Hello!.
First of all I'm making this suggestion because I'm the kind of person that likes to help people evolve their pokemons via trade when they need to, like for example, onix, seadra, etc. The problem comes when most of them don't trust traders because they might get scammed, and there is a good logic behind it, trusting people online with stuff you worked hard for is not always the best idea.
¿Could there be a way in the forum or ingame that after a trade makes a window appear to rate the trader with a + or a -?
Obviously this reputation would be shown when someone inspects you, or you can aswell share them your forum profile to show them your trade rep.
This would help people not look for a mod or GM everytime they want to trade and a way to feel more secure when they trade with someone with a good reputation.