Problem with that is that you have to convince the Terakion user that CC is their best option and then absorb it, meaning that with a mispredict you'll end up losing a 'mon and even with a good predict you'll end up taking a hefty chunk of damage. Even worse, there's always the possibility that Terakion will just switch and set up again later with no ill effects due to its SR 2x immunity. That's pretty brutal. Not saying it's uber, just very, very strong.
SR 2x *resist
Anyway,the only two things I can think of that can reliably counter him is Claydol and Goruggo(Ground/Ghost) :/