Everyone has Knock Off and Sucker Punch.
He can't switch into anything and scarfed things fuck him.
Trace is pretty great, and if you know how to use and have subs you'll be able to sweep. If not, it's a good pokemon for hit and switch.
Future Sight sets are my favorites in that regard. You use it, and two turns later, if your opponent have a Dark-type mon, it will be there.
And you'll hit it a fighting move.
