I have some cornn berries. They're not the greatest, but they're pretty decent. I can give you one, but not till next friday when I go to my mother's house. She has wi-fi. Anyways, Feebas' beauty doesn't have to be at a maxed out 200. It only has to be 170. The reason your Feebas can't eat anymore is because it's sheen is full, isn't it. Yes, this can be a problem when evolving Feebas. What you should do is feed your next Feebas Dry Poffins with low feel. This doesn't increase their Sheen as much, thus making it possible to feed more poffins to Feebas. Then, once your Feebas is full, level it up. If it doesn't work, PM me.