Is Onix Good in Ultra Sun & Ultra Moon Playthrough?
Breed-only Rock/Ground with terrible offensive stats. Even Steelix via Metal Coat trade doesn't save it from being outclassed by Alola's native Ground and Rock options like Mudsdale and Lycanroc.
Onix has the type edge here and should clean up Ilima's team.
Hala's team hits Onix's weaknesses hard.
Onix trades roughly evenly with Lana's team.
ElectricSteelReceived as a Totem-sized gift Pokemon by collecting enou... (Ultra Moon only)
BugElectricReceived as a Totem-sized gift Pokemon by collecting enou... (Ultra Sun only)
GrassReceived as a Totem-sized gift Pokemon by collecting enou... (Ultra Sun only)
GhostFairyReceived as a Totem-sized gift Pokemon by collecting enou...
Steelix trades roughly evenly with Kiawe's team.
Steelix trades roughly evenly with Mallow's team.
Onix trades roughly evenly with Olivia's team.
Steelix trades roughly evenly with Sophocles's team.
Acerola's typing presses Steelix's defenses.
Steelix trades roughly evenly with Nanu's team.
Steelix trades roughly evenly with Mina's team.
Steelix trades roughly evenly with Hapu's team.
Steelix trades roughly evenly with Molayne's team.
Steelix has the type edge here and should clean up Olivia's team.
Steelix trades roughly evenly with Acerola's team.
Steelix trades roughly evenly with Kahili's team.
Steelix trades roughly evenly with Kukui's team.
Catch Onix on Ten Carat Hill (walking, Lv 14). Island Scan; LIMITED; Tuesday.
Most players are ready to trade before reaching Kiawe.
How to Get Onix in Ultra Sun & Ultra Moon
Onix's 2-stage line starts with Onix, which appears in the wild in the locations below. Level through 2 stages while you find a trade partner. Everything except the trade step is solo.
Where To Catch Onix in USUM
- Step 1Onix ✓Ten Carat Hill - InsideLv.14GrassIsland Scan (Tuesday)
Step 2Evolve into Steelix
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 |
What is Onix Weak Against
FragileBest Pokemon Against Onix
 Slowbro WaterPsychic | B | |
Available Moves Moves
Damage vs Onix View Slowbro builds →Water Gun 4x145-171%KO Brick Break 2x31-38% | ||
 Hawlucha Fighting | A | |
 Petilil Grass | C | |
 Ivysaur GrassPoison | C | |
 Crabrawler Fighting | C | |
Available Moves Moves
Damage vs Onix View Crabrawler builds →Brick Break 2x52-64% Bubble 4x64-76% Frost Breath 2x43-52% | ||
 Vaporeon Water | C | |
Obtain MethodEvolve Eevee (Paniola Ranch Gift) Available Moves Moves
Damage vs Onix View Vaporeon builds →Water Pulse 4x235-278%KO Aurora Beam 2x83-100%KO | ||
 Grovyle Grass | C | |
Available Moves Moves
Damage vs Onix View Grovyle builds →Mega Drain 4x235-278%KO Brick Break 2x28-33% | ||
Slowbro WaterPsychic | B | |
Available Moves Moves
Damage vs Onix View Slowbro builds →Water Gun 4x150-178%KO Brick Break 2x31-37% | ||
Hawlucha Fighting | A | |
 Popplio Water | D | |
Obtain MethodRoute 1 Gift Available Moves Moves
Damage vs Onix View Popplio builds →Bubble Beam 4x169-200%KO Icy Wind 2x50-59% | ||
Vaporeon Water | C | |
Obtain MethodEvolve Eevee (Paniola Ranch Gift) Available Moves Moves
Damage vs Onix View Vaporeon builds →Water Pulse 4x244-288%KO Aurora Beam 2x88-104%KO | ||
Grovyle Grass | C | |
Available Moves Moves
Damage vs Onix View Grovyle builds →Mega Drain 4x254-300%KO Brick Break 2x30-36% | ||
Slowbro WaterPsychic | B | |
Available Moves Moves
Damage vs Onix View Slowbro builds →Water Gun 4x162-192%KO Brick Break 2x34-40% | ||
Hawlucha Fighting | A | |
 Brionne Water | C | |
Obtain MethodEvolve Popplio (Route 1 Gift) Available Moves Moves
Damage vs Onix View Brionne builds →Water Gun 4x142-168%KO Icy Wind 2x64-76% | ||
 Gallade PsychicFighting | C | |
Available Moves Moves
Damage vs Onix View Gallade builds →Leaf Blade 4x105-124%KO Brick Break 2x66-78% | ||
Vaporeon Water | C | |
Obtain MethodEvolve Eevee (Paniola Ranch Gift) Available Moves Moves
Damage vs Onix View Vaporeon builds →Water Pulse 4x236-279%KO Aurora Beam 2x84-100%KO | ||
Ivysaur GrassPoison | C | |
Grovyle Grass | C | |
Available Moves Moves
Damage vs Onix View Grovyle builds →Energy Ball 4x281-331%KO Brick Break 2x26-31% | ||
 Passimian Fighting | C | |
Available Moves Moves
Damage vs Onix View Passimian builds →Brick Break 2x60-72% Energy Ball 4x117-138%KO | ||
Gallade PsychicFighting | C | |
