Onix locations — where to catch
- Celestica Trail — Walk
- Diamond Settlement — Walk
- Lake Valor — Walk
- Scarlet Bog — Walk
- Space-time distortions — Walk
- Iron Island — Walk
- Oreburgh Mine — Walk
- Snowpoint Temple — Walk
- Stark Mountain — Walk
- Victory Road — Walk
- Wayward Cave — Walk
- Cliff Cave — Walk
- Johto Safari Zone — Walk
- Mt. Silver — Walk
- Mt. Silver Cave — Walk
- Rock Tunnel — Walk
- Route 47 — Walk
- Union Cave — Walk
- Victory Road — Walk
- Violet City — Trade
- Mt. Silver — Walk
- Mt. Silver Cave — Walk
- Rock Tunnel — Walk
- Union Cave — Walk
- Rock Tunnel — Walk
- Victory Road — Walk
Other games (8)
- Brilliant Diamond / Shining Pearl (Gen 8): Iron Island, Oreburgh Mine, Victory Road, Snowpoint Temple, Stark Mountain
- Sword / Shield (Gen 8): Bridge Field, Dusty Bowl, East Lake Axewell, Giant's Seat, Hammerlocke Hills, Motostoke Riverbank, Rolling Fields, Stony Wilderness
- Let's Go, Pikachu! / Let's Go, Eevee! (Gen 7): Kanto Victory Road 1, Mt Moon, Rock Tunnel
- Ultra Sun / Ultra Moon (Gen 7): Ten Carat Hill
- Omega Ruby / Alpha Sapphire (Gen 6): Fortree City, Granite Cave, Route 129, Mirage Spot Cave
- X / Y (Gen 6): Cyllage City, Friend Safari, Glittering Cave
- Black 2 / White 2 (Gen 5): Clay Tunnel, Glacier Room, Iron Room, Relic Passage, Rocky Mountain Room, Twist Mountain, Underground Ruins, Unova Victory Road 2
- Black / White (Gen 5): Relic Castle
Onix — full Pokédex entry