As far as I know, I don't think any of the items are banned at the tournament. Once I finish planning a team together, I'll be sure to post it as well. So far all I've planned out is:
252 Spd/252 Atk/4HP (Jolly)
Leftovers? Life Orb? Balloon?
I'm still trying to decide between Ferrothorn, Blissey or Forretress as my defensive wall. (Although I think there's a good chance I'll run Esp's Ferrothorn with Protect instead of Stealth Rock)