Check: Alolan Marowak
Marowak-Alola @ Thick Club
Ability: Rock Head
EVs: 4 HP / 252 Atk / 252 Spe
Adamant Nature
- Flare Blitz
- Shadow Bone
- Swords Dance
- (some filler, rocks, EQ, etc)
Alolan Marowak takes piss all from any move that Clef can go for, outspeeds, and easily 2HKOes with Flare Blitz. Only thing it doesn't really like is Knock which I've never seen on Clefable, also if you wanted you could use Lightning Rod to be immune to Thunder Wave.
0 SpA Clefable Moonblast vs. 0 HP / 4 SpD Marowak-Alola: 59-69 (22.6 - 26.4%) -- 22.4% chance to 4HKO
+5 0 SpA Clefable Moonblast vs. 0 HP / 4 SpD Marowak-Alola: 204-241 (78.1 - 92.3%) -- guaranteed 2HKO
252+ Atk Thick Club Marowak-Alola Flare Blitz vs. 252 HP / 252+ Def Clefable: 271-321 (68.7 - 81.4%) -- guaranteed 2HKO after Leftovers recovery