Alolan Muk with the additional Dark typingis really tasty for a couple of reasons.
First of all, it is a good thing defensively speaking because now Muk is weak only to Ground attacks, but Earthquake is quite predictable.
Poison Touch, even though it isn't as good as Regenerator for an AV pokemon, it is nice when it poisons the foe because some check/counters i.e. Garchomp and Landorus-T don't have reliable recovery, so they dislike having a timer onto themselves. This makes STAB Poison Jab/Gunk Shot even more appealing.
Last, but not least, STAB Knock Off/Pursuit are welcome to punish some monsters unable to kO this rainbow Muk.
First of all, it is a good thing defensively speaking because now Muk is weak only to Ground attacks, but Earthquake is quite predictable.
Poison Touch, even though it isn't as good as Regenerator for an AV pokemon, it is nice when it poisons the foe because some check/counters i.e. Garchomp and Landorus-T don't have reliable recovery, so they dislike having a timer onto themselves. This makes STAB Poison Jab/Gunk Shot even more appealing.
Last, but not least, STAB Knock Off/Pursuit are welcome to punish some monsters unable to kO this rainbow Muk.