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.
This chain of immense stones resembles a giant serpent. Tremors shake the earth above as it burrows deep beneath the ground, feeding on boulders as it goes.
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 |
 Dondozo Water | A | |
Water deals 4x damage to OnixView Dondozo → | ||
 Annihilape FightingGhost | A | |
Fighting is super effective against OnixView Annihilape → | ||
 Krookodile GroundDark | A | |
Ground is super effective against OnixView Krookodile → | ||
In Legends: Z-A, Annihilape's Drain Punch hits Onix for 63-74%. Krookodile's Earthquake also KOs at 97-114%.
Dondozo Water | A | |
Recommended Build AbilityUnaware ItemLeftovers NatureImpish Moves View Dondozo builds →
| ||
Annihilape FightingGhost | A | |
Recommended Build AbilityDefiant ItemSitrus Berry NatureJolly Moves
Damage vs Onix View Annihilape builds →Drain Punch 2x63-74% | ||
Krookodile GroundDark | A | |
Recommended Build AbilityMoxie ItemChoice Scarf NatureJolly Moves
Damage vs Onix View Krookodile builds →Earthquake 2x97-114%KO Knock Off32-37% Close Combat 2x77-91% | ||
Legends: Z-A 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
Legends: Z-A Onix Best Moveset
Sturdy isn't flashy, but it matters. Combined with Weakness Policy for a massive attack boost after eating a super-effective hit and max Attack and Speed EVs, Onix fills the physical attacker slot reliably. Adamant nature finishes the spread.
Best Build
Onix best EVs are Attack and Speed
Physical Sweeper Moveset
- Earthquake
- Explosion
- Body Press
- Stone Edge
Physical Setup Sweeper Moveset
- Stealth Rock
- Earthquake
- Body Press
- Dragon Dance
Physical Tank Moveset
- Stealth Rock
- Toxic
- Rock Tomb
- Sunny Day
Recommended Teammates
Moves
The level-up pool tells the story here. Onix learns Iron Tail and Stone Edge naturally, plus enough variety that TMs feel like bonuses. Normal and Dragon coverage extends the reach beyond that.
Level-Up Moves
TM Moves
Egg Moves
Tutor Moves
How to Get Onix in Legends: Z-A
Onix Guide
At 385 BST, Onix is firmly in pre-evolution territory. Evolve it into Steelix before bringing it to any serious fight.
In Legends: Z-A, 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 Legends: Z-A, 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