At 385 BST, Onix is firmly in pre-evolution territory. Evolve it into Steelix before bringing it to any serious fight.

What is Onix weak to?

In Black 2 & White 2, watch for Starmie (Water), Exeggutor (Grass), and Cloyster (Ice) when using Onix. They all hit it super-effectively with STAB. Starmie is the most dangerous since Water moves deal 4x damage. Fighting, Ground, and Steel-type attackers are also a problem. With 6 weakness types, most competitive teams carry at least one counter.

What is the best ability for Onix?

Rock Head protects against recoil damage. That's the one you want on Onix. Weak Armor is the hidden ability. Niche, but it has its uses. Sturdy works too if your team needs something different.

What role does Onix play in battle?

Onix is a physical attacker with base 45 Attack. Enough bulk to take a hit or two, too. Speed tells the real story. Base 70 Speed is workable. Faster than some, slower than many.

In Black 2 & White 2, For a casual playthrough, Onix works as a placeholder. Rock/Ground coverage is useful early. The real payoff is Steelix . That's where the stats start mattering.

Onix - Weakness, Evolution, Moveset, EVs & Stats

Physical

Balanced

CTier

70Speed · Below Avg

Stats & Training

The stat bars tell the story: Defense carries everything and Sp. Atk's dead weight. But this Rock Snake Pokemon still yields 1 Defense EV per fight on a medium-fast 1M XP curve.

Base Stats

Avg

HP35

Attack45

Defense160

Sp. Atk30

Sp. Def45

Speed70

Total385

Details

Catch Rate

Challenging45 / 255

Growth Rate

Medium Fast1M XP

Height8.8 m

Weight210.0 kg

Base XP77

Abilities

Rock Head

Protects against recoil damage.

SturdyTop Pick

Prevents being KOed from full HP, leaving 1 HP instead. Protects against the one-hit KO moves regardless of HP.

Weak ArmorHA

Raises Speed and lowers Defense by one stage each upon being hit by a physical move.

EV Yield

HPAtkDef+1SpASpDSpe

Defense training source

Pokedex Entries

Opening its large mouth, it ingests massive amounts of soil and creates long tunnels.

Onix Weakness

Onix's Rock/Ground typing leaves it vulnerable to Water, Grass, Ice, Fighting, Ground, and Steel. Water and Grass hits land at 4x, so they're the biggest threat. It shrugs off Electric-type attacks completely. The Rock/Ground typing picks up 5 resistances to work with. Onix's physical bulk (base 160 Def) helps cushion physical weakness hits, but special attackers are the bigger threat.

Onix Weakness and Resistance Chart
Damage	Types
4x (Critical)	Water, Grass
2x (Weak)	Ice, Fighting, Ground, Steel
0.5x (Resist)	Normal, Fire, Flying, Rock
0.25x (Resist)	Poison
0x (Immune)	Electric

Type ChartFragile

6Weak

5Resist

1Immune

Score-7

Gen V Type Chart

Fairy type does not exist — Dragon has fewer checks
Physical / Special split now per-move (introduced Gen IV)

4xCritical

Water Grass

2xWeak

Ice Fighting Ground Steel

½xResist

Normal Fire Flying Rock

¼xResist

Poison

0xImmune

Electric

STAB (8)

Fire Ice Flying Bug Electric Poison Rock Steel

How to Beat Onix in Black 2 & White 2 (Best Counters)

