Well, the Pokémon games have no knowledge of Smogon tiers, so there's no such thing as "UU" in Battle Spot. Secondly, no Pokémon in the Smogon UU tier are banned in Battle Spot, so I'm not sure what you mean. Did you mean _Ubers_?
The only Pokémon banned in Battle Spot are Mythical Pokémon – the cover legendaries, Mewtwo, event Pokémon, etcetera.