Okay, let's make a start :
Normal : Pidove. I don't like it. Simple as that.
Fire : Slugma. Ewww...
Grass : Paras/ It gives me the creeps.
Water : None as of now.
Electric : Emolga. It IS a cutie, but it's damn annoying and always comes out instead of Audino... xD
Bug : Kricketune. It's ugly.
Fighting : Medicham. I never liked it.
Ground : Stunfisk NEVER! Instead... Gligar.
Psychic : Woobat. It's one-eyed, so it's like a furry little Cyclops.
Rock : Shuckle. I hated that thing.
Flying : Woobat. I rest my case.
Dark : Honchcrow had bad looks according to me.
Poison : Venipede. Due to personal revenge purposes.
Steel : Forretress. That ugly thing.
Ghost : Sabeleye. Why didn't it have an evolution? Waste of a good typing.
Ice : Snover. Due to personal revenge purposes.
Dragon : Druddigon. Hate that creature.