If you are looking at this for technical or homebrew reasons, common requirements for running these files include:
: Users typically install such NSP files using tools like Tinfoil or DBI. Mario-Kart-Live-Home-Circuit-NSP-Update-NSP-ROM...
: A physical RC kart (Mario or Luigi) is required to actually play the game, as the software uses the kart's built-in camera to create the augmented reality track in your home. Mario Kart Live: Home Circuit NSP/ XCI ROM v2.0.0 Download If you are looking at this for technical
: An NSP (Nintendo Submission Package) is a standard file format used for Nintendo Switch digital games and updates. These files are commonly used by players running Custom Firmware (CFW) like Atmosphere to install games or updates manually. Technical Requirements These files are commonly used by players running
: You do not need to purchase the software separately; it is a free download intended for use with the physical Mario or Luigi kart sets.