Yache + Dragon = win, you should try it. :P I used to run a Yache 'Chomp before he was banned. He did wonders for me.
'Chomp @ Yache, Jolly, 252 atk/spe 4HP
Weird set, eh? Yache on a substituter. I usually sub to see what they have coming in, if it's something that'l beam, I switch. If not, I either attack to leave a dent and retreat, or set up and begin to devastate. Combine my TTar's Sandstream with Substitute and SD, and you've got some hax on your hands. XD
...The funny thing is that even though I battled atleast 10 times with this strategy, and I only pulled off a double SD thanks to sandveil causing a miss when a sub was up once.