An NSP file is played directly on a stock Nintendo Switch. It is intended for:
"Remember, Lila, it's not just about having the strongest Pokémon," Max said. "It's about understanding their strengths and weaknesses, and using the right strategies to win battles." pokémon scarlet switch nsp
When discussing digital backups or software for the Nintendo Switch, two primary file formats are commonly used: An NSP file is played directly on a stock Nintendo Switch