Southperry Pokemon League.

Fairly sure he will. It's basically a guareented ko on a pokemon of your choice if your opponent isn't using a ghost type at the time you send Wobuffet out. And there is still the good chance you could destiny bond a second pokemon after that, which is why he was put in ubers in the first place.

And if your opponent does have a ghost type out, you just wouldn't send a wobuffet out in the first place, so it's not that much of a counter.

Pewsks raises a good point about speed boost blaziken too.

Wobbuffet hasn't been ubers for quite a while, just saying. Why would he be put back in ubers when his key ability(Shadow tag) got a slight nerf?