Meloetta doesn't have a QR code. Only Alola Dex Pokemon have QR codes, and even then, a lot of legendary and other rare Pokemon don't have QR codes.
Trying to complete my dex, I've had my Pheromosa in the GTS for a kartana. It's been a while and I wonder does it matter that I typed in the name because I didn't see it yet? Usually GTS goes really fast when you have a fair trade set up. It's literally the last Pokemon I need.
Thanks,I'll just have to play the waiting game then.The only thing that typing in a Pokemon name in the "Which Pokemon?" function just simply disallows you to search for genders. (But since Kartana has no gender; you're okay)