Metamons
Onix official artwork
RockGround

#0095

Rock Snake Pokémon

Onix

Height8.8 m
Weight210.0 kg
Base Exp77
BST385

MetaMons competitive notes

Onix is a rock/ground-type Pokémon whose base stats lean toward Defense — at 385 BST it is a low total for competitive play, with mid-pack speed (base 70) and a mixed attacking profile. Its Rock Head ability matters more than the raw numbers when it hits the field: check what it does before deciding between a sweeper, pivot, or support role for Onix. Build around what Onix actually threatens, not its in-game lore — start from its weaknesses and strongest STAB moves, then decide whether its Speed, bulk, or coverage justifies a team slot.

Base Stats
HP
35
Atk
45
Def
160
SpA
30
SpD
45
Spe
70
BST
385
Type Defenses

Damage multipliers when attacked by each type

Normal½×
Fire½×
Water
Electric
Grass
Ice
Fighting
Poison¼×
Ground
Flying½×
Psychic
Bug
Rock½×
Ghost
Dragon
Dark
Steel
Fairy
View Onix weakness & counters
Evolution Chain
Move Learnset
Onix competitive profile

A MetaMons teambuilding read based on base stats and typing

Onix takes super-effective damage from Water, Grass, Ice, Fighting, Ground, Steel moves — every one of those types is a check you need an answer for when drafting. Before locking Onix into a team, check the weakness guide and count how many of those types your remaining five slots can answer.

Highest stat
Defense (160)
Lowest stat
Special Attack (30)
Offensive lean
mixed
Speed tier
mid-pack speed (base 70)
BST
385 (low for the format)

Onix is a rock/ground-type Pokémon whose base stats lean toward Defense — at 385 BST it is a low total for competitive play, with mid-pack speed (base 70) and a mixed attacking profile. Its Rock Head ability matters more than the raw numbers when it hits the field: check what it does before deciding between a sweeper, pivot, or support role for Onix. Build around what Onix actually threatens, not its in-game lore — start from its weaknesses and strongest STAB moves, then decide whether its Speed, bulk, or coverage justifies a team slot. Compare this profile against your roster's shared weaknesses in the MetaMons team builder, where the 18-type coverage heatmap reads the whole team, not one slot.

About Onix

Onix is the Rock Snake Pokémon a Rock/Ground type Pokémon. It has a base stat total of 385 with Rock Head or Sturdy as abilities.

What is Onix weak to?

Onix is a Rock/Ground-type, so it takes super-effective damage from Water, Grass, Ice, Fighting, Ground, Steel. It resists Poison, Normal, Fire, Flying, Rock. It is immune to Electric.

See Onix's full weakness guide — every type matchup, damage multipliers, and the best Onix counters.

How to counter Onix

To counter Onix in competitive play, bring Pokémon that can hit back with Water or Grass or Ice or Fighting or Ground or Steel moves and can withstand its Rock/Ground STAB attacks. Check the type-defense grid above for the full multiplier breakdown.

Using Onix in competitive teams

Onix can be added to Smogon or VGC teams across Gen 1–9 formats. Build a competitive team with Onix on Metamons and get AI reads on your type coverage and threats before you queue.