As all posted b4, this is just the set to use:
Ditto @ Choice Scarf
(Hidden Power [rock]/[Grass])
Don't send it in on a substute or Zoroark. Hidden Powers are just to kill stuff like Volcarona, as the tend to use Hidden Power for coverage. If you carry Rock, you can easily OHKO them. Grass is for Rotom, that occasionally carry Hidden Power.
Next week I'd like Gastrodon, the awesome sea slug.
Goodbye Serebiiforums, I will not visit you anymore. I want to be free~