Yes, Chatot is the only banned Pokemon.
- The only banned Pokemon in this competition is Chatot. That means you can bring all your big strong (legally-obtained) legendaries to play!
- The only banned item is still Soul Dew.
- The only banned moves are Dark Void (you can still use Darkrai, but it may not have this move) and Sky Drop.
- The only requirement for getting into the rankings and earning the participation prize is to complete 1 battle instead of 10.