Since I thought of this sooner, might as well bring it up. I'm a sort of noob to all this (I hate competitive battling when it actually comes to doing it, but I love reading/discussing it), so someone can probably refute this easily.
Counter to Garchomp when it first comes out. Since it's going to use a turn to use SD, switch to Wobbuffet. Then immediately switch out to Milotic. Shadow Tag carries over to trap Garchomp, then survive whatever hit comes, and Ice Beam him to death. Pretty sure no one packs a Garchomp with Baton Pass...that is if it can even learn it in the first place.
Does that work?