Alolan Muk

Alolan Muk gained a Dark typing and psychedelic colors over its prolonged separation from Kanto, but what did it gain in Pokemon GO viability? Not a whole lot. Its attack is too low to be a great choice in raids, and its fairly low bulk makes it a less than ideal choice for defense despite the fact that Ground is its only weakness. 

Best PvE Offensive Moveset

• Poison Jab should be paired with Gunk Shot. This set is better against neutral targets. Plus, Gunk Shot has the added bonus of throwing a garbage can.

• Bite should be paired with Dark Pulse. This set is better against targets weak to Dark.

• Snarl is just ever so slightly slightly weaker than Bite, and harder to dodge with too. Stick with Bite if you use Alolan Muk as a Dark type attacker

• Sludge Wave is strictly inferior to Gunk Shot, having worse power and no garbage can.

• Acid Spray is a terrible move in raids and also has no garbage can.

Best PvE Defensive Moveset

• Snarl is the preferred fast move on defense, having higher damage and energy gains, while also hitting Metagross pretty hard.

• Poison Jab is slightly weaker than Snarl and is double-resisted by Metagross, but has the advantage of off-typing with Dark Pulse and isn’t resisted by Machamp.

• Bite is strictly inferior to Snarl on defense.

• Dark Pulse is the superior defensive charge move, with multiple bars.

• Gunk Shot is strong, and it literally throws a garbage can.

• Sludge Wave is weaker than Gunk Shot, and it has no garbage can.

• Acid Spray is a three-bar move, but its damage is abysmal. Also; no garbage can.

This set offers greater consistent damage than the Snarl set thanks to Poison Jab's fairly high DPT. Dark Pulse is necessary coverage, hitting most Poison-resistant Pokemon for neutral damage. Acid Spray is Alolan Muk's cheapest attack and helps amplify its consistent damage to oppressive levels, especially in more lengthy matchups. It is chosen over Gunk Shot and Sludge Wave as Alolan Muk already deals good enough Poison-type damage, and its ability to debuff through shields is more valuable.

Snarl's great energy generation allows it to leverage a fairly expensive set of charged moves with very solid coverage. Dark Pulse is mandatory as A-Muk's Dark-type move. Sludge Wave and Gunk Shot are both totally viable options for your secondary. Sludge Wave's lower energy cost can make it a little less punishing if it gets shielded and is generally the preferred choice, though Gunk Shot's stronger if it lands (and also has a funny trash can animation).