The Rock Snake Pokemon. Rock Head prevents recoil, and trade with Metal Coat evolves it into Steelix for a Steel/Ground tank.
Ability 1Rock HeadAbility 1Protects against recoil damage.Ability 2SturdyAbility 2Prevents being KOed from full HP, leaving 1 HP instead. Protects against the one-hit KO moves regardless of HP.
385HP35Attack45Defense160Speed70Sp.Def45Sp.Atk30
Onix
Steelix
Weak to
Physical
Balanced
70Speed · Below Avg

Is Onix Good in Diamond & Pearl Playthrough?

Cave encounters throughout Sinnoh. Onix evolves into Steelix by trading with Metal Coat. AbilityRock Head removes recoil damage. Even without evolving, Onix helps against Volkner through Ground moves. Steelix turns it into a Steel-type wall.

StrongGoodEvenToughBadGEGEEGGEGEGEGSGERoarkGym 1GardeniaGym 2MayleneGym 3Crasher WakeGym 4FantinaGym 5ByronGym 6CandiceGym 7VolknerGym 8AaronE4BerthaE4FlintE4LucianE4MarsBossJupiterBossSaturnBossCynthiaChamp*
Roark
Gym 1
Good

Steelix has the type edge here and should clean up Roark's team.

You Win
Geodude
Lv 12
RockGround
Rock Head
Stealth RockRock Throw
Even
Onix
Lv 12
RockGround
Rock Head
Stealth RockRock ThrowScreech
You Win
Cranidos
Lv 14
Rock
Mold Breaker
HeadbuttPursuitLeer
Gardenia
Gym 2
Even

Steelix trades roughly evenly with Gardenia's team.

Even
Cherubi
Lv 19
Grass
Chlorophyll
Grass KnotLeech SeedGrowthSafeguard
Even
Turtwig
Lv 19
Grass
Overgrow
Grass KnotRazor LeafWithdrawReflect
Risky
Roserade
Lv 22
GrassPoison
Natural Cure
Grass KnotMagical LeafPoison StingStun Spore
Maylene
Gym 3
Good

Steelix has the type edge here and should clean up Maylene's team.

You Win
Meditite
Lv 27
FightingPsychic
Pure Power
Drain PunchConfusionMeditateDetect
Even
Machoke
Lv 27
Fighting
Guts
Brick BreakRock TombLeerForesight
You Win
Lucario
Lv 30
FightingSteel
Steadfast
Drain PunchForce PalmMetal ClawBone Rush
Crasher Wake
Gym 4
Even

Steelix trades roughly evenly with Crasher Wake's team.

Risky
Gyarados
Lv 27
WaterFlying
Intimidate
BrineDragon RageBiteSwagger
Even
Quagsire
Lv 27
WaterGround
Damp
Mud BombSlamMud SportTail Whip
Even
Floatzel
Lv 30
Water
Swift Swim
BrineIce FangPursuitSwift
Fantina
Gym 5
Even

Steelix trades roughly evenly with Fantina's team.

Even
Drifblim
Lv 32
GhostFlying
Aftermath
Ominous WindGustAstonishMinimize
Even
Gengar
Lv 34
GhostPoison
LevitateImmune to Ground attacks
Shadow ClawPoison JabSpiteConfuse Ray
Risky
Mismagius
Lv 36
Ghost
LevitateImmune to Ground attacks
Shadow BallPsybeamMagical LeafConfuse Ray
Byron
Gym 6
Good

Steelix has the type edge here and should clean up Byron's team.

Risky
Bronzor
Lv 36
SteelPsychic
LevitateImmune to Ground attacks
Flash CannonExtrasensoryConfuse RayHypnosis
You Win
Steelix
Lv 36
SteelGround
Rock Head
Gyro BallIce FangDragon BreathSandstorm
Easy KO
Bastiodon
Lv 39
RockSteel
Sturdy
Flash CannonAncient PowerIron DefenseRest
Candice
Gym 7
Good

Steelix has the type edge here and should clean up Candice's team.