Virizion GrassFighting	C
Obtain MethodRoute 11 Interact Encounter Available Moves Moves Sacred SwordLv. 42 Energy BallTM53 Giga DrainLv. 37 Magical LeafLv. 13 Damage vs Onix Sacred Sword 2x 60-71% Energy Ball 4x 319-376%KO Giga Drain 4x 264-311%KO Magical Leaf 4x 213-251%KO View Virizion builds →
Ferroseed GrassSteel	C
Available Moves Moves Energy BallTM53 Iron HeadLv. 43 Mirror ShotLv. 30 Metal ClawLv. 14 Damage vs Onix Energy Ball 4x 129-153%KO Iron Head 2x 35-41% Mirror Shot 2x 48-57% Metal Claw 2x 23-27% View Ferroseed builds →
Tangrowth Grass	C
Available Moves Moves Energy BallTM53 Giga DrainLv. 36 Brick BreakTM31 BulldozeTM78 Damage vs Onix Energy Ball 4x 375-442%KO Giga Drain 4x 315-371%KO Brick Break 2x 36-44% Bulldoze 2x 29-35% View Tangrowth builds →
Leavanny BugGrass	C
Available Moves Moves Leaf StormLv. 50 Leaf BladeLv. 36 Energy BallTM53 Razor LeafLv. 15 Damage vs Onix Leaf Storm 4x 375-442%KO Leaf Blade 4x 134-158%KO Energy Ball 4x 259-305%KO Razor Leaf 4x 83-98% View Leavanny builds →
Whimsicott Grass	C
Available Moves Moves Energy BallTM53 Mega DrainLv. 1 Damage vs Onix Energy Ball 4x 283-333%KO Mega Drain 4x 129-153%KO View Whimsicott builds →

Black 2 & White 2 Evolution

To get Steelix from Onix, you need a trade. The evolution method matters here. The evolved forms gain up to 125 total stats over Onix. View every chain in the Evolution Chart.

How to Evolve

2 Forms

#095Onix

Trade + Metal Coat

#208Steelix

Stat Comparison 2 Stages

Onix

RockGround

Steelix

SteelGround

75+40

ATK

85+40

DEF

160

200+40

SP.ATK

55+25

SP.DEF

65+20

SPE

30-40

BST

385C-Tier

510C-Tier+125

ROLE

Balanced

Trick Room

TYPE

Utility

Physical

Breeding

Easy

Breed Onix easily with 49 breeding partners from the Mineral egg group. Pass egg moves like Block, Defense Curl, Flail and 5 more to offspring.

Egg Groups

Mineral

Gender

♂50.0%♀50.0%

Hatch Time

25 cycles·6,425 steps

Moderate~6 min with Flame Body

Egg Moves

8moves

Breed With (best first)

Black 2 & White 2 Onix Best Moveset

Sturdy isn't flashy, but it matters. Combined with Custapberry for extra utility and max Attack and Speed EVs, Onix fills the hazard lead slot reliably. Jolly nature finishes the spread.

Best Build

Experimental

Physical Stallbreaker

Ability

Sturdy

Item

Custap BerryRECOVERY

Best Nature for Onix

Jolly+SPE

Onix best EVs are Attack and Speed

EVs

Atk

Spe

Physical Stallbreaker Moveset

Stealth RockSTAB
TauntUtility
Dragon Tail
ExplosionCoverage

Recommended Teammates

DusclopsGood

AudinoGood

MarowakGood

Moves

The natural movepool does the job, but Block and Defense Curl from the egg pool give Onix something extra.

