Update your Nintendo Switch system firmware using tools like Daybreak, and update your Atmosphere CFW files to the corresponding version. 2. Error: "Corrupted Data Detected" This issue points to missing or outdated signature patches.
: Primarily distributed as an NSP (Nintendo Submission Package) file from the eShop. Pokemon UNITE Switch NSP XCI UPDATE
If you are looking for an NSP/XCI to play UNITE on PC, here is the performance breakdown: Update your Nintendo Switch system firmware using tools