If you have multiple .rar or .zip files (e.g., part1.rar , part2.rar ), you should select all of them and extract them to the same folder using a tool like WinRAR or 7-Zip .

The specific version v65536 indicates this is likely the base game or a major update. You can use tools like DBI or Tinfoil to install this file directly to your system.

After extraction, you should be left with one single .nsp (Nintendo Submission Package) file. This is the "proper piece" required for installation on a modded console or for use with an emulator.