I like the idea of Tech Weavile and Simple Whiscash, I really do. Tech Weavile needs to happen!
Anyway, how about Flygon with Tinted Lens, Quiver Dance + Dragon Dance? All three make perfect sense.
I'm not understanding Quiver Dance on Flygon, but otherwise it does seem logical. If Levitate Pokemon has Dream World abilities, I'm certain that it would have Tinted Lens, which would give it a Niche over Salamence, and with Dragon Dance, it could have had a niche over Garchomp.
But flygon already has perfect coverage in three moves(dragon/ground/fire).
I would say that ferrothorn should get rapid spin.It looks like a poke who can spin and he can easily come in against bulky waters and spin the hazards away.
And he can also beat jellicent and gengar if he uses power whip on the switch.
Starmie should get Regenerator.Then a trick set would be especially deadly, as long as one can keep pursuit users at bay.
The Levitate ability, along with Angad's suggestion of Stealth Rock, would allow Golurk to check the most powerful rapid spinner, Excadrill, and set up Stealth Rock on its own. With those changes, I could definitely see Golurk being one of the most viable spinblockers in OU.
That would be a better ability than Klutz.
I do agree with Ferrothorn getting Rapid Spin, C'mon, Ferroseed's sprite is clearly spinning in its animation!
I'm wondering what would've happened if Explosion hadn't been nerfed.
Ferrothorn getting Rapid Spin would probably lower Starmie and Forretress usage.
Well, Ferrothorn can hit the some predominately OU ghosts rather hard with Gyro Ball for Gengar, and Power Whip for Jellicent, although with Rapid Spin, it would likely have to sacrifice one of the moves for it.
I would say it would also increase the usage of Fire attacks, but lets be honest I don't think they can increase any more xD
Regigigas would be interesting with Rest and/or Protect. I was having this discussion with Blitzle, but I really don't think he would be overpowered in today's game. The most 'centralizing' he would do would be ensure that most people run powerful Fighting types or appropriate phazers. I would have to do a calc, but I would think something like Mienshao HJK would be sufficient to take him out. Protect would let him get past slow start sometimes, but that makes him setup bait if he does it too predictably. There is also Skarmory to phaze in OU (Fire Punch won't do that much until he gets his full Attack stat).
Tinted Lens Flygon would actually be pretty fearsome (I won't even think about Dragon Dance + Tinted Lens, that would be unstoppable outside of Ice priority/Scarfed Ice moves). Beyond revenge killing it, it's pretty hard to tank unresisted CB Outrage or CSpecs Draco Meteor. Outrage has a decent chance to 2HKO physically defensive Skarm after SR (45.8%-53.9%). Draco Meteor would do 57.4-67.6% to standard Ferrothorn. Not a 2HKO without significant hazard damage, but can definitely wear it down. Of course, on the specs set you could try to use your Fire move to kill him anyway, or forego the Specs. Life Orb Modest Flygon would do 49.4-58.2% with Draco Meteor. You could easily 2HKO with the following Fire Blast.
Still, it's a shame that Regigigas had to be denied Rest and Protect. Slow Start is more than enough to keep this golem king from being broken; Game Freak tried way too hard to keep it down.
By the way, I was thinking a little more about Huge Power Slaking. That thing is hilarious. Nothing can avoid a 2HKO from Choice Band Return except Rock/Steel types and Steelix with Defense investment (Standard Steelix with 252 HP / 252 SpD will be 2HKO'd).
Huge Power Slaking would make the ultimate Choice Scarf revenge-killer and the ultimate Choice Band wall-smasher. No doubt it'd be Uber. XD