Mario Kart 8 Deluxe on the Nintendo Switch, the ultimate "patched" version includes the base game updated to the latest software version (currently Ver. 3.0.3 or higher) and the full Booster Course Pass DLC Latest Software Update: Ver. 3.0.3

The "DLC Patched" versions you see in search results are usually a response to this specific era. They are pre-modified files where the DLC is "integrated" into the main game data or has had its decryption keys stripped, allowing it to run on firmware that technically shouldn't support it without a Nintendo Online subscription.

Instead of managing multiple separate files, a "solid piece" assembly usually includes: Base Game: The original Mario Kart 8 Deluxe

3. The Booster Course Pass (DLC)

The biggest evolution for the game came in the form of the Booster Course Pass (BCP). This DLC effectively doubled the number of tracks in the game, bringing back favorites from older Mario Kart games (Wave 1 through Wave 6).

• XCI is a raw, cartridge-dump format (Read-Only).
• NSP is a Nintendo Submission Package—the format used for digital eShop downloads.

⚠️ Important: If you have a patched Switch without a modchip, you cannot install NSP files. Period. No software exploit exists for these units.

• “Software closed because an error occurred”: Your update NSP and base NSP have a region mismatch (e.g., US base + JP update). Ensure all files share the same title ID region.
• “DLC courses are locked”: You installed the update but forgot the DLC unlocker NSP. You need the patch file.

Update Files: These are patches that introduce bug fixes, performance improvements (such as rearview mirror adjustments), and critical support for new content.