- Not to be confused with World Mushroom (New Super Mario Bros. 2).
Template:Worldbox World Mushroom (called Mushroom World on Miiverse) is the second special world and the tenth world in Super Mario 3D World. It sits adjacent to World Flower and consists of remixes of previous courses; they are harder versions which may be set at a different time of day, be a speed run course or have additional objectives. It is unlocked after clearing Cosmic Cannon Cluster in World Star. This world contains seven regular courses and one Mystery House. It is the first world not to contain any stamps within its levels.
Levels
| Level Number | Level Name | Preview | Description |
|---|---|---|---|
World  Mushroom-1
|
Night Falls on Really Rolling Hills | File:NightFalls.png | A harder version of Really Rolling Hills set at the black sky. The player only gets 30 seconds at the start of the level and must collect extra cyan 10+ clocks. |
| World Mushroom-2
|
Spiky Mount Beanpole | 
|
A harder version of Mount Beanpole set at sunset. The player must find five keys in order to unlock the ! box to the goal pole. |
| World Mushroom-3
|
Deep-Black Jungle Drift | 
|
A harder version of Deep Jungle Drift that takes place in the dead of night. Because the level is so dark, the players are able to use Light Boxes which emit light rays in their color. |
| World Mushroom-4
|
Trouble in Shadow-Play Alley | 
|
A harder and shorter version of Shadow-Play Alley featuring cannonballs and a Goomba Tower. The Player has only 100 seconds to finish the level, and, there are no time clocks in this level. |
| World Mushroom-5
|
Back to Hands-On Hall | File:Back to Hans-on Hall.jpg | A slightly more difficult version of Hands-On Hall set in the blue sky. |
| World Mushroom-6
|
Gigantic Seasick Wreck | 
|
A more difficult version of Spooky Seasick Wreck with Ty-Foos and Mega Mushrooms. |
| World Mushroom-7
|
Broken Blue Bully Belt | 
|
A harder version of Boiling Blue Bully Belt, which requires 240 Green Stars to play. |
World Mushroom- Mystery House
|
Mystery House Brawl | 
|
The Mystery House of World Mushroom featuring the player defeating various enemies to get the Green Stars. |
