Onix is a Rock and Ground type Pokémon.

What are Onix's base stats?

HP 35, Attack 45, Defense 160, Sp. Attack 30, Sp. Defense 45, Speed 70. That is a base stat total of 385.

What is Onix weak to?

Onix takes extra damage from Fighting, Grass, Ground, Ice, Steel and Water moves. It is immune to Electric.

What abilities does Onix have?

Onix can have Rock Head, Sturdy and Weak Armor. Its hidden ability is Weak Armor.

What moves does Onix learn?

Onix learns 18 moves by levelling up and 40 by TM.

Onix

No. 0095

Type: Rock / Ground

This chain of immense stones resembles a giant serpent. Tremors shake the earth above as it burrows deep beneath the ground, feeding on boulders as it goes.

Base stats

HP	35
Attack	45
Defense	160
Sp. Attack	30
Sp. Defense	45
Speed	70

Total 385

What to answer with

Attacking types that hit what hits it hard, and the best move of each one it learns.

Fire — Cover 3 weaknesses (Grass, Ice, Steel) — It learns nothing of that type
Flying — Cover 2 weaknesses (Grass, Fighting) — It learns nothing of that type
Grass — Cover 2 weaknesses (Water, Ground) — It learns nothing of that type
Ice — Cover 2 weaknesses (Grass, Ground) — It learns nothing of that type
Fighting — Cover 2 weaknesses (Ice, Steel) — Body Press
Bug — Covers 1 weakness (Grass) — It learns nothing of that type

Abilities

Evolution line

Moves

What the optimizer would run

Rules: Gen 9 OU (singles)

Role: Hazard setter
Ability: Rock Head
Item: Leftovers
Nature: Impish
EVs: 252 HP / 4 Def / 252 SpD
Moves: Body Press, Stealth Rock, Bulldoze, Head Smash