World Mushroom (New Super Mario Bros. 2)

World Mushroom is the first special world in New Super Mario Bros. 2. This world has a generic design which is similar to that of World Flower and World Star. The background colour of this world is pink. It is an alternative world to World 2 and thus it is optional. This world can be accessed by completing World 1-Cannon. There are 3 Toad Houses in this world, one of each of red, green and yellow (Star) varieties.

There are 9 levels in this world and, unlike normal worlds, does not have a tower level. There is also only 3 normal levels on the main path in this world, contradictory to 5 to 6 levels in normal worlds. Levels in this world (other than World Mushroom-Rainbow and World Mushroom-Cannon) can be based on any theme. There is also a Ghost House in this world. There are also two secret levels which the players have to find the secret exits for. The world ends, as always, with the castle level, where Larry Koopa, the boss of this world, is waiting, unless the player takes the path to the cannon, which will lead to World Flower when completed, allowing the player to skip an additional two worlds, World 3 and World 4.

Mario begins on the floor of the world beside a Cannon Pipe. The overworld music here is a remix of the overworld theme in World 1. As Mario enters the Cannon Pipe, two rows of coins appear one after another above the pipe and Mario gets shot out into the sky, collecting the coins. Mario will then land on an orange moving platform. Coins will then begin spewing out from the top and bottom of the area. Three fast spinning coin rings of various sizes can then be found and collected. A large Coin Roulette Block containing 10, 50 or 100 coins can then be found. This is followed by another set of spinning coin rings and a Red Ring. The Red Coins spin along with several spinning coins which has a flower-like pattern. Collecting the 8 Red Coins replaces the player's inventory with a Gold Flower. This is followed by more coins being spewed out from the top and bottom of the area. Finally, a 100 Gold Coin will fall, marking the end of the course.

Star Coins

 * Star Coin 1:
 * Star Coin 2:
 * Star Coin 3:

Star Coins

 * Star Coin 1:
 * Star Coin 2:
 * Star Coin 3:

Star Coins

 * Star Coin 1:
 * Star Coin 2:
 * Star Coin 3:

Star Coins

 * Star Coin 1:
 * Star Coin 2:
 * Star Coin 3:

Star Coins

 * Star Coin 1:
 * Star Coin 2:
 * Star Coin 3:

Star Coins

 * Star Coin 1:
 * Star Coin 2:
 * Star Coin 3:

Undead Piranha Plants, Super Undead Piranha Plants and Whomps appear in this castle while getting chased by a Giant Spiked Ball.

Star Coins

 * Star Coin 1:
 * Star Coin 2:
 * Star Coin 3: