Graveler, Kadabra, Swoobat/Woobat, and Slaking all disgust me design-wise. If we're talking unappealing in the just-as-a-pokemon sense, I literally forgot Mothim existed until I replayed Eternal X for a Nuzlocke, so I guess I'll mention him. Oh, also Throh and Sawk, I'm not a huge fan of the Spider-Man martial arts thing.