One word: WHISMUR. I hate its creepy eyes and its weird mouth and the way its mouth moves in colosseum. Like some freaky ugly child thing.
It's funny, I find some of the most unattractive Pokemon to be cute. Mr. Mime, Nuzleaf, and Slaking are all fairly adorable. How can you say Jynx is ugly? What is so uglu about her? She's very beautiful. I wish I looked like a Jynx. The regi, how can they be ugly, they have no faces! Machoke isn't one considered ugly because it has such a cute dinosaur face, but it's high on my cuteness meter.