Mushroom Kingdom U

Mushroom Kingdom U is a stage that appears in Super Smash Bros. for Wii U. It is based on several elements from New Super Mario Bros. U.

The match starts off on a stage based on Acorn Plains with Stretch Blocks. At certain points during a match, however, Kamek will appear and change the layout of the stage, in a manner similar to his role in the New Super Mario Bros. games. The stage variations that randomly appear after the initial layout are based on Rock-Candy Mines, Meringue Clouds, and the Tower levels (Slide Lift Tower in particular).

In the Rock-Candy Mines variation, characters fight on a wide tilting platform. In the Meringue Clouds variation, the match is set in an area similar to the Bouncy Cloud Boomerangs level. In the Tower variation, the stage takes place on the moving platforms from the Slide Lift Tower level. Occasionally, in all stage layout variants, Water Spouts (sometimes with Mega Urchins floating on top), falling Icicles, and the beanstalk from the Skyward Stalk level spawning extra platforms may appear.

It has also be confirmed that Nabbit will appear in the stage and will be able to catch fighters and put them in his bag.

One of the selectable tracks for the stage is an arrangement medley of the overworld and underground themes from Super Mario Bros..