Level-Up Moves

Lv 1

Bind

—158520Normal

Lv 1

Harden

———30Normal

Lv 1

Mud Sport

———15Ground

Lv 1

Tackle

D5010035Normal

Lv 4

Curse

C——10Ghost

Lv 7

Rock Throw

—509015Rock

Lv 10

Rage

—2010020Normal

Lv 13

Rock Tomb

—609510Rock

Lv 16

Stealth Rock

S——20Rock

Lv 19

Rock Polish

D——20Rock

Lv 22

Smack Down

—5010015Rock

Lv 25

Dragon Breath

—6010020Dragon

Lv 28

Slam

—807520Normal

Lv 31

Screech

——8540Normal

Lv 34

Rock Slide

B759010Rock

Lv 37

Sand Tomb

—358515Ground

Lv 40

Iron Tail

D1007515Steel

Lv 43

Dig

D8010010Ground

Lv 46

Stone Edge

D100805Rock

Lv 49

Double-Edge

D12010015Normal

Lv 52

Sandstorm

B——10Rock

TM Moves

TM45

Attract

C—10015Normal

TM78

Bulldoze

D6010020Ground

TM28

Dig

D8010010Ground

TM32

Double Team

———15Normal

TM82

Dragon Tail-6

A609010Dragon

TM26

Earthquake

B10010010Ground

TM64

Explosion

A2501005Normal

TM42

Facade

D7010020Normal

TM91

Flash Cannon

D8010010Steel

TM21

Frustration

——10020Normal

TM74

Gyro Ball

D—1005Steel

TM10

Hidden Power

—6010015Normal

TM66

Payback

D5010010Dark

TM17

Protect+4

C——10Normal

TM77

Psych Up

———10Normal

TM44

Rest

C——10Psychic

TM27

Return

D—10020Normal

TM05

Roar-6

C—10020Normal

TM69

Rock Polish

D——20Rock

TM80

Rock Slide

B759010Rock

TM94

Rock Smash

D4010015Fighting

TM39

Rock Tomb

—609510Rock

TM48

Round

—6010015Normal

TM37

Sandstorm

B——10Rock

TM23

Smack Down

—5010015Rock

TM71

Stone Edge

D100805Rock

HM04

Strength

D8010015Normal

TM90

Substitute

C——10Normal

TM11

Sunny Day

C——5Fire

TM87

Swagger

——9015Normal

TM12

Taunt

A—10020Dark

TM41

Torment

——10015Dark

TM06

Toxic

C—9010Poison

Egg Moves

Egg

Block

———5Normal

Egg

Defense Curl

———40Normal

Egg

Flail

——10015Normal

Egg

Heavy Slam

D—10010Steel

Egg

Rock Blast

D259010Rock

Egg

Rock Climb

D908520Normal

Egg

Rollout

—309020Rock

Egg

Stealth Rock

S——20Rock

Tutor Moves

Tut

Tutor

Bind

—158520Normal

Tutor

Block

———5Normal

Tutor

Dragon Pulse

D9010010Dragon

Tutor

Earth Power

D9010010Ground

Tutor

Iron Head

D8010015Steel

Tutor

Iron Tail

D1007515Steel

Tutor

Sleep Talk

D——10Normal

Tutor

Snore

—4010015Normal

Tutor

Stealth Rock

S——20Rock

Transfer Moves

Gen

Gen 4

Ancient Power

D601005Rock

Gen 3

Body Slam

D8510015Normal

Gen 4

Captivate

——10020Normal

Gen 4

Endure+4

D——10Normal

Gen 4

Headbutt

D7010015Normal

Gen 3

Mimic

———10Normal

Gen 4

Mud-Slap

D2010010Ground

Gen 4

Natural Gift

——10015Normal

Gen 4

Secret Power

—7010020Normal

Gen 4

Twister

—4010020Dragon

Black 2 & White 2 Onix Locations

54 encounter spots for Onix at decent spawn rates starting from mid-game routes. Best and Earliest sort options below help narrow down your approach based on odds vs. Accessibility.

Best Locations to Catch Onix in Black 2 & White 2

You can catch Onix through 54 walking encounters from Lv. 16-57, but availability differs between Black 2 and White 2. Some spots are exclusive to one version.

