Nidoking @ Life Orb / Choice Band
Ability: Sheer Force
EVs: 252 Atk / 4 Def / 252 Spe
Adamant Nature
- Earthquake
- Poison Jab
- Ice Punch
- Megahorn / Superpower / Rock Slide
Earthquake - Reliable STAB, hits 5 types super effectively
Poison Jab - Reliable STAB as well
Ice Punch - Hits annoying Flying-types that are immune to your earthquake
Megahorn / Superpower / Rock Slide - Megahorn and Superpower hit Dark-types, while Rock Slide hits Moltres for 4x super effective damage.
More detailed explanation:
So Nidoking is a full on attacker, with Sheer Force it doesn’t take any damage from the Life Orb, making it a huge threat, also, its base attack is WAAAYYY better than its base Special attack, sitting at only 85, while it’s base attack is 102. Stealth Rock won’t work on this thing, it’s not a tank, that’s more Nidoqueen’s role.
Earthquake hits a lot of things for super effective damage, such as Mega Aggron, Bisharp, Darmanitan, and pretty much everything that’s a Poison-, Steel-, Fire-, Rock-, and Electric-types.
Poison Jab is just reliable STAB, hits Amoongus and Celebi for neutral damage (Earthquake might be a more reliable option, especially on Amoongus).
Ice Punch hits Mega Pigeot and Kommo-o, and hits Amoongus, but again Earthquake is probably better.
Megahorn, high base power, and hits Alolan Muk, but again Earthquake is better, also hits Mega Sharpedo, don’t know why you’d keep Nidoking in against a Mega Sharpedo though.
Superpower another option instead of Megahorn, 100% accurate, but lowers your Attack and Defense after using it, hits against the same Pokémon as Megahorn, but also hits Mamoswine, but Earthquake is better.
Lastly, an alternate option for Megahorn or Superpower, and personally my favorite, Rock Slide, KOes Moltres.
-RainbowSheep
Hope this helped :D