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 stat exp per fight on a medium-fast 1M XP curve.
As it digs through the ground, it absorbs many hard objects. This is what makes its body so solid.
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 |
- Dark and Steel types added — Fairy does not exist yet
- Moves are Physical or Special based on type, not per move
- Special stat split into Sp.Atk and Sp.Def
 Chikorita Grass | D | |
Obtain MethodNew Bark Town Gift | ||
 Poliwag Water | D | |
 Bellsprout GrassPoison | D | |
 Totodile Water | D | |
Obtain MethodNew Bark Town Gift | ||
 Marill Water | D | |
 Celebi PsychicGrass | A | |
Obtain MethodIlex Forest Interact Encounter | ||
 Quagsire WaterGround | C | |
Obtain MethodRoute 32 Surfing Available Moves Moves
Damage vs Onix View Quagsire builds →Water Gun 4x121-143%KO Mud-Slap 2x17-21% | ||
 Lapras WaterIce | C | |
Obtain MethodUnion Cave Interact Encounter | ||
Chikorita Grass | D | |
Obtain MethodNew Bark Town Gift Available Moves Moves
Damage vs Onix View Chikorita builds →Razor Leaf 4x133-157%KO Mud-Slap 2x12-14% | ||
 Oddish GrassPoison | D | |
Celebi PsychicGrass | A | |
Obtain MethodIlex Forest Interact Encounter | ||
Lapras WaterIce | C | |
Obtain MethodUnion Cave Interact Encounter Available Moves Moves
Damage vs Onix View Lapras builds →Blizzard 2x182-216%KO Water Gun 4x142-168%KO Rock Smash 2x20-24% | ||
Quagsire WaterGround | C | |
Obtain MethodRoute 32 Surfing Available Moves Moves
Damage vs Onix View Quagsire builds →Ice Punch 2x70-84% Water Gun 4x122-144%KO Rock Smash 2x20-24% Mud-Slap 2x20-24% | ||
Chikorita Grass | D | |
Obtain MethodNew Bark Town Gift Available Moves Moves
Damage vs Onix View Chikorita builds →Razor Leaf 4x132-156%KO Mud-Slap 2x10-12% | ||
Oddish GrassPoison | D | |
Celebi PsychicGrass | A | |
Obtain MethodIlex Forest Interact Encounter | ||
Quagsire WaterGround | C | |
Obtain MethodRoute 32 Surfing Available Moves Moves
Damage vs Onix View Quagsire builds →Surf 4x245-290%KO Dig 2x55-65% Ice Punch 2x70-83% Water Gun 4x118-140%KO | ||
Lapras WaterIce | C | |
Obtain MethodUnion Cave Interact Encounter Available Moves Moves
Damage vs Onix View Lapras builds →Blizzard 2x182-215%KO Surf 4x297-350%KO Water Gun 4x143-170%KO Rock Smash 2x18-23% | ||
Chikorita Grass | D | |
Obtain MethodNew Bark Town Gift Available Moves Moves
Damage vs Onix View Chikorita builds →Razor Leaf 4x127-150%KO Mud-Slap 2x8-10% | ||
 Sunkern Grass | D | |
Available Moves Moves
Damage vs Onix View Sunkern builds →Mega Drain 4x75-90% Absorb 4x42-50% | ||
Celebi PsychicGrass | A | |
Obtain MethodIlex Forest Interact Encounter | ||
Lapras WaterIce | C | |
Obtain MethodUnion Cave Interact Encounter Available Moves Moves
Damage vs Onix View Lapras builds →Blizzard 2x181-213%KO Iron Tail 2x42-50% Surf 4x297-350%KO Icy Wind 2x92-108%KO | ||
 Hoppip Grass | D | |
 Wooper WaterGround | D | |
Available Moves Moves
Damage vs Onix View Wooper builds →Earthquake 2x42-50% Iron Tail 2x28-33% Dynamic Punch 2x28-33% Surf 4x142-167%KO | ||
Sunkern Grass | D | |
Available Moves Moves
Damage vs Onix View Sunkern builds →Mega Drain 4x71-83% Absorb 4x42-50% | ||
Celebi PsychicGrass | A | |
Obtain MethodIlex Forest Interact Encounter | ||
Lapras WaterIce | C | |
Obtain MethodUnion Cave Interact Encounter Available Moves Moves
Damage vs Onix View Lapras builds →Blizzard 2x176-207%KO Iron Tail 2x41-49% Surf 4x289-341%KO Icy Wind 2x89-105%KO | ||
Hoppip Grass | D | |
Wooper WaterGround | D | |
Available Moves Moves
Damage vs Onix View Wooper builds →Earthquake 2x41-49% Iron Tail 2x27-32% Dynamic Punch 2x27-32% Surf 4x130-154%KO | ||