Relic Passage - Room 3

Black 2Grass Lv.16 Cave

UncommonMid

AnyShaking spot

Relic Passage - Room 3

White 2Grass Lv.16 Cave

UncommonMid

AnyShaking spot

Relic Passage - Room 1

Black 2Grass Lv.27 Cave

UncommonMid

AnyShaking spot

Relic Passage - Room 1

White 2Grass Lv.27 Cave

UncommonMid

AnyShaking spot

Relic Passage - Room 2

Black 2Grass Lv.27 Cave

UncommonMid

AnyShaking spot

Relic Passage - Room 2

White 2Grass Lv.27 Cave

UncommonMid

AnyShaking spot

Relic Passage - Room 3

Black 2Grass Lv.18 Cave

RareMid

Any

Relic Passage - Room 3

White 2Grass Lv.18 Cave

RareMid

Any

Relic Passage - Room 1

White 2Grass Lv.30 Cave

RareMid

Any

Relic Passage - Room 1

Black 2Grass Lv.30 Cave

RareMid

Any

Relic Passage - Room 2

Black 2Grass Lv.30 Cave

RareMid

Any

Relic Passage - Room 2

White 2Grass Lv.30 Cave

RareMid

Any

Victory Road - 2F

White 2Grass Lv.41 Cave

UncommonLate

AnyShaking spot

Victory Road - 2F

Black 2Grass Lv.41 Cave

UncommonLate

AnyShaking spot

Victory Road - 2F

Black 2Grass Lv.43-44 Cave

UncommonLate

Any

Victory Road - 2F

White 2Grass Lv.43-44 Cave

UncommonLate

Any

Victory Road - 4F

White 2Grass Lv.47 Cave

UncommonPost

AnyShaking spot

Victory Road - 4F

Black 2Grass Lv.47 Cave

UncommonPost

AnyShaking spot

Victory Road - N's Castle

White 2Grass Lv.47 Cave

UncommonPost

AnyShaking spot

Victory Road - N's Castle

Black 2Grass Lv.47 Cave

UncommonPost

AnyShaking spot

Victory Road - 4F

White 2Grass Lv.49-50 Cave

UncommonPost

Any

Victory Road - 4F

Black 2Grass Lv.49-50 Cave

UncommonPost

Any

Clay Tunnel - Room 1

Black 2Grass Lv.54 Cave

UncommonPost

AnyShaking spot

Clay Tunnel - Room 1

White 2Grass Lv.54 Cave

UncommonPost

AnyShaking spot

Clay Tunnel - Room 2

White 2Grass Lv.54 Cave

UncommonPost

AnyShaking spot

Clay Tunnel - Room 2

Black 2Grass Lv.54 Cave

UncommonPost

AnyShaking spot

Clay Tunnel - Room 3

White 2Grass Lv.54 Cave

UncommonPost

AnyShaking spot

Clay Tunnel - Room 3

Black 2Grass Lv.54 Cave

UncommonPost

AnyShaking spot

Twist Mountain - 1F

White 2Grass Lv.54 Cave

UncommonPost

AnyShaking spot

Twist Mountain - 1F

Black 2Grass Lv.54 Cave

UncommonPost

AnyShaking spot

Twist Mountain - 2F

White 2Grass Lv.54 Cave

UncommonPost

AnyShaking spot

Twist Mountain - 2F

Black 2Grass Lv.54 Cave

UncommonPost

AnyShaking spot

Twist Mountain - 3F

Black 2Grass Lv.54 Cave

UncommonPost

AnyShaking spot

Twist Mountain - 3F

White 2Grass Lv.54 Cave

UncommonPost

AnyShaking spot

Twist Mountain - B1F

Black 2Grass Lv.54 Cave

UncommonPost

AnyShaking spot

Twist Mountain - B1F

White 2Grass Lv.54 Cave

UncommonPost

AnyShaking spot

Underground Ruins - All areas

Black 2Grass Lv.54 Ruins

UncommonPost

AnyShaking spot

Underground Ruins - All areas

White 2Grass Lv.54 Ruins

UncommonPost

AnyShaking spot

Clay Tunnel - Room 1

Black 2Grass Lv.57 Cave

RarePost

Any

Clay Tunnel - Room 1

White 2Grass Lv.57 Cave

RarePost

Any

Clay Tunnel - Room 2

White 2Grass Lv.57 Cave

RarePost

Any

Clay Tunnel - Room 2

Black 2Grass Lv.57 Cave

RarePost

Any

Clay Tunnel - Room 3

White 2Grass Lv.57 Cave

RarePost

Any

Clay Tunnel - Room 3

Black 2Grass Lv.57 Cave

RarePost

Any

Twist Mountain - 1F

White 2Grass Lv.57 Cave

RarePost

Any

Twist Mountain - 1F

Black 2Grass Lv.57 Cave

RarePost

Any

Twist Mountain - 2F

White 2Grass Lv.57 Cave

RarePost

Any

Twist Mountain - 2F

Black 2Grass Lv.57 Cave

RarePost

Any

Twist Mountain - 3F

White 2Grass Lv.57 Cave

RarePost

Any

Twist Mountain - 3F

Black 2Grass Lv.57 Cave

RarePost

Any

Twist Mountain - B1F