You Win
Snover
Lv 38
GrassIce
Snow Warning
AvalancheRazor LeafIngrainLeer
Easy KO
Sneasel
Lv 38
DarkIce
Inner Focus
AvalancheSlashFeint AttackTaunt
Even
Medicham
Lv 40
FightingPsychic
Pure Power
Ice PunchForce PalmDetectBulk Up
Even
Abomasnow
Lv 42
GrassIce
Snow Warning
AvalancheWood HammerGrass WhistleSwagger
Volkner
Gym 8
Even

Steelix trades roughly evenly with Volkner's team.

You Win
Raichu
Lv 46
Electric
Static
Charge BeamBrick BreakThunder WaveLight Screen
You Win
Ambipom
Lv 47
Normal
Technician
Shock WaveAgilityNasty PlotBaton Pass
Risky
Octillery
Lv 47
Water
Suction Cups
Charge BeamOctazookaAurora BeamBullet Seed
You Win
Luxray
Lv 49
Electric
Rivalry
Charge BeamThunder FangCrunchThunder Wave
Aaron
Elite Four
Good

Steelix has the type edge here and should clean up Aaron's team.

You Win
Dustox
Lv 53
BugPoison
Shield Dust
ToxicBug BuzzDouble TeamLight Screen
You Win
Beautifly
Lv 53
BugFlying
Swarm
Energy BallBug BuzzPsychicShadow Ball
You Win
Vespiquen
Lv 54
BugFlying
Pressure
Attack OrderDefend OrderHeal OrderPower Gem
Risky
Heracross
Lv 54
BugFighting
Swarm
MegahornClose CombatNight SlashStone Edge
You Win
Drapion
Lv 57
PoisonDark
Battle Armor
X ScissorCross PoisonIce FangAerial Ace
Bertha
Elite Four
Even

Steelix trades roughly evenly with Bertha's team.

Even
Quagsire
Lv 55
WaterGround
Damp
DigDouble TeamProtectSandstorm
You Win
Sudowoodo
Lv 56
Rock
Sturdy
EarthquakeSucker PunchHammer ArmSandstorm
You Win
Golem
Lv 56
RockGround
Rock Head
EarthquakeGyro BallBrick BreakSandstorm
Even
Whiscash
Lv 55
WaterGround
Oblivious
FissureAqua TailZen HeadbuttRock Slide
Even
Hippowdon
Lv 59
Ground
Sand Stream
EarthquakeStone EdgeCrunchCurse
Flint
Elite Four
Good

Steelix has the type edge here and should clean up Flint's team.

You Win
Rapidash
Lv 58
Fire
Run Away
Flare BlitzSolar BeamBounceSunny Day
You Win
Steelix
Lv 57
SteelGround
Rock Head
Fire FangRock TombScreechSunny Day
You Win
Drifblim
Lv 58
GhostFlying
Aftermath
Will O WispOminous WindDouble TeamBaton Pass
You Win
Lopunny
Lv 57
Normal
Cute Charm
Fire PunchCharmMirror CoatSunny Day
Even
Infernape
Lv 61
FireFighting
Blaze
Flare BlitzThunder PunchMach PunchEarthquake
Lucian
Elite Four
Even

Steelix trades roughly evenly with Lucian's team.

You Win
Mr Mime
Lv 59
Psychic
Soundproof
PsychicThunderboltReflectLight Screen
You Win
Girafarig
Lv 59
NormalPsychic
Inner Focus
PsychicShadow BallDouble HitCrunch
Even
Medicham
Lv 60
FightingPsychic
Pure Power
Drain PunchFire PunchThunder PunchIce Punch
Even
Alakazam
Lv 60
Psychic
Synchronize
PsychicEnergy BallFocus BlastRecover
Risky
Bronzong
Lv 63
SteelPsychic
LevitateImmune to Ground attacks
PsychicGyro BallEarthquakeCalm Mind
Mars
Commander
Good

Steelix has the type edge here and should clean up Mars's team.

You Win
Golbat
Lv 37
PoisonFlying
Inner Focus
Air CutterBiteToxicSupersonic
Even
Bronzor
Lv 37
SteelPsychic
LevitateImmune to Ground attacks
Gyro BallExtrasensoryIron DefenseConfuse Ray
You Win
Purugly
Lv 39
Normal
Thick Fat
SlashFeint AttackHypnosisFake Out
Jupiter
Commander
Strong

Steelix resists most of Jupiter's coverage and hits back hard.

