Metang @ Choice Band
Ability: Clear Body
EVs: 132 HP / 252 Atk / 124 Spe
Adamant Nature
- Meteor Mash
- Earthquake / Zen Headbutt
- Bullet Punch
- Trick / Pursuit / Explosion
This set is pretty neat for catching things like Vullaby or Gourgeist on the switch-in and tricking them a band which basically cripples them for the rest of the game. Meteor Mash and Bullet Punch are necessary spammable STAB. It's a toss up between EQ and Zen, Zen is mostly only for Machoke though.
If you don't wanna fool around with Trick then Pursuit is really nice for Mime, Grumpig or something else you want whittled or dead. Explosion gives you immediate momentum and basically kills whatever doesn't resist it.
The EVs are somewhat random but outspeed minimum speed Roselia.