Black 2Grass Lv.57 Cave

RarePost

Any

Twist Mountain - B1F

White 2Grass Lv.57 Cave

RarePost

Any

Underground Ruins - All areas

Black 2Grass Lv.57 Ruins

RarePost

Any

Underground Ruins - All areas

White 2Grass Lv.57 Ruins

RarePost

Any

Onix Guide

At 385 BST, Onix is firmly in pre-evolution territory. Evolve it into Steelix before bringing it to any serious fight.
In Black 2 & White 2, watch for Starmie (Water), Exeggutor (Grass), and Cloyster (Ice) when using Onix. They all hit it super-effectively with STAB. Starmie is the most dangerous since Water moves deal 4x damage. Fighting, Ground, and Steel-type attackers are also a problem. With 6 weakness types, most competitive teams carry at least one counter.
Rock Head protects against recoil damage. That's the one you want on Onix. Weak Armor is the hidden ability. Niche, but it has its uses. Sturdy works too if your team needs something different.
Onix is a physical attacker with base 45 Attack. Enough bulk to take a hit or two, too. Speed tells the real story. Base 70 Speed is workable. Faster than some, slower than many.
In Black 2 & White 2, For a casual playthrough, Onix works as a placeholder. Rock/Ground coverage is useful early. The real payoff is Steelix. That's where the stats start mattering.

Game Availability

Present since Red & Blue, Onix appears in 21 games spanning 10 generations. Gen 1 originals like Onix have the longest track record of availability in the series.

Click a game to view version-specific details

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Snivy Grass	D
Obtain MethodAspertia City Gift TM Move Moves Energy BallTM53 Damage vs Onix Energy Ball 4x 225-270%KO View Snivy builds →
Oshawott Water	D
Obtain MethodAspertia City Gift Upcoming Move Moves Water GunLv. 7 Learns Water Gun at Level 7 View Oshawott builds →

Sewaddle BugGrass	D
TM Move Moves Energy BallTM53 Damage vs Onix Energy Ball 4x 187-221%KO View Sewaddle builds →
Snivy Grass	D
Obtain MethodAspertia City Gift Available Moves Moves Energy BallTM53 Vine WhipLv. 7 Damage vs Onix Energy Ball 4x 187-221%KO Vine Whip 4x 53-63% View Snivy builds →
Sunkern Grass	D
Available Moves Moves Energy BallTM53 Mega DrainLv. 10 AbsorbLv. 1 Damage vs Onix Energy Ball 4x 161-189%KO Mega Drain 4x 79-95% Absorb 4x 53-63% View Sunkern builds →
Psyduck Water	D
Available Moves Moves Water GunLv. 8 Rock SmashTM94 Damage vs Onix Water Gun 4x 118-142%KO Rock Smash 2x 16-21% View Psyduck builds →
Oshawott Water	D
Obtain MethodAspertia City Gift Available Moves Moves Water GunLv. 7 Rock SmashTM94 Damage vs Onix Water Gun 4x 105-126%KO Rock Smash 2x 16-21% View Oshawott builds →

Whimsicott Grass	C
Available Moves Moves Energy BallTM53 Mega DrainLv. 1 Damage vs Onix Energy Ball 4x 275-325%KO Mega Drain 4x 127-150%KO View Whimsicott builds →
Lilligant Grass	C
Available Moves Moves Energy BallTM53 Mega DrainLv. 1 Damage vs Onix Energy Ball 4x 350-413%KO Mega Drain 4x 158-188%KO View Lilligant builds →
Sewaddle BugGrass	D
Available Moves Moves Energy BallTM53 Razor LeafLv. 15 Damage vs Onix Energy Ball 4x 179-213%KO Razor Leaf 4x 63-75% View Sewaddle builds →
Snivy Grass	D
Obtain MethodAspertia City Gift Available Moves Moves Energy BallTM53 Leaf TornadoLv. 16 Vine WhipLv. 7 Damage vs Onix Energy Ball 4x 190-225%KO Leaf Tornado 4x 138-163%KO Vine Whip 4x 52-63% View Snivy builds →
Sunkern Grass	D
Available Moves Moves Energy BallTM53 Razor LeafLv. 16 Mega DrainLv. 10 AbsorbLv. 1 Damage vs Onix Energy Ball 4x 158-188%KO Razor Leaf 4x 52-63% Mega Drain 4x 73-88% Absorb 4x 42-50% View Sunkern builds →

