Another Curse Set.
Credit to my friend for this set.
Muk-Alola @ Aguav Berry
EVs: 252 HP / 68 Def / 188 SpD
- Poison Jab / Ice Punch / Fire Punch
- Knock Off
252 HP / 188 SpD EVs with Careful Nature allow Muk to take hits from Manectric-Mega, Latias, Hydreigon etc. Only 68 Def EVs because Muk is using Curse, Curse boosts Atk and Def by 1 stage, lowers Speed by 1 stage. Negative Speed doesn't matter, Muk' s speed is already very slow. Def boost allows Muk to take hits from Scizor, Mega-Aerodactyl, Mega-Aggron, Mega Beedrill and KO it with Fire Punch / Ice Punch. Curse also raises Atk, letting Muk to sweep. Knock off removes items from Gliscor, Breloom, Crawdaunt, Latias. Poison Jab is a strong STAB and it has 30% chances of poisoning the target. Poison Jab hits Mega Sceptile, Serperior, Mega Altaria, Primarina, Togekiss and Sylveon. Btw, Ice Punch can also got Mega-Sceptile, Serperior, Altaria-Mega and Togekiss. Fire Punch hits Klefki and Scizor.
Aguav Berry restores HP by 50% at 1/2 max HP or less. 1/2 instead of 1/4 because of Gluttony.
Gluttony allows Muk to eat certain berries early when Mum has 1/2 or less HP. This is a great way for healing early.
Recycle restores Aguav Berry if Muk has used it. Letting Muk to use Curse, and Some curse make Muk very bulky Pokemon.
Then use Recycle again, heal Muk and use Curse. Use Curse until Muk is going to be fainted, or its Atk and Def is at 6 stages already.
Then try to sweep everything with Knock Off and Poison Jab / Ice Punch / Fire Punch.