: If you have a file ending in (2).rar , it is often part of a split archive. You generally need all pieces (e.g., part 1, part 2, etc.) in the same folder to extract the full .nsp file using a tool like 7-Zip or WinRAR.
: If you are looking for the "other piece" to complete the set, you would need to locate the original source where you found part 2 to download part 1. Super Kirby Clash (NSP)(eShop) (2).rar
Do you have the of this archive, or are you seeing an error message when trying to open this specific file? : If you have a file ending in (2)