This is the most common method for DIYers.
(for educational purposes only): On a modded Switch or with an Amiibo emulator (like TagMo on Android), you can use your own dumped Amiibo backups. Dumping your own Amiibo data is allowed in some jurisdictions for personal archival use, but sharing bins publicly is not. mario kart 8 deluxe amiibo bin files
If you need help with the of backing up your own Amiibo or writing your own tags (personal use), I can explain the general steps without providing copyrighted files. Just let me know. This is the most common method for DIYers
To unlock everything, you need bin files for the following compatible series. Note that Mario Kart 8 Deluxe accepts data from the , Mario Party , and general Amiibo lines. and general Amiibo lines.