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.
It twists and squirms through the ground. The thunderous roar of its tunneling echoes a long way.
It rapidly bores through the ground at 50 mph by squirming and twisting its massive, rugged body.
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.
| 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 |
- Fairy type does not exist — Dragon has fewer checks
- Physical / Special split now per-move (introduced Gen IV)
 Whiscash WaterGround | C | |
 Buizel Water | C | |
 Chikorita Grass | D | |
Obtain MethodNew Bark Town Gift | ||
 Totodile Water | D | |
Obtain MethodNew Bark Town Gift | ||
 Bellsprout GrassPoison | D | |
Whiscash WaterGround | C | |
Available Moves Moves
Damage vs Onix View Whiscash builds →Mud Bomb 2x95-114%KO Water Gun 4x133-157%KO Mud-Slap 2x36-43% | ||
 Carnivine Grass | C | |
Available Moves Moves
Damage vs Onix View Carnivine builds →Vine Whip 4x71-86% Bullet Seed 4x48-57% | ||
Chikorita Grass | D | |
Obtain MethodNew Bark Town Gift Available Moves Moves
Damage vs Onix View Chikorita builds →Razor Leaf 4x60-71% Bullet Seed 4x36-43% | ||
 Paras BugGrass | D | |
 Hoppip Grass | D | |
Carnivine Grass | C | |
Available Moves Moves
Damage vs Onix View Carnivine builds →Solar Beam 4x408-480%KO Energy Ball 4x316-372%KO Vine Whip 4x80-96% Bullet Seed 4x50-60% | ||
 Lapras WaterIce | C | |
Obtain MethodUnion Cave Interact Encounter Available Moves Moves
Damage vs Onix View Lapras builds →Blizzard 2x182-216%KO Ice Beam 2x146-174%KO Water Pulse 4x204-240%KO Water Gun 4x142-168%KO | ||
Chikorita Grass | D | |
Obtain MethodNew Bark Town Gift Available Moves Moves
Damage vs Onix View Chikorita builds →Solar Beam 4x264-312%KO Energy Ball 4x204-240%KO Magical Leaf 4x142-168%KO Razor Leaf 4x60-72% | ||
Paras BugGrass | D | |
Available Moves Moves
Damage vs Onix View Paras builds →Solar Beam 4x264-312%KO Energy Ball 4x204-240%KO Brick Break 2x30-36% Bullet Seed 4x40-48% | ||
Hoppip Grass | D | |
Available Moves Moves
Damage vs Onix View Hoppip builds →Solar Beam 4x224-264%KO Energy Ball 4x172-204%KO Bullet Seed 4x30-36% | ||
Carnivine Grass | C | |
Available Moves Moves
Damage vs Onix View Carnivine builds →Solar Beam 4x407-480%KO Energy Ball 4x313-370%KO Vine Whip 4x75-90% Bullet Seed 4x50-60% | ||
Chikorita Grass | D | |
Obtain MethodNew Bark Town Gift Available Moves Moves
Damage vs Onix View Chikorita builds →Solar Beam 4x272-320%KO Energy Ball 4x203-240%KO Magical Leaf 4x143-170%KO Razor Leaf 4x58-70% | ||
Paras BugGrass | D | |
Available Moves Moves
Damage vs Onix View Paras builds →Solar Beam 4x255-300%KO Energy Ball 4x195-230%KO Dig 2x30-37% Brick Break 2x30-37% | ||
Hoppip Grass | D | |
Available Moves Moves
Damage vs Onix View Hoppip builds →Solar Beam 4x220-260%KO Energy Ball 4x170-200%KO Mega Drain 4x85-100%KO Bullet Seed 4x25-30% | ||
 Sunkern Grass | D | |
Available Moves Moves
Damage vs Onix View Sunkern builds →Solar Beam 4x203-240%KO Energy Ball 4x152-180%KO Mega Drain 4x75-90% Bullet Seed 4x25-30% | ||
Carnivine Grass | C | |
Available Moves Moves
Damage vs Onix View Carnivine builds →Solar Beam 4x410-483%KO Energy Ball 4x311-367%KO Vine Whip 4x71-83% Bullet Seed 4x42-50% | ||
Chikorita Grass | D | |
Obtain MethodNew Bark Town Gift Available Moves Moves
Damage vs Onix View Chikorita builds →Solar Beam 4x261-308%KO Iron Tail 2x28-33% Energy Ball 4x197-233%KO Magical Leaf 4x133-158%KO | ||
