Sky-High Sundae

Sky-High Sundae is a course set to be released as part of Wave 2 in the Booster Course Pass for Mario Kart 8 Deluxe and at a later date in Mario Kart Tour. This essentially makes Sky-High Sundae the first course from Mario Kart 8 Deluxe to make an appearance in Mario Kart Tour. It is the fourth and final course of the Propeller Cup in Mario Kart 8 Deluxe and is currently the only new course in the Booster Course Pass. It is set in a large region made entirely of ice cream and other candy-related food high in the sky. It is the fourth course in the series to be set entirely in anti-gravity, after Mute City,, and Big Blue.

Course layout
The track starts off inside of a giant freezer, after which the racers use glider ramps to fly either into or around a giant ice cream cone. Flying into the hole in the cone will reward players with Item Boxes. After that, they will land on a chocolate-covered cake with a giant H on it, resembling a helipad. Upon landing, they will begin travelling down a light blue staircase, and at the bottom the path will begin curving to the left while proceeding to go up a staircase. At both staircases, there are railings which split the players. After the upward staircase, the player will begin to ascend a slope which splits off into two paths. At the top of those paths, they will begin jumping down onto some platforms, which can be landed both above and below. After the two paths join back together, a path made out of giant ice cream cones will circle around an even larger piece of ice cream inside a cup. After turning around, the player will jump between three giant pieces of ice, which will lead to a giant ice tray that leads back into the giant freezer where the Finish Line is.

During the race, various advertisements can be seen on giant waffle pieces. At the staircase segment, there are numerous ice cream shops to the right of the path. In the sky, a helicopter modeled after an ice cream cone can be seen, complimenting the helipad seen at the beginning.

Trivia

 * Following the release of the first wave of the Booster Course Pass, a datamine revealed a banner featuring numerous unreleased courses. Among the courses was [[Media:MK8D-Banner-Leak-SHS.png|an image of Sky-High Sundae]], four months before the course's official series debut.
 * Sky-High Sundae is the first course in Mario Kart history to be announced for two separate games simultaneously.