Available Moves Moves
Damage vs Onix View Gallade builds →Leaf Blade 4x103-121%KO Brick Break 2x65-77% Bulldoze 2x35-42% | ||
Vaporeon Water | C | |
Obtain MethodEvolve Eevee (Paniola Ranch Gift) Available Moves Moves
Damage vs Onix View Vaporeon builds →Water Pulse 4x247-291%KO Aurora Beam 2x89-106%KO | ||
Ivysaur GrassPoison | C | |
Grovyle Grass | C | |
Available Moves Moves
Damage vs Onix View Grovyle builds →Energy Ball 4x300-355%KO Brick Break 2x27-33% | ||
 Starmie WaterPsychic | B | |
 Venusaur GrassPoison | C | |
Available Moves Moves
Damage vs Onix View Venusaur builds →Petal Dance 4x453-533%KO Bulldoze 2x28-33% | ||
 Primarina WaterFairy | B | |
Obtain MethodEvolve Popplio (Route 1 Gift) Available Moves Moves
Damage vs Onix View Primarina builds →Sparkling Aria 4x414-488%KO Energy Ball 4x276-325%KO Ice Beam 2x138-163%KO | ||
 Decidueye GrassGhost | C | |
Obtain MethodEvolve Rowlet (Route 1 Gift) Available Moves Moves
Damage vs Onix View Decidueye builds →Leaf Storm 4x490-578%KO Low Sweep 2x34-40% Steel Wing 2x35-43% | ||
 Lilligant Grass | C | |
 Golisopod BugWater | B | |
Obtain MethodEvolve Wimpod (Dividing Peak Tunnel Interact Encounter) Available Moves Moves
Damage vs Onix View Golisopod builds →Razor Shell 4x134-158%KO Brick Break 2x44-53% Ice Beam 2x76-90% | ||
 Torterra GrassGround | C | |
Available Moves Moves
Damage vs Onix View Torterra builds →Wood Hammer 4x177-208%KO Earthquake 2x74-89% | ||
Ivysaur GrassPoison | C | |
Primarina WaterFairy | B | |
Obtain MethodEvolve Popplio (Route 1 Gift) Available Moves Moves
Damage vs Onix View Primarina builds →Sparkling Aria 4x405-478%KO Energy Ball 4x270-318%KO Ice Beam 2x135-159%KO | ||
Decidueye GrassGhost | C | |
Obtain MethodEvolve Rowlet (Route 1 Gift) Available Moves Moves
Damage vs Onix View Decidueye builds →Leaf Storm 4x479-563%KO Low Sweep 2x33-39% Steel Wing 2x35-41% | ||
 Jellicent WaterGhost | C | |
Obtain MethodEvolve Frillish (Route 14 Interact Encounter) Available Moves Moves
Damage vs Onix View Jellicent builds →Water Spout 4x484-569%KO Energy Ball 4x194-229%KO Ice Beam 2x97-114%KO | ||
 Chesnaught GrassFighting | C | |
Available Moves Moves
Damage vs Onix View Chesnaught builds →Solar Beam 4x579-681%KO Hammer Arm 2x73-86% Bulldoze 2x30-36% | ||
Lilligant Grass | C | |
Torterra GrassGround | C | |
Available Moves Moves
Damage vs Onix View Torterra builds →Solar Beam 4x587-692%KO Earthquake 2x73-86% | ||
 Sceptile Grass | B | |
Available Moves Moves
Damage vs Onix View Sceptile builds →Solar Beam 4x773-910%KO Focus Blast 2x155-183%KO Bulldoze 2x25-31% | ||
Venusaur GrassPoison | C | |
Available Moves Moves
Damage vs Onix View Venusaur builds →Solar Beam 4x739-869%KO Bulldoze 2x24-29% | ||
 Exeggutor GrassPsychic | C | |
Chesnaught GrassFighting | C | |
Available Moves Moves
Damage vs Onix View Chesnaught builds →Solar Beam 4x601-707%KO Hammer Arm 2x74-88% Earthquake 2x49-59% | ||
 Virizion GrassFighting | B | |
Obtain MethodUltra Space Wilds Interact Encounter Available Moves Moves
Damage vs Onix View Virizion builds →Solar Beam 4x703-827%KO Close Combat 2x76-90% | ||
Torterra GrassGround | C | |
Available Moves Moves
Damage vs Onix View Torterra builds →Solar Beam 4x604-711%KO Earthquake 2x74-88% | ||
Lilligant Grass | C | |
C | ||
Recommended Build AbilityIntimidate ItemEviolite NatureJolly Moves
Damage vs Onix View Litten builds →Flare Blitz12-14% | ||
D | ||
Recommended Build AbilityFlame Body ItemEviolite NatureCareful Moves
Damage vs Onix View Larvesta builds →Flare Blitz12-14% U Turn14-17% | ||
D | ||
Recommended Build AbilityStatic ItemFocus Sash NatureHardy Moves View Pichu builds →
| ||
D | ||
Recommended Build AbilityBlaze ItemEviolite NatureAdamant Moves
Damage vs Onix View Charmander builds →Flare Blitz12-14% | ||
D | ||
Recommended Build AbilityIronfist ItemFocus Sash NatureJolly Moves View Chimchar builds →
| ||
Onix Evolutions
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
USUM Onix Best Moveset
160 Defense looks massive but 35 HP turns it into barely average effective bulk. Rock/Ground TermStab from 45 Attack threatens nothing. AbilityWeak Armor raises Speed when hit physically at Defense cost. The moveset has no offensive role. Steelix one evolution away trades Speed for Steel typing and 200 Defense.