Paras BugGrass | D | |
Available Moves Moves
Damage vs Onix View Paras builds →Solar Beam 4x247-292%KO Energy Ball 4x190-225%KO Dig 2x31-36% Brick Break 2x28-33% | ||
Hoppip Grass | D | |
Available Moves Moves
Damage vs Onix View Hoppip builds →Solar Beam 4x213-250%KO Energy Ball 4x163-192%KO Mega Drain 4x78-92% Bullet Seed 4x28-33% | ||
Sunkern Grass | D | |
Available Moves Moves
Damage vs Onix View Sunkern builds →Solar Beam 4x197-233%KO Energy Ball 4x149-175%KO Razor Leaf 4x42-50% Mega Drain 4x71-83% | ||
Carnivine Grass | C | |
Available Moves Moves
Damage vs Onix View Carnivine builds →Solar Beam 4x414-488%KO Energy Ball 4x311-368%KO Vine Whip 4x70-83% Bullet Seed 4x44-53% | ||
Chikorita Grass | D | |
Obtain MethodNew Bark Town Gift Available Moves Moves
Damage vs Onix View Chikorita builds →Solar Beam 4x268-315%KO Iron Tail 2x29-35% Energy Ball 4x204-240%KO Magical Leaf 4x140-165%KO | ||
Paras BugGrass | D | |
Available Moves Moves
Damage vs Onix View Paras builds →Solar Beam 4x255-300%KO Energy Ball 4x191-225%KO Dig 2x29-35% Giga Drain 4x165-195%KO | ||
Hoppip Grass | D | |
Available Moves Moves
Damage vs Onix View Hoppip builds →Solar Beam 4x216-255%KO Energy Ball 4x165-195%KO Mega Drain 4x76-90% Bullet Seed 4x25-30% | ||
Sunkern Grass | D | |
Available Moves Moves
Damage vs Onix View Sunkern builds →Solar Beam 4x198-233%KO Energy Ball 4x153-180%KO Razor Leaf 4x38-45% Mega Drain 4x70-83% | ||
Carnivine Grass | C | |
Available Moves Moves
Damage vs Onix View Carnivine builds →Solar Beam 4x399-469%KO Energy Ball 4x300-354%KO Vine Whip 4x72-85% Bullet Seed 4x45-54% | ||
Chikorita Grass | D | |
Obtain MethodNew Bark Town Gift Available Moves Moves
Damage vs Onix View Chikorita builds →Solar Beam 4x254-300%KO Iron Tail 2x28-33% Energy Ball 4x196-231%KO Magical Leaf 4x131-154%KO | ||
Paras BugGrass | D | |
Available Moves Moves
Damage vs Onix View Paras builds →Solar Beam 4x247-292%KO Energy Ball 4x188-223%KO Dig 2x29-36% Giga Drain 4x156-185%KO | ||
Hoppip Grass | D | |
Available Moves Moves
Damage vs Onix View Hoppip builds →Solar Beam 4x209-246%KO Energy Ball 4x156-185%KO Mega Drain 4x78-92% Bullet Seed 4x26-31% | ||
Sunkern Grass | D | |
Available Moves Moves
Damage vs Onix View Sunkern builds →Solar Beam 4x188-223%KO Energy Ball 4x144-169%KO Razor Leaf 4x38-46% Mega Drain 4x72-85% | ||
Carnivine Grass | C | |
Available Moves Moves
Damage vs Onix View Carnivine builds →Solar Beam 4x419-493%KO Energy Ball 4x317-373%KO Vine Whip 4x68-80% Bullet Seed 4x44-53% | ||
 Tangela Grass | C | |
Available Moves Moves
Damage vs Onix View Tangela builds →Solar Beam 4x459-540%KO Energy Ball 4x346-407%KO Vine Whip 4x44-53% Mega Drain 4x158-187%KO | ||
Chikorita Grass | D | |
Obtain MethodNew Bark Town Gift Available Moves Moves
Damage vs Onix View Chikorita builds →Solar Beam 4x266-313%KO Iron Tail 2x28-33% Energy Ball 4x203-240%KO Magical Leaf 4x136-160%KO | ||
Paras BugGrass | D | |
Available Moves Moves
Damage vs Onix View Paras builds →Solar Beam 4x254-300%KO Energy Ball 4x192-227%KO Dig 2x30-36% Giga Drain 4x163-193%KO | ||
Hoppip Grass | D | |
Available Moves Moves
Damage vs Onix View Hoppip builds →Solar Beam 4x214-253%KO Energy Ball 4x163-193%KO Giga Drain 4x136-160%KO Mega Drain 4x79-93% | ||
In HeartGold & SoulSilver, Infernape can KO Onix with Close Combat (106-125%). Flygon threatens a KO with Earthquake (87-102%). Bronzong deals 59-69% with Earthquake.
