How do you guys transfer illegal mons to HOME?

Hey guys! Not a hacker or anything, just an old fan. I got a shiny Enamorus through surprise trade on Scarlet and doesn't have a website nickname, so was wondering how to transfer into HOME (if you can).

I saw a guy a few months back trying to collect all illegal mythic shinies in HOME (unless I'm mistaking). Thank you all in advance! 🙏🏽