Mario Kart 8 Deluxe – Booster Course Pass

The Mario Kart 8 Deluxe – Booster Course Pass is a DLC expansion pack for Mario Kart 8 Deluxe, announced during a Nintendo Direct held on February 9, 2022. The pack includes 12 additional cups, for a total of 48 additional courses (bringing the total number of courses to 96), most of which are remastered versions of courses from other Mario Kart games, including Mario Kart Tour. The courses are based on their designs from Mario Kart Tour, with the exception of and, which are currently absent from said game. However, the courses have received visual improvements and new music arrangements compared to Mario Kart Tour. The pack marks the longest gap between the original release of a Mario game and the release of its DLC, releasing nearly five years after Mario Kart 8 Deluxe did. The pack also makes Mario Kart 8 Deluxe the first Mario Kart game to feature classic courses from games following the original game's release, with Mario Kart Tour and its reappearing courses debuting after 8 Deluxe was initially released.

The pack is set to be released in six waves by the end of 2023. It can be purchased on its own, but is also included in the Nintendo Switch Online + Expansion Pack membership. The first wave of the DLC was made available to pre-load on March 15, 2022, and was released on March 18, 2022. If the player has purchased the Booster Course Pass or currently has a Nintendo Switch Online + Expansion Pack membership, a small icon of a Super Star can be seen next to the version number on the game's title screen.

Courses
Each of the six waves features two cups, each with four courses, for eight courses per wave. As of the second wave, there is one course each from Super Mario Kart and Mario Kart 7, two courses from Mario Kart 64, Mario Kart: Super Circuit, Mario Kart DS, and Mario Kart Wii, and six courses from Mario Kart Tour. Currently, there are no courses from Mario Kart: Double Dash!! Excluding the Tour courses, GBA Snow Land and DS Shroom Ridge are currently the only courses in the Booster Course Pass that have not previously appeared as a classic course.

Trivia

 * The pass was once erroneously referred to as the "Mario Kart 8 Deluxe – Booster Course Pack" on the official North American webpage. This error has since been corrected.
 * The courses shown in the key artwork use official screenshots and in-game course icons from Mario Kart Tour. Some screenshots of the courses show Paris Promenade and Paris Promenade 3 with barrier fences from that game. The artwork also features an official screenshot of the ninja Shy Guys in Ninja Hideaway, which originated from the Ninja Tour's in-game preview.
 * An alternate version of this key artwork has been discovered via datamine and shows several currently unreleased courses. This banner also uses official screenshots and in-game course thumbnails from Mario Kart Tour, including thumbnails for T and R/T variants.
 * Another datamine for the game reveals prefixes for upcoming courses. The courses without prefixes are likely Mario Kart Tour's new courses.
 * In-game, Tour Ninja Hideaway's name is shown without the Tour identifier, making it appear as if it is a new course.
 * The countries of the 150cc staff ghosts for Mario Kart Tour's city courses match the cities' respective countries: 's staff ghost is from France and 's staff ghost is from Japan.