Since you likely won't have the physical NFC reader or figurines for your PC, emulators like Cemu have built-in tools to simulate these. This allows you to unlock "Special" Pokémon that were previously only available to collectors. If you're ready to get started, let me know: Do you need help for the first time? Do you need a guide on how to dump your own Wii U discs ?
: A popular, fast-direct-download source for various console libraries. Internet Archive (archive.org) Pokemon Rumble U Rom Download
Pokémon Rumble U is considered playable in Cemu, but users often report specific issues: Since you likely won't have the physical NFC