World Mushroom (New Super Mario Bros. 2)
- Not to be confused with Mushroom World.
World Mushroom is the first special world and the seventh world appearing 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 color 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-
Warp Cannon. There are three Toad Houses in this world, one of each of red, green, and yellow (Star) varieties.
There are nine levels in this world and, unlike normal worlds, does not have a tower level. There is also only three normal levels on the main path in this world, contradictory to the five-to-six levels found 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.
Levels
| Level | Preview | Description |
|---|---|---|
World  Mushroom- Rainbow
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The rainbow course. Read more... |
| World Mushroom-1
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This level takes place in the sky with many colored block platforms. Read more... |
| World Mushroom-2
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It is a water-themed autoscroll level packed with many Urchins and Deep Cheeps. Read more... |
World Mushroom- Ghost House
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This level is a maze-like Ghost House where almost every door leads to a different room, thus comprising of several areas. Read more... |
| World Mushroom-A
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This is an ice-themed level taking place underground. Common enemies here are Dry Bones and Spiked Balls. Read more... |
| World Mushroom-3
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It is an underground-themed level cramped with sandy-looking objects, Buzzy Beetles, and red POW Blocks. Read more... |
| World Mushroom-Warp Cannon
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The cannon of this world. It takes the player to World Flower. Read more... |
| World Mushroom-B
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This level is an autoscroll level composed of many Beanstalks and Koopa Troopas. Read more... |
World Mushroom- Castle
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It is a level full of Whomps that attempt to crush Mario, along with humongous Spiked Balls that destroy everything in their path. Read more... |
Enemies introduced
Names in other languages
| Language | Name | Meaning | Notes |
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