This landmark update added the final Wave 6 of the Booster Course Pass, bringing the total course count to 96. It introduced four new characters—Diddy Kong, Funky Kong, Pauline, and Peachette—alongside 17 new Mii racing suits. Gameplay adjustments included a "Music" button in the menu and various balance changes to kart invincibility stats. Version 3.0.1 (November 2023):
In the context of the Switch modification community, you might see this update associated with specific file types: Wave 6 is here! - Play Nintendo Mario Kart 8 Deluxe Switch NSP XCI -Update 3.0....
Fully revamped with Balloon Battle and Renegade Roundup. This landmark update added the final Wave 6
The "Update 3.0.3" for represents the final polish on a game that has spanned two console generations and a decade of development. Version 3
The game is available in NSP (Nintendo eShop) and XCI (ROM Image) formats. NSP files are used for digital distribution on the Nintendo eShop, while XCI files are used for cartridge-based games.
Like all major updates, 3.0 smoothed out rough edges. It improved the online matchmaking stability, fixed minor graphical glitches on certain tracks, and adjusted the balancing of some vehicle parts to ensure fair competitive play.