Doesn't matter if you're not in the DP forums, if you want a battle, use the battle thread. If you want to trade, use the trade thread. Creating duplicate threads is not allowed, so please refrain from doing so.
Again, sorry to say, but that doesn't matter. You still need to use those threads, rather than create duplicate ones. It's not very hard, lol. More people browse the DP forums than the DS forums anyways.