Sunkern Grass | D | |
Available Moves Moves
Damage vs Onix View Sunkern builds →Mega Drain 4x69-81% Absorb 4x41-49% | ||
Celebi PsychicGrass | A | |
Obtain MethodIlex Forest Interact Encounter | ||
 Gyarados Water | C | |
Obtain MethodLake Of Rage Interact Encounter Available Moves Moves
Damage vs Onix View Gyarados builds →Blizzard 2x89-105%KO Surf 4x227-268%KO Icy Wind 2x46-54% Rock Smash 2x23-27% | ||
Hoppip Grass | D | |
Wooper WaterGround | D | |
Available Moves Moves
Damage vs Onix View Wooper builds →Earthquake 2x41-49% Iron Tail 2x27-32% Dynamic Punch 2x27-32% Surf 4x130-154%KO | ||
Sunkern Grass | D | |
Available Moves Moves
Damage vs Onix View Sunkern builds →Mega Drain 4x69-81% Absorb 4x41-49% | ||
Celebi PsychicGrass | A | |
Obtain MethodIlex Forest Interact Encounter | ||
 Tangela Grass | C | |
Available Moves Moves
Damage vs Onix View Tangela builds →Vine Whip 4x165-195%KO Mega Drain 4x151-178%KO Absorb 4x82-97% | ||
Hoppip Grass | D | |
Wooper WaterGround | D | |
Available Moves Moves
Damage vs Onix View Wooper builds →Earthquake 2x41-49% Iron Tail 2x27-32% Dynamic Punch 2x27-32% Surf 4x130-154%KO | ||
Sunkern Grass | D | |
Available Moves Moves
Damage vs Onix View Sunkern builds →Mega Drain 4x69-81% Absorb 4x41-49% | ||
In Crystal, Machamp's Earthquake hits Onix for 57-67%. Golem deals 81-95% with Earthquake.
 Machamp Fighting | A | |
Recommended Build ItemLeftovers Moves
Damage vs Onix View Machamp builds →Rock Slide10-13% Earthquake 2x57-67% | ||
 Skarmory Steel | A | |
Recommended Build ItemLeftovers Moves
Damage vs Onix View Skarmory builds →Drill Peck11-13% | ||
 Golem RockGround | A | |
Recommended Build ItemLeftovers Moves
Damage vs Onix View Golem builds →Earthquake 2x81-95% Explosion33-39% Rapid Spin7-8% | ||
 Vaporeon Water | B | |
Recommended Build ItemLeftovers Moves
Damage vs Onix View Vaporeon builds →Surf 4x374-441%KO | ||
 Jynx IcePsychic | B | |
Recommended Build ItemLeftovers Moves
Damage vs Onix View Jynx builds →Ice Beam 2x194-229%KO Psychic97-114%KO Thief43-51% | ||
Crystal 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 12 breeding partners from the Mineral egg group. Pass egg moves like Flail, Rock Slide to offspring.
Crystal Onix Best Moveset
Best Build
Gen 2 build content has limited support (no abilities).
Try selecting a different game/generation filter, or check back later.
Moves
The level-up pool is slim, so TMs matter here. Onix's Normal and Steel coverage all comes from technical machines, built on top of Earthquake and Dig for same-type damage. Earthquake and Iron Tail are the payoff moves.
Level-Up Moves
TM Moves
Egg Moves
Tutor Moves
Crystal Onix Locations
high spawn rates in early-game routes across 9 locations. Onix's one of the easier catches on the list. Knock it out fast and save your time for harder targets.
Best Locations to Catch Onix in Crystal
You can find Onix through 9 walking and trade encounters at Lv. 6-48. The list is sorted by game progression, so the earliest accessible spots show up first.
Onix Guide
At 385 BST, Onix is firmly in pre-evolution territory. Evolve it into Steelix before bringing it to any serious fight.
In Crystal, 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.
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 Crystal, 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 is immune to Electric moves. Free switch-in every time. Defense is the best stat at base 160. Dual typing means STAB coverage on both Rock and Ground moves.
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