Besides the obvious choices like Zubat and Tentacool, my least favorite wild Pokemon has to be Beldum. The wild Pokemon is encountered in DPPt in a sandstorm route during a swarm. All it knows is Take Down and it has a catch rate of 3 which is equivalent to Mewtwo and Lugia.
Basically, you will be throwing a lot of Pokeballs at it while it will slowly kill itself with Take Down.
Basically, you will be throwing a lot of Pokeballs at it while it will slowly kill itself with Take Down.