For an emulator to read the game, the file must be "decrypted." System Requirements for PC

Before you search for download links, ensure your hardware can handle the 3DS graphics. Windows 7 (64-bit) or higher / macOS / Linux.

To run Pokémon Sun or Moon on a Windows or Mac computer, you cannot simply click an ".exe" file. You must use a 3DS emulator. An emulator is software that mimics the hardware of the original console.

Go to "Emulation" > "Configure" > "Controls" to map the 3DS buttons to your keyboard or a USB controller. Why Mediafire?

You will need a ROM of Pokémon Sun or Moon. Users typically look for these on hosting sites like Mediafire or Mega.