Muk has high CP and work as a tank considering it's high stamina. With Poison Jab and Gunk Shot, Muk will be a good counter against Grass-type or Fairy-type Pokemon.
Muk is weak to Psychic and Ground types, while being resistant to Grass, Fighting, Posion, Bug, and Fairy types.
Best Pokemon to beat Nidoking
Kabuto nests and spawn locations