I think we're going about this wrong, but anyway. We're not creating something which actively punishes the use of secondary damage moves, but rather punishes the users of said secondary damage moves. It may seem subtle, but there is a difference. If later on in the CaP we create a a secondary damage abuser, if this CaP continues like this, it will probably be uneffective against it, because all we're doing is going "lots of Trick users are Psychic, lets give this thing Dark type and offensive to hit them". What happens to the non-Psychic trick users, etc?
The way I think we should have gone about this is using things which actively punish the use of secondary moves, regardless of the user, and turn them on their heads. This would be done through the use of abilities like Guts, or perhaps Klutz to backfire Tricksters with stuff. Because of that, I think this Pokemon should be Somewhat Defensive, capable of switching in repeatedly, then relying on whatever abilites/movepool it has to completely turn the tables on secondary moves. It also prevents it from just being used arbitrarily as a sweeper, which I bet you will happen to this CaP. Much like Kitsunoh, we're missing the point and instead just creating Sweeper X which happens to possibly fulfill a few of the concept points almost by co-incidence.
So, yeah Somewhat Defensive.