Mario-kart-live-home-circuit-nsp-update-nsp-rom...

: Users typically install such NSP files using tools like Tinfoil or DBI.

: 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 Mario-Kart-Live-Home-Circuit-NSP-Update-NSP-ROM...

: 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. : Users typically install such NSP files using