To play with friends or matchmake online, your game version must match the current public server version.
In the context of your query, "NSP" and "free" often relate to how players on modded consoles or emulators manage game files. NSP File Format super smash bros ultimate nspupdate 1302 free
There isn't a known "free" version of Super Smash Bros. Ultimate that is officially supported by Nintendo outside of trial versions, demos, or promotions that might be offered for a limited time. To play with friends or matchmake online, your