 Infernape FireFighting | A | |
Recommended Build AbilityBlaze ItemExpert Belt NatureJolly Moves
Damage vs Onix View Infernape builds →Close Combat 2x106-125%KO U Turn21-25% Fire Blast49-57% | ||
 Flygon GroundDragon | A | |
Recommended Build AbilityLevitate ItemChoice Scarf NatureJolly Moves
Damage vs Onix View Flygon builds →Earthquake 2x87-102%KO Outrage52-61% U Turn20-24% | ||
 Bronzong SteelPsychic | A | |
Recommended Build AbilityLevitate ItemLeftovers NatureBrave Moves
Damage vs Onix View Bronzong builds →Explosion36-43% Earthquake 2x59-69% | ||
 Swampert WaterGround | B | |
Recommended Build AbilityTorrent ItemLeftovers NatureRelaxed Moves
Damage vs Onix View Swampert builds →Earthquake 2x75-88% Ice Beam 2x100-118%KO Waterfall 4x121-142%KO | ||
 Roserade GrassPoison | B | |
Recommended Build AbilityNatural Cure ItemBlack Sludge NatureTimid Moves View Roserade builds →
| ||
HeartGold & SoulSilver 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
Breeding
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.
HeartGold & SoulSilver Onix Best Moveset
One guaranteed turn is all Onix needs. Focus Sash buys it, max Attack and Speed EVs make it count, and Rockhead adds something extra. The goal: get Stealth Rock up and deal damage with Earthquake. Normal coverage gives it play beyond just the lead turn.
Best Build
Onix best EVs are Attack and Speed
Support Moveset
- Stealth Rock
- Earthquake
- Explosion
- Toxic
Recommended Teammates
Moves
The natural movepool does the job, but Block and Defense Curl from the egg pool give Onix something extra.
Level-Up Moves
TM Moves
Egg Moves
Tutor Moves
Transfer Moves
HeartGold & SoulSilver Onix Locations
Onix's scattered across 22 spots in early-game routes with high spawn rates. Check the list below for the closest location to wherever you are in the game. This one's quick.
Best Locations to Catch Onix in HeartGold & SoulSilver
walking and trade encounters for Onix across 22 spots at Lv. 6-48. The catch is that SoulSilver and HeartGold don't share every location, so compare what's available in your version.
Onix Guide
At 385 BST, Onix is firmly in pre-evolution territory. Evolve it into Steelix before bringing it to any serious fight.
In HeartGold & SoulSilver, 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 HeartGold & SoulSilver, 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
- Gen 1Y
Yellow - Gen 1RBDebut
Red & Blue - Gen 2GS
Gold & Silver - Gen 2C
Crystal - Gen 3RS
Ruby & Sapphire - Gen 3FRLG
FireRed & LeafGreen - Gen 3E
Emerald - Gen 4Pt
Platinum - Gen 4HGSS
HeartGold & SoulSilver - Gen 4DP
Diamond & Pearl - Gen 5BW
Black & White - Gen 5B2W2
Black 2 & White 2 - Gen 6XY
X & Y - Gen 6ORAS
Omega Ruby & Alpha Sapphire - Gen 7USUM
Ultra Sun & Ultra Moon - Gen 7SM
Sun & Moon - Gen 7LGPE
Let's Go Pikachu & Eevee - Gen 8SwSh
Sword & Shield - Gen 8PLA
Legends: Arceus - Gen 8BDSP
Brilliant Diamond & Shining Pearl - Gen 9SV
Scarlet & Violet - Gen 9LZA
Legends: Z-A - Gen 10WW
Winds & Waves