Without specific details about "Little-Friends-Dogs-and-Cats-nsp.rar", it's challenging to say exactly what it contains. However, the ".nsp" part sometimes relates to Nintendo Switch game files (NSP stands for Nintendo Submission Package), which are used for distributing games on the Nintendo Switch console.
You can buy a physical game card from major retailers like Amazon, Best Buy, GameStop, or Target. Physical copies can sometimes be found used at lower prices. Little-Friends-Dogs-and-Cats-nsp.rar