Run a few calculations on moves you think you'll be facing on common VCG pokemon.
That's the best advice I can give, and test it online on PO & PS before you justify having it on your team, you may find it doesn't work as well as you would like it to. :)
But who knows? it could have great synergy with your team, that's pokemon, it's more about how you exploit their individual traits as a pose to base stats and numbers.
Good luck with it, Unowninator!