Even Fluttershy couldn't understand it, when she was here. I've never encountered something which could talk that she couldn't understand. I think Bracer might sort of be able to, but that's about as close as I get.

[Robo is basically a wannabe shounen hero in the body of a robot ghost. He's fairly easy to understand, but you might not want to.]

Well if you're going to start at level one, you more or less have to get bred ones. I don't think even the Pokemon on Route 29 are level one.