Easy KO
Zubat
Lv 18
PoisonFlying
Inner Focus
Giga DrainWing AttackBite
Easy KO
Skuntank
Lv 20
PoisonDark
Stench
Night SlashPoison GasScreechSmokescreen
Saturn
Commander
Good

Steelix has the type edge here and should clean up Saturn's team.

You Win
Kadabra
Lv 38
Psychic
Synchronize
PsychicShock WaveRecoverEmbargo
Even
Bronzor
Lv 38
SteelPsychic
LevitateImmune to Ground attacks
Gyro BallExtrasensoryShadow BallConfuse Ray
Easy KO
Toxicroak
Lv 40
PoisonFighting
Anticipation
Poison JabBrick BreakX ScissorSwagger
Cynthia
Champion
Even

Steelix trades roughly evenly with Cynthia's team.

Even
Spiritomb
Lv 61
GhostDark
Pressure
Dark PulsePsychicSilver WindEmbargo
Even
Roserade
Lv 60
GrassPoison
Natural Cure
Energy BallSludge BombShadow BallExtrasensory
Even
Gastrodon
Lv 60
WaterGround
Sticky Hold
Muddy WaterEarthquakeStone EdgeSludge Bomb
Even
Lucario
Lv 63
FightingSteel
Steadfast
Aura SphereDragon PulsePsychicEarthquake
Risky
Milotic
Lv 63
Water
Marvel Scale
SurfIce BeamMirror CoatAqua Ring
Even
Garchomp
Lv 66
DragonGround
Sand Veil
Dragon RushEarthquakeBrick BreakGiga Impact

Catchable

Available before Badge 1
Type
RockGround
Tier
E

Catch Onix in Oreburgh Mine (walking, Lv 8, uncommon).

View Onix locations

How to Get Onix in Diamond & Pearl

Onix tunnels through five cave spots, common to rare, level 8 climbing all the way to 56. The level spread is enormous, so an early Onix and a late one are worlds apart in strength.

5 locations to catch Onix

Encountered via tall grass encounters

Badge 1
Badge 2
Badge 3
Badge 4
Badge 5
Badge 6
Badge 7
Badge 8
Post-Game

Where To Catch Onix in DP

Onix is the chain's first catch. You'll find walking encounters from Lv. 8-56 across 64 total spots in the chain.

Want the exact numbers? Work out your catch odds in Diamond & Pearl for Onix.

How to Get Shiny Onix in Diamond & Pearl

Onix winds through Iron Island and the Oreburgh Mine, where keeping a PokeRadar chain alive hands over its shiny. Compare Shiny Onix odds across every game

Normal vs Shiny
Normal Onix in Diamond & PearlNormal
Shiny Onix in Diamond & Pearl Shiny
Color ShiftGraytoGreen
Shiny TierB Tier Shiny

Shiny Onix Evolution

2 Forms
Showing shiny artworkView Full Evolution Chart

Diamond & Pearl Shiny Onix Calculator

2 Methods
Fastest Path

The best route is Masuda Method, about 1 in 1,639 on each try.

Step 1 · Encounter Method2 in Diamond & Pearl

Masuda Method: Breed with a parent from a different-language game. Works on any breedable line.

Full Odds: Walk through grass, surf, or fish. Every encounter is its own independent shiny roll.

How many you have done, or plan to do.

120,000
Shiny Odds Per Try1 / 1,639Masuda Method
Chance By Now50.0%at 1,136 eggs hatchedAbout 5 in 10 hunters have one by now
What To Expect
ChanceEncountersTime
10%lucky few173----
25%one in four472----
50%coin flip1,136----
90%very likely3,773----
How is this calculated?

Every encounter has the same shiny chance, the Shiny Odds Per Try shown above. Each one is a separate roll that does not care how many you have already done, so the more you hunt, the higher your overall chance of at least one shiny. The formula below turns your odds and your number of tries into that combined chance.

chance after N tries = 1 − (1 − p)^N,  where  p = 1 / odds per try

Example at 1 in 8,192 (classic full odds): about 864 encounters for a 10 percent chance, 5,678 for 50 percent, and 18,862 for 90 percent.

