Welcome to Smogon! Take a moment to read the Introduction to Smogon for a run-down on everything Smogon, and make sure you take some time to read the global rules.
I've been using this:
Furfrou
Chesto Berry
Impish
80At/252Df/168SpD/4Spd (I think)
Return
Sucker Punch
Toxic
Rest
It works surprisingly well. Most unboosted physical attacks don't do enough damage before a toxic/return combo finishes them off.
I should also mention that most people don't...