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QR Scan them to your pokedex and then trade them over GTS for the rowlet, that's what I did
Only reason I need to Find someone with Solgaleo and Kartana is because they have no qr codes
I don't have pokerus pokemon, if you want a good offer tho I can trade you a Ditto I have 4/6 perfect IV's Caught ingame Plus-marked symbol and everything, for an Kartana?