: NSP files are essentially game files or updates for the Nintendo Switch. They can be used to install games or updates through tools like the Nintendo Switch Homebrew Menu or tools designed for managing Switch game files.
Downloading .rar files from unofficial sources carries significant security risks, including malware or phishing. Official game files are never distributed via file-sharing sites in this manner. Pokemon Legends Arceus -NSP--Update 1.1.1-.rar