Originally Posted by Latisiblings
Bro, Quaggy has Unaware. It means it negates all boosts when you attack it. So, Swagger would double the damage you take from confusion, but not when you end up attacking Quaggy. Hope that clears things up.
I already know that I calculated all the damage without any boosts and they can all still 2HKO a physically defensive quagsire (bar gyarados).