The table above flips that around: it shows how many encounters it takes to reach a 10, 25, 50, and 90 percent chance at your current odds. Turning on boosts like the Shiny Charm, sandwiches, or chains improves your odds, so the encounter numbers drop.

These are estimates, not promises. Most games have no pity counter, meaning no guaranteed shiny no matter how many you hunt, so even Very Likely is not guaranteed: some hunters find one early, others go well past that point.

Where these shiny odds come from: Read our full methodology

Curious how fast a hunt could go? Work out your Diamond & Pearl shiny odds for Onix.

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
DamageTypes
4x (Critical)Water, Grass
2x (Weak)Ice, Fighting, Ground, Steel
0.5x (Resist)Normal, Fire, Flying, Rock
0.25x (Resist)Poison
0x (Immune)Electric
Gen IV Type Chart
  • Fairy type does not exist — Dragon has fewer checks
  • Physical / Special split now per-move (introduced Gen IV)

What is Onix Weak Against

Fragile
6Weak
5Resist
1Immune
Score-7

What is Onix Strong Against

8Strong
0Resisted
0Immune
Score+8
½xResisted
None
0xImmune
None

Best Pokemon Against Onix

Torterra
Torterra
GrassGround
C
Exeggutor
Exeggutor
GrassPsychic
C
Roserade
Roserade
GrassPoison
B
Breloom
Breloom
GrassFighting
A
Shiftry
Shiftry
GrassDark
C

Onix Evolutions

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
Onix
#095Onix
Trade + Metal Coat
Trade + Metal Coat
Steelix
#208Steelix
Stat Comparison 2 Stages
Onix
RockGround
Steelix
SteelGround
HP
35
75+40
ATK
45
85+40
DEF
160
200+40
SP.ATK
30
55+25
SP.DEF
45
65+20
SPE
70
30-40
BST
385E-Tier
510A-Tier+125
ROLE
Balanced
Trick Room
TYPE
Utility
Physical

Breeding

Easy

Breed Onix easily with 29 breeding partners from the Mineral egg group. Pass egg moves like Block, Defense Curl, Explosion and 4 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
7moves
Breed With (best first)
glaliefroslasssnoruntporygon2claydolbronzongmagnezoneporygon-zprobopassgolemelectrodemagneton

DP Onix Best Moveset

160 Defense looks imposing, but 35 HP, 45 Attack, and 4x weaknesses to Water and Grass make any offensive moveset pointless. Trade-evolve into Steelix to get real bulk and actual attacking power.

Best Build

Experimental
Support
Ability
Rock Head
Item
Focus SashSURVIVAL
Best Nature for Onix
Jolly+SPE

Onix best EVs are Attack and Speed

EVs

Support Moveset

  • Stealth RockSTAB
  • EarthquakeSTAB
  • ExplosionCoverage
  • ToxicUtility

Moves List

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
—157520Normal
Lv 1
Harden
D——30Normal
Lv 1
Mud Sport
———15Ground
Lv 1
Tackle
D3510035Normal
Lv 6
Screech
——8540Normal
Lv 9
Rock Throw
—759015Rock
Lv 14
Rage
D2010020Normal
Lv 17
Rock Tomb
D909510Rock
Lv 22
Sandstorm
———10Rock
Lv 25
Slam
—807520Normal
Lv 30
Rock Polish
C——20Rock
Lv 33
Dragon Breath
—6010020Dragon
Lv 38
Iron Tail
D1007515Steel
Lv 41
Sand Tomb
—528515Ground
Lv 46
Double-Edge
D12010015Normal
Lv 49
Stone Edge
D150805Rock

