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I'm gonna clue you fuckers in on probably the best use for this glitch since all the usual clickbait channels are too stupid to think bigger than "unlimited ability patches!!" (item printer already gives you a ton of everything you need at this point) and "free mythicals!!" (most of the interesting ones will be flagged due to duplicated Home tracker IDs anyway) - the most unique feature of this clone glitch is that it takes an existing pokemon and clones it perfectly, except you then overwrite part of it with your own catch data.
Therefore, if you take one of the traded mons you get from the Blueberry League coaches and successfully dupe it, you can now have the "[Anon]'s [Pokemon]" title, instead of Iono or Penny or Rika's.
I've done Clodsire, Zebstrika, Duraldon, three Eevee and Tinkaton, and i'm sure you can probably do most of the other Partner mons too: you have 30 mons to choose from now that the epilogue is out, although some might be too small to work with this glitch like Glimmet or Gimmighoul (i've been unsuccessful trying to dupe Kieran's Applin for about an hour cause I want to dupe it without evolving it into Hydrapple so I can take it into Sword and Shield).