
Originally Posted by
Zhanton
Just nitpicking off Shine's rate, Stoutland wants Fire Fang > either Thunder Fang or Ice Fang as a way to hit Steel-types.
At the moment your team is quite physically oriented and you don't have a dedicated special sweeper so I would steer away from Golurk. I'm not too keen on Volcarona or Kyurem either as they add a third Rock-type weakness to your team, but if you still want to use Volcarona:
Volcarona @ Leftovers
~ Substitute
~ Quiver Dance
~ Fiery Dance
~ Bug Buzz
Quiver Dance is an amazing set-up move, definitely one of the best there are. +1 SpA, +1 SpD and +1 Spe is amazing, especially on an already strong Pokemon like Volcarona. Fiery Dance is your Fire-type move of choice, being reliable and strong and also coming with the possibility of boosting your Special Attack further. Bug Buzz as a reliable secondary STAB attack. After a few Quiver Dances, you don't really need any other attacks apart from Fiery Dance and Bug Buzz, so it's a wise move to go with Substitute; this allows you to set up Quiver Dances more easily, in turn giving you a better chance of sweeping. Leftovers is the best item for this set, keeping Volcarona's HP replenished, which definitely helps after a Substitute or two.
I'd also like to suggest a different Quiver Dance sweeper which I feel fits in better with your team as it doesn't make your team extremely weak to a certain type of move.
Lilligant @ Leftovers
Own Tempo
~ Quiver Dance
~ Sleep Powder
~ Leech Seed / Hidden Power [Fire] / Hidden Power [Rock]
~ Petal Dance / Giga Drain
Meet Lilligant. It's not naturally available in Black, but you can trade a Cottonee for a Petilil somewhere early on in the game. Again, Quiver Dance is a stunning move, boosting Lilligant's Special Attack, Special Defence and Speed all by one stage. Sleep Powder helps you to set up Quiver Dances. Leech Seed can also be used to help with setting up, as it replenishes your HP. Alternatively, you can go with Hidden Power [Fire] or [Rock] which get some important coverage for Lilligant. That said, from my personal experience, after a few Quiver Dances Lilligant is strong enough with just a STAB move. You have two choices here. You can either go with the powerful Petal Dance; this move normally carries the side-effect of confusion after a few turns, but thanks to Lilligant's Own Tempo ability, which prevents confusion, this won't be the case. After a few Quiver Dances, Petal Dance allows Lilligant to hit like a truck and decimate any opposition. On the other hand, you could go with Giga Drain which isn't as strong as Petal Dance, but helps you to heal your HP further. Leftovers is your item here again to continually replenish Lilligant's HP, allowing it to boost more and sweep for longer.
I hope this helps! If you need any more help, just let us know.