When we get 16, it will.
Wobbuffet is INSANE; Shadow Tag prevents switching, plus it has Counter and Mirror Coat.
If they're obviously a Physical Attacker, you use Counter; if they're special, Mirror Coat, and for Mixed Attackers you use Encore to see if they used a Psysical or Special. Then that attack repeats, so you can use whatever move matches their attacking style. Remember, the only way out is U-turn, and most Wobbuffet users would never switch into a possible U-Turner.
Wynaut is basically the same thing, except with lower stats, which is why it's also Uber.