[Known/Fixed]Maybe Gen7 Kanto mons' egg moves are giving trouble?

[Candy 1688]

So I bred pretty A-vulpixes with moonblast, encore and freeze-dry, but I get the infamous "illegal move" message when I go online.

I checked with each one of them, and every time I got the same message.

Also, when I deleted all of the moves, and left it just with normal powder snow, the message didn't appear.

Hence I conclude that it's egg moves in general that are giving trouble, and since A-vulpix is a new Gen7 mon, I assume the problem is just with Gen7 mons.

Edit: Apparently there isn't an issue with normal Alola mons, but judging from another thread posted after this one, I think I'll change my theory to just Gen7 mons that are Alolan variants of Kanto mons.

[Nydaomond 0]

Hopefully it might be helpful to gather more info on the issue, but not all egg moves seem to cause the issue either.

 

I was just now breeding an Alolan Meowth with Parting Shot and Foul Play (which are both egg moves for it), tried to access online functionality, and received the error. Then, i tested by deleting one move at a time, and could access online functionality after deleting only Parting Shot (so the Alolan Meowth now knew only Scratch, Growl, and Foul Play); however, since both Meowth versions can learn Foul Play via breeding, could the issue be related to breeding moves that only the Alolan version can learn?

[Marcello 436]

This is two issues, as it turns out. The illegal mon system was checking the movelist of the wrong formes for both Egg Moves, and also for pre-evo only moves. Fixed for Public, thanks!