>>45094679Bruh special Aegislash is way more common.
And if you're trying to counter it by setting up you deserve to lose. They expect you to think they're going for King's Shield after an Attack, so they use another attack, then King's Shield the next turn.
And yes, Aegislash would protect itself if you're bringing a Pokémon that has STAB Knock Off or is known to frequently run it.
And no, Aegislash isn't gonna spend turns setting up. Swords Dance Aegislash hasn't been the standard set since X and Y, and it's unlikely to be the one you run into.