As long as the Pokemon is legal, I personally don't give a muk if it was bred or genned or whatever. The important thing to me is the battle, not how the other player obtained their team (and let's be real, breeding is still a bit of a boring process).
Everything I have ever used though in cartridge battles is, afaik, legitimately bred, or a clone of a legitimate Pokemon.
Nah ンン
“No, I... I have to be strong. Everyone expects me to."