And now for something completely different:
Kingdra @ Life Orb
Swift Swim
Modest 4/0/0/252/0/252
- Draco Meteor
- Hydro Pump / Surf
- Hidden Power Fire
- Rain Dance
Although you can't use Kingdra on Drizzle teams, it is an effective answer to rain offense, outspeeding a good chunk of their frailer mons in rain and possibly forcing them to burn Thundurus's Thunder Wave or Tornadus's Tailwind earlier than they'd like to. It also does well against sun and sand teams, as none of them enjoy having to deal with this thing in rain, and robbing Excadrill of its Sand Rush can change the course of the game (not that Kingdra can actually Rain Dance in front of Excadrill and instead has to use Rain Dance before Excadrill can get in, so you'd still need an actual way to handle Excadrill, but you get the point.). Hidden Power Fire is for nailing Ferrothorn and Genesect outside of rain. It's quite good on sun teams, where the power boost to Hidden Power Fire is certainly noticeable and Kingdra can throw your opponent for a bit of a loop if it gets a Rain Dance off after dispatching Ferrothorn, etc with it. It's replaceable with Dragon Pulse or Surf, whichever suits your needs.