To make work properly with updates using NSP or XCI files on a modded Nintendo Switch or emulator, you must ensure the update version matches the base game's region and that your system environment is correctly configured. Key File Formats
To summarize the query :
You must download separate update files (also in NSP format) and install them over the base game to reach the latest version. On PC/Android Emulators: pokemon lets go pikachu switch nsp xci upd work
: These are raw dumps of the physical game cartridge. They are convenient because they can often be "dropped and played" like a digital cartridge without full installation, saving SD card space. .NSP Files To make work properly with updates using NSP