NSP (Nintendo Switch Package) is a file format used for distributing games and other content on the Nintendo Switch console. The NSP update 3.0.1 RAR file specifically refers to a compressed archive containing the updated version of Pokémon Scarlet, which includes bug fixes, performance enhancements, and new features.
Fixed an issue where the effect of the move "Dragon Cheer" would incorrectly persist even after a Pokémon was switched out. pokemon scarlet nspupdate 301rar best