I think this signals a fundamental change in how a pokémon’s IVs are generated, and maybe even how their EVs are calculated. I was wondering how they were going to validate 'mons from previous games in Pokémon Champions, and I guess this is it.

I hope they get the games to a point where Pokémon are transferable both ways always.

I hesitated moving my Pokémon forward from ds to 3ds and now those are lost to me.

I heared it’s about the additional language that makes problems, weird reason. And it’s possible to transfer those to future game. But i haven’t found a source for that.