complete that area quickly, the player needs to take the upper route, the lower route, and the center route in that exact order.

Roy Koopa is fought here for the second time. He attacks by popping out of the pipes from above.

Enemies Introduced

 * Boomerang Bros.
 * Pokeys
 * Lakitus
 * Spinies
 * Super Piranha Plants
 * Super Venus Fire Traps
 * Fire Chomps
 * Spike Tops
 * Fire Snakes
 * Fire Bros.
 * Spikes
 * Ball 'n' Chains
 * Fly Guys