So I was looking at the rules of this tournament this is what I have found: Battle Format: Rotation Battle Rankings will be decided based on player Ratings at the end of the competition. Players may use Pokémon found in the Pokémon Black Version 2 or Pokémon White Version 2 National Pokédex, from No. 001–649. The following Pokémon cannot be used in this competition: Chatot Pokémon may not hold the item Soul Dew. Pokémon cannot use the move Sky Drop or Dark Void during battle.
So there is no Item Clause (just to make sure)?
The Official Interceptor of the Duodecim Boards The Official Zangoose of the Pokemon B/W 2 and Pokemon X boards