Muk

Muk has probably one of the worst cases of four moveslot syndrome in history. His Poison typing and STAB are rather pitiful; Steel-, Rock-, and Ground-type Pokemon are extremely common in UU and none of them mind it. This means Muk must rely on his big movepool to hurt switch-ins, but the limit of three leftover moveslots hinders him greatly. Explosion is also such a tempting move that it sometimes leaves Muk with only two moves to make up for his bad STAB. His movepool problems aside, Muk is an excellent special tank who can take attacks from the likes of specially oriented Venusaur and Lanturn. Muk's awesome 105 base Attack should not be ignored either, as it allows him to tear massive holes in foes that don't resist his powerful Gunk Shots. Muk may seem lackluster, but he can effectively fill in a variety of roles for your team.