TM Moves

37 of 38 TMs are obtainable before the Elite Four

TM
TM45
AttractAmity Squarebadge 2
——10015Normal
TM78
CaptivateRoute 204badge 2
——10020Normal
TM28
DigManiac Tunnelbadge 2
D12010010Ground
TM32
Double TeamWayward Cavebadge 2
———15Normal
TM59
Dragon PulseVictory Roadnot until badge 8
D9010010Dragon
TM26B15010010Ground
TM58
Endure+4Veilstone Game Cornerbadge 2
C——10Normal
TM64
ExplosionGiven by the coin clerk at the Veilstone Game Corner once you string together ten bonus rounds in a row on the slot machinesbadge 2
B2501005Normal
TM42
FacadeSurvival Area
D7010020Normal
TM91
Flash CannonPrize for defeating Byronbadge 6
D8010010Steel
TM21
FrustrationVeilstone Game Cornerbadge 2
D—10020Normal
TM74
Gyro BallVeilstone Game Cornerbadge 2
D—1005Steel
TM10
Hidden PowerVeilstone Game Corner
D6010015Normal
TM23
Iron TailIron Islandbadge 5
D1007515Steel
TM83
Natural GiftVeilstone Department Storebadge 2
D—10015Normal
TM66
PaybackRoute 215badge 2
D5010010Dark
TM17
Protect+4Veilstone Department Storebadge 2
C——10Normal
TM77
Psych UpRoute 211badge 4
———10Normal
TM44
RestVeilstone Game Cornerbadge 2
C——10Psychic
TM27
ReturnVeilstone Game Cornerbadge 2
D—10020Normal
TM05
Roar-6Route 213not until badge 7
C——20Normal
HM08
Rock ClimbRoute 217badge 6
—908520Normal
TM69
Rock PolishMt. Coronetbadge 6
C——20Rock
TM80
Rock SlideMt. Coronetnot until badge 7
D1129010Rock
HM06
Rock SmashOreburgh Gate
D4010015Fighting
TM39
Rock TombRavaged Pathbadge 1
D909510Rock
TM43
Secret PowerAmity Squarebadge 2
—7010020Normal
TM82
Sleep TalkEterna Forestbadge 2
C——10Normal
TM76
Stealth RockPrize for defeating Roarkbadge 1
B——20Rock
TM71
Stone EdgeVictory Roadnot until badge 8
D150805Rock
HM04
StrengthLost Towerbadge 2
D8010015Normal
TM90
SubstituteVeilstone Game Cornerbadge 2
C——10Normal
TM87
SwaggerTM in Mr Backlot office in the Pokémon Mansion on Route 212badge 2
——9015Normal
TM12
TauntRoute 211badge 1
C—10020Dark
TM41
TormentVictory Roadnot until badge 8
D—10015Dark
TM06
ToxicRoute 212badge 2
B—8510Poison

Egg Moves

Egg
Egg
Block
———5Normal
Egg
Defense Curl
D——40Normal
Egg
Explosion
B2501005Normal
Egg
Flail
D—10015Normal
Egg
Rock Blast
D379010Rock
Egg
Rock Slide
D1129010Rock
Egg
Rollout
—459020Rock

Tutor Moves

Onix can't learn any Tutor moves

Transfer Moves

Gen
Gen 3
Body Slam
D8510015Normal
Gen 3
Mimic
———10Normal

Base Stats

Base Stats
Avg
HP35
F
Attack45
D
Defense160
S
Sp. Atk30
F
Sp. Def45
D
Speed70
C
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.
Sturdy
Prevents being KOed from full HP, leaving 1 HP instead. Protects against the one-hit KO moves regardless of HP.
EV Yield
HPAtkDef+1SpASpDSpe
Defense training source
Pokedex Entry

When it travels underground, it causes rumbling and tremors. It can move at 50 mph.

It squirms through the ground using its long and rugged body. It always eats while burrowing.

Onix Diamond & Pearl Guide

  • No. Onix only evolves into Steelix through a real trade. There is no in-game alternative in Diamond & Pearl. The Metal Coat must be held during the trade. Bring one over from a sibling Gen 3 game if needed.

  • In Diamond & Pearl, 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.

  • In Diamond & Pearl, use Onix as a balanced. Physical side carries the damage. Speed is middling, Earthquake is the primary attack.

  • For Diamond & Pearl, run Jolly on Onix. +Speed is what matters, and the -Sp. Atk cut doesn't hurt this set. Fits the balanced role.

  • For Diamond & Pearl, build your team around Machoke, Electrode, and Venusaur. These have the highest co-usage rates with Onix in competitive formats. They cover each other's weaknesses.

Game Availability

Present since Red & Blue, Onix appears in 21 games spanning 9 generations. Gen 1 originals like Onix have the longest track record of availability in the series.

Explore

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