It is a sky world similar to World 7 from previous New Super Mario Bros. games, but unlike those worlds, Meringue Clouds takes place during sunset and Ludwig's Clockwork Castle taking place right in front of the tornado surrounding Peach's Castle, which is marked off by different cloud coloration. It seems to take over a cliff next to World 1, the grass-themed world from the previous New Super Mario Bros. games, in between Rock-Candy Mines and Peach's Castle. Its name is derived from a French dessert made from whipped egg whites and sugar. There are 10 levels in this world, with 6 normal levels, one being the third Ghost House in the game, the Tower level, the Castle level and the Airship level. The boss of this world is Ludwig von Koopa.
The second and final airship with Bowser Jr. as the boss. This airship has two portions: one on the ground, and another portion on the airship. This is the only level in the game to have Rocky Wrenches and two Checkpoint Flags.
As its name states, this level is mainly set on halls surrounded by rainbow walls, as well as colorful wooden blocks. Luigi encounters Bullet Bills and Waddlewings.
Meringue Clouds appears in Super Smash Bros. for Wii U and Super Smash Bros. Ultimate as one of the stage variations of the Mushroom Kingdom U stage, using the sunset setting found in two of its stages. The layout consists of a few platforms, including two that players can fall through. Several obstacles may appear in this section of the stage, including Stretch Blocks, water geysers that may carry Big Urchins, and a giant beanstalk that grows in the middle of the stage.
Meringue Clouds is the thirteenth Property on the game board in Monopoly Gamer. It is one of two properties in the Green Color Set (along with Switchback Hill).