Whimsicott Grass	C
Available Moves Moves Energy BallTM53 Mega DrainLv. 1 Damage vs Onix Energy Ball 4x 276-326%KO Mega Drain 4x 130-154%KO View Whimsicott builds →
Lilligant Grass	C
Available Moves Moves Energy BallTM53 Mega DrainLv. 1 Damage vs Onix Energy Ball 4x 371-437%KO Mega Drain 4x 167-197%KO View Lilligant builds →
Maractus Grass	C
Available Moves Moves Energy BallTM53 Giga DrainLv. 26 Needle ArmLv. 22 Mega DrainLv. 13 Damage vs Onix Energy Ball 4x 356-420%KO Giga Drain 4x 299-351%KO Needle Arm 4x 80-94% Mega Drain 4x 167-197%KO View Maractus builds →
Sewaddle BugGrass	D
Available Moves Moves Energy BallTM53 Razor LeafLv. 15 Damage vs Onix Energy Ball 4x 181-214%KO Razor Leaf 4x 57-69% View Sewaddle builds →
Snivy Grass	D
Obtain MethodAspertia City Gift Available Moves Moves Leaf BladeLv. 28 Energy BallTM53 Leaf TornadoLv. 16 Vine WhipLv. 7 Damage vs Onix Leaf Blade 4x 80-94% Energy Ball 4x 196-231%KO Leaf Tornado 4x 146-171%KO Vine Whip 4x 43-51% View Snivy builds →

Leavanny BugGrass	C
Available Moves Moves Energy BallTM53 Razor LeafLv. 15 Damage vs Onix Energy Ball 4x 247-292%KO Razor Leaf 4x 85-100%KO View Leavanny builds →
Whimsicott Grass	C
Available Moves Moves Energy BallTM53 Mega DrainLv. 1 Damage vs Onix Energy Ball 4x 268-315%KO Mega Drain 4x 123-146%KO View Whimsicott builds →
Lilligant Grass	C
Available Moves Moves Energy BallTM53 Mega DrainLv. 1 Damage vs Onix Energy Ball 4x 353-415%KO Mega Drain 4x 163-192%KO View Lilligant builds →
Maractus Grass	C
Available Moves Moves Energy BallTM53 Giga DrainLv. 26 Needle ArmLv. 22 Mega DrainLv. 13 Damage vs Onix Energy Ball 4x 346-408%KO Giga Drain 4x 287-338%KO Needle Arm 4x 78-92% Mega Drain 4x 156-185%KO View Maractus builds →
Pansage Grass	D
Available Moves Moves Energy BallTM53 Seed BombLv. 22 DigTM28 Vine WhipLv. 10 Damage vs Onix Energy Ball 4x 203-238%KO Seed Bomb 4x 72-85% Dig 2x 23-28% Vine Whip 4x 45-54% View Pansage builds →

Excadrill GroundSteel	A
Recommended Build AbilitySandforce ItemChoice Scarf NatureJolly Moves EarthquakeSTAB Rapid Spin Iron Head Rock Slide Damage vs Onix Earthquake 2x 107-127%KO Rapid Spin 9-10% Rock Slide 13-16% View Excadrill builds →
Jirachi SteelPsychic	A
Recommended Build AbilitySerenegrace ItemLeftovers NatureCareful Moves Iron Head U Turn Ice Punch Healing Wish Damage vs Onix U Turn 16-19% View Jirachi builds →
Politoed Water	B
Recommended Build AbilityDrizzle ItemLeftovers NatureBold Moves ScaldSTAB EncoreUtility ProtectPriority ToxicUtility Damage vs Onix Scald 4x 282-333%KO View Politoed builds →
Conkeldurr Fighting	B
Recommended Build AbilityGuts ItemLeftovers NatureAdamant Moves Drain Punch Mach Punch Ice Punch Thunder Punch Damage vs Onix Drain Punch 2x 91-107%KO Mach Punch 2x 49-58% View Conkeldurr builds →
Breloom GrassFighting	B
Recommended Build AbilityTechnician ItemLife Orb NatureAdamant Moves Mach Punch Bullet Seed Swords Dance Low Sweep Damage vs Onix Mach Punch 2x 61-72% Bullet Seed 4x 78-92% View Breloom builds →