Yessir. It just swept half a team by itself. I figured since this guy can't really outspeed much without some EV investment, and the fact that every metagross freaking carries explosion, the meteor mash not only hits like a freaking truck, but can boost his other moves (it also eats breeloms alive if it still has its berry).
Granted I'm testing this on an alt account, but still, he's showing promise.