Hi. For a while know, I've had these 01044 XY Sylveons that keep getting flagged in PKHeX. I had no idea why because I'm sure they're legit, but today I found the reason why. Apparently PKHeX is indexing the met location 1 off from the correct location. The correct location, as seen in the wondercard uploaded here and the info on Bulbapedia, should be "a Pokemon event." But PKHeX is indexing it to "a Pokemon movie".
Legit Sylveon:
Hacked Sylveon: