The Pokémon Onix is one of the most iconic creatures from the series, thanks to its prevalence in the anime as Brock’s loyal sidekick. This massive stony serpent is a mainstay of the franchise, and thanks to this guide, you can get to know it a little better.
Onix is right at the beginning of the Pokédex, so get to know some more of its earthy companions with our rock Pokémon and ground Pokémon guides.
Here’s everything in our Onix guide:
Here’s the key information you need to know about Onix:
National Pokédex #
0,095
Type
Rock/Ground
Abilities
Rock Head or Sturdy
Hidden ability
Weak Armor
Gender ratio
Male – 50%
Female – 50%
Catch rate
11.9%
Egg group
Mineral
EV yield
One defense
Onix’s evolution
Onix can evolve at any level, but you have to trade it to another player while it’s holding a Steel Coat. This evolves it into Steelix.
Onix’s locations
Here are all the locations you can find Onix in each Pokémon game:
Gen 1 locations
Red / Blue
Rock Tunnel and Victory Road
Yellow
Rock Tunnel and Victory Road
Gen 2 locations
Gold / Silver
Rock Tunnel, Mt. Silver Cave, Victory Road, Union Cave, or trade Bellsprout in Violet City
Crystal
Rock Tunnel, Mt. Silver Cave, Victory Road, Union Cave, or trade Bellsprout in Violet City
Gen 3 locations
Ruby / Sapphire
Trade
Emerald
Trade
FireRed / LeafGreen
Rock Tunnel, Victory Road, and Sevault Canyon
Colosseum
Trade
XD
Trade
Gen 4 locations
Diamond / Pearl
Iron Island, Snowpoint Temple, Oreburgh Mine, Victory Road, and Stark Mountain
Platinum
Iron Island, Oreburgh Mine, Victory Road, and Wayward Cave
HeartGold / SoulSilver
Union Cave, Mt. Silver Cave, Cliff Cave, Victory Road, Rock Tunnel, Safari Zone (Wasteland, default), or trade Bellsprout in Violet City
Gen 5 locations
Black / White
Relic Castle
Black 2 / White 2
Relic Passage, Twist Mountain, Clay Tunnel, Underground Ruins, and Victory Road
Gen 6 locations
X
Cyllage City (Rock Smash), Glittering Cave, and Friend Safari (Rock)
Y
Glittering Cave and Friend Safari (Rock)
Omega Ruby / Alpha Sapphire
Granite Cave and Mirage Caves
Gen 7 locations
Sun / Moon
Trade
Ultra Sun / Ultra Moon
Ten Carat Hill (Island Scan)
Let’s Go Pikachu / Let’s Go Eevee
Mt. Moon, Rock Tunnel, and Victory Road
Gen 8 locations
Sword / Shield
East Lake Axewell, Giant’s Seat, Motostoke Riverbank, Rolling Fields (Wanderer), Bridge Field, Dusty Bowl, Giant’s Seat, Hammerlocke Hills, Rolling Fields, and Stony Wilderness (Max Raid Battle)
Brilliant Diamond / Shining Pearl
Iron Island, Snowpoint Temple, Oreburgh Mine, Victory Road, Stark Mountain, Grand Underground – Rocky Cave, Volcanic Cave, Sandsear Cave, Big Bluff Cavern, and Typhlo Cavern
Legends: Arceus
Obsidian Fieldlands: Space-time distortions; Crimson Mirelands: near Scarlet Bog, near Diamond Settlement, near Lake Valor, massive mass outbreaks; Cobalt Coastlands: massive mass outbreaks, and Coronet Highlands: Celestica Trail
Gen 9 locations
Scarlet / Violet
Unobtainable
Legends: Z-A
Magenta District: Wild Zone 14
How do I get Onix in Pokémon Pokopia?
Luckily for you, we have an entire dedicated Pokémon Pokopia Onix guide to help you free the rock snake from its prison and build it the perfect home.
Onix’s base stats
Onix’s base stats are as follows. As you level it up, these stats grow.
- HP – 35
- Attack – 45
- Defense – 160
- Sp. Atk – 30
- Sp. Def – 45
- Speed – 70
Onix’s type strengths and weaknesses
Onix’s dual Rock/Ground typing gives it a pretty advantageous matchup spread. It’s completely immune to electric attacks and resists five other types. No wonder Brock’s Onix causes so many problems in gen one Nuzlockes!
Normal damage
Bug, Dark, Dragon, Fairy, Ghost, Psychic
Weak
Fighting, Grass, Ground, Ice, Steel, Water
Resistant
Fire, Flying, Normal, Poison, Rock
Immune
Electric
Onix’s moveset
In the latest generation of Pokémon games, Onix can learn the following moves:
Level up moves
Level
Move
Type
Move reminder
Rock Blast
Rock
One
Tackle
Normal
One
Rock Throw
Rock
One
Harden
Normal
12
Dragon Breath
Dragon
16
Curse
Ghost
20
Rock Slide
Rock
22
Breaking Swipe
Dragon
24
Screech
Normal
28
Sand Tomb
Ground
32
Stealth Rock
Rock
44
Dig
Ground
48
Iron Tail
Steel
52
Stone Edge
Rock
56
Double-Edge
Normal
62
Head Smash
Rock
Learnable TMs
Move
Type
Curse
Ghost
Dig
Ground
Double-Edge
Normal
Dragon Pulse
Dragon
Earthquake
Ground
Endure
Normal
Facade
Normal
Iron Head
Steel
Iron Tail
Steel
Meteor Beam
Rock
Protect
Normal
Rock Slide
Rock
Rock Tomb
Rock
Scorching Sands
Ground
Self-Destruct
Normal
Stealth Rock
Rock
Stone Edge
Rock
Substitute
Normal
Taunt
Dark
That’s it for our Onix guide, so now you know more about this iconic snake.
