When dealing with Nintendo Switch backups and modifications, you will encounter two primary file formats: XCI and NSP.

Users with a modified console (running CFW) often look for the files to install the latest update and DLC .

There are two primary ways to access the "updated" content on a Nintendo Switch. Official Nintendo Method (DLC)

If you own the game legally, simply update via the Nintendo eShop. If you are using custom firmware, ensure you grab the and the full DLC unlocked to enjoy Wave 6.

Addressed a critical security flaw in the game's netcode to prevent buffer overflow issues during online play.

is typically distributed as a separate "DLC Unlocker" file that must be installed alongside the base game and the latest update. Booster Course Pass Wave 6 Highlights The final wave (Wave 6) was released on November 9, 2023 , and included the final major content additions: New Characters : Diddy Kong, Funky Kong, Pauline, and Peachette. New Tracks : Rome Avanti ( ), DK Mountain ( ), Daisy Circuit ( ), and Piranha Plant Cove. : Madrid Drive ( ), Rosalina's Ice World ( ), Bowser Castle 3 ( ), and Rainbow Road ( Bonus Features : 17 additional Mii Racing Suits and a new Music Player feature for listening to course tracks. Installation Requirements for Backups

The DLC has been delivered in six distinct waves, adding 48 courses in total 0.5.3:

Assuming you have a Switch with custom firmware (Atmosphere, SX OS, or Ryujinx/Yuzu emulator on PC), here is the standard workflow for an updated install:

If you install the base game (Ver. 1.0.0) and try to load the Wave 6 DLC, the game will crash immediately. You must have the 3.0.1 update file installed sequentially.

Whether you are looking for the latest files (if you are playing on a modified Nintendo Switch), looking to purchase the official DLC , or just looking to learn how to update your game, this guide provides a complete overview of the Mario Kart 8 Deluxe update landscape as of 2026. 1. The Final State of Mario Kart 8 Deluxe (Updated DLC)