Alright, I do believe I have a spiritomb on my original pokemon Black game but as far as the sequels go, I just started the game so I do not have that many pokemon at all. Any pokemon is fine with me, so surprise me (:
I've gone ahead and used cloning codes on Pokémon (subsequently sent away) to give myself a large number of each type of Stone, held when the Pokémon was cloned. Thus, I have a spare Fire Stone I can give you as a freebie.
If there were anything I'd be seeking, it would be either a Seedot or a Snorunt. or even a Spiritomb (that one is most of interest in fact as it's a very hard one to come by, related to the Hallowed Tower). Barring those, this will likely be a freebie. (If you have Spiritomb, I'd be happy to clone it and send the original back, too; that will be a pain to get until I get there in W2.)
Since I have to send a Pokémon holding the stone, is there anything you'd like me to breed to send the stone with? If you have B2, I can breed Solosis or Rufflet; if you have W2, I already have a Gothita and Vullaby on standby (both with Egg Moves, Miracle Eye for Gothita and Roost for Vullaby, which also knows Air Slash already).
If you can stick around right now for a bit, I can send it this afternoon, right now.