Well, after talk to all people in unova I discovered another guy in accumula town it's the one of the drums in the most upper house with a blank dialogue, but the other two I think they are characters who said only one time a diferent dialogue before you beat the pokemon league, because when I talked with all the people around unova they not appeared again and I don't remember who they are. I'm sorry but that's all the info that I have. Another tiny bug is in the pokemon world tournament in the mix category in the name of your pokemon exchanged a space is missing. Hope you can fix it.