Okay so I was thinking up a reason for Rowan to send Amos to Unova. He specializes in evolution, and he's kind of a busy guy. Since he moves around a lot, possibly going to Kanto again, he could send Amos on a long trip so that he doesn't have to find him everytime he's done something. So go research these bug type Pokemon in Unova he heard about. Apparently they only evolve through interaction/trading with each other. Find both and make observations before and after evolution. And you know, observe Pokemon and work on your research skills all along the way, so you're of more use to me when you return. So there we go, let's see how much he accomplishes before he gets completely sidetracked by cultists.