Downloading copyrighted game files for games you do not own is illegal in most jurisdictions. The safest and most ethical route is to use a homebrew-enabled Wii U console to dump your own physical discs and digital purchases using tools like ddd or Dumpling .
If you have legally dumped your own Wii U games and decrypted them, or are managing preserved files, here is how they interact with modern software: For PC Emulation (Cemu) archiveorg wii u games patched