Best Build
Onix best EVs are Speed
Support Moveset
- Toxic
- Stealth Rock
- Roar
- Protect
Recommended Teammates
Moves List
The natural movepool does the job, but Block and Defense Curl from the egg pool give Onix something extra.
How to Read the Moves Table
Tabs
- Level-Up
- Learned by leveling up.
- TM
- Taught by a Technical Machine.
- Egg
- Inherited via breeding.
- Tutor
- NPC tutor (cost: items, BP, money).
- Reminder
- An NPC reteaches any move this Pokemon could have learned by leveling up.
- Transfer
- Carried over from an older game using Pokemon HOME.
- Event
- Given out through Mystery Gift events.
Visual Signals
CAT (Category)
How the move deals damage and which stats it uses.
A small dot on the icon's corner marks the move as contact. That triggers abilities like Static, Flame Body, Rough Skin, or Iron Barbs, plus items like Rocky Helmet and Sticky Barb.
Tier (S to D)
Each move's competitive rank in RankedBoost's system. TM, Egg, and Tutor sort by tier by default (best first). On Level-Up, click the Tier header to do the same.
PWR (Power)
Base damage. Numbers shown in a type color include STAB (base × 1.5). Hover any colored number to see the math.
— means no power (status moves) or variable power.
Sorting & Filter
Click any column header to sort. Level-Up opens with Lv 1 at the top. TM, Egg, and Tutor open with the highest-tier moves at the top.
Search filters by move name or type. The Filter button limits the list to STAB, Physical, Special, or Status moves.
Level-Up Moves
TM Moves
Egg Moves
Tutor Moves
Base Stats
Onix Ultra Sun & Ultra Moon Guide
At 385 BST, Onix is firmly in pre-evolution territory. Evolve it into Steelix before bringing it to any serious fight.
In Ultra Sun & Ultra Moon, 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.
No. Onix only evolves into Steelix through a real trade. There is no in-game alternative in Ultra Sun & Ultra Moon. Trade needs a Game Boy Advance link cable and a second GBA running another Gen 3 game (FireRed, LeafGreen, Ruby, Sapphire, or Emerald). Trade Onix to a friend, then have them trade it back. The 2026 Switch re-release supports the same trade through local wireless on the Pokemon Center 2F Wireless Club, with no cables required. The Metal Coat must be held during the trade. Bring one over from a sibling Gen 3 game if needed.
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 mixed attacker with base 45 Attack and 30 Sp. Atk. 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.
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 1RBDebut
Red & Blue - Gen 1Y
Yellow - Gen 2GS
Gold & Silver - Gen 2C
Crystal - Gen 3RS
Ruby & Sapphire - Gen 3E
Emerald - Gen 3FRLG
FireRed & LeafGreen - Gen 4DP
Diamond & Pearl - Gen 4Pt
Platinum - Gen 4HGSS
HeartGold & SoulSilver - Gen 5BW
Black & White - Gen 5B2W2
Black 2 & White 2 - Gen 6XY
X & Y - Gen 6ORAS
Omega Ruby & Alpha Sapphire - Gen 7SM
Sun & Moon - Gen 7USUM
Ultra Sun & Ultra Moon - Gen 7LGPE
Let's Go Pikachu & Eevee - Gen 8SwSh
Sword & Shield - Gen 8BDSP
Brilliant Diamond & Shining Pearl - Gen 8PLA
Legends: Arceus - Gen 9SV
Scarlet & Violet - Gen 9LZA
Legends: Z-A - Gen 10WW
Winds & Waves