Is Onix Good in Ultra Sun & Ultra Moon Playthrough?
Rock/Ground found only through Island Scan at Ten Carat Hill, 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.
Steelix has the type edge here and should bring the Totem Araquanid down.
Steelix trades roughly evenly with the Totem Alolan Marowak.
The Totem Lurantis hits Steelix's weaknesses hard.
Steelix trades roughly evenly with Olivia's team.
The Totem Togedemaru's typing presses Steelix's defenses.
The Totem Mimikyu hits Steelix's weaknesses hard.
Steelix trades roughly evenly with Nanu's team.
The Totem Kommo-o hits Steelix's weaknesses hard.
Steelix trades roughly evenly with the Totem Ribombee.
Hapu's team hits Steelix's weaknesses hard.
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 Hau's team.
Catchable
Catch Onix on Ten Carat Hill (walking, Lv 14). Island Scan; Tuesday.
Evolve Onix to Steelix
Onix evolves into Steelix when traded. Most players are ready to trade before reaching Lana.
How to Get Onix in Ultra Sun & Ultra Moon
Onix is not part of Ten Carat Hill's normal lineup. Run an Island Scan there on a Tuesday and the rock snake surfaces for a short window, ready to battle at level 14 before it slips away.
Where To Catch Onix in USUM
- Step 2Evolve into Steelix
Want the exact numbers? Work out your catch odds in Ultra Sun & Ultra Moon for Onix.
How to Get Shiny Onix in Ultra Sun & Ultra Moon
Onix comes to Alola via Island Scan alone, making Masuda breeding with a foreign parent the shiny route to 1 in 512. Compare Shiny Onix odds across every game
Ultra Sun & Ultra Moon Shiny Onix Calculator
2 MethodsThe best route is Masuda Method at full boosts, about 1 in 512 on each try. Tune it below.
Masuda Method: Breed with a parent from a different-language game. Works on any breedable line.
Island Scan: Scan QR codes to charge an Island Scan, then hunt the rare spawn it reveals for the next hour at standard odds.
How many you have done, or plan to do.
| Chance | Encounters |
|---|---|
| 10%lucky few | 54 |
| 25%one in four | 148 |
| 50%coin flip | 355 |
| 90%very likely | 1,178 |
How is this calculated?
Every encounter has the same shiny chance, the Shiny Odds Per Try shown above. Each one is a separate roll that does not care how many you have already done, so the more you hunt, the higher your overall chance of at least one shiny. The formula below turns your odds and your number of tries into that combined chance.
chance after N tries = 1 − (1 − p)^N, where p = 1 / odds per try
Example at 1 in 8,192 (classic full odds): about 864 encounters for a 10 percent chance, 5,678 for 50 percent, and 18,862 for 90 percent.
The table above flips that around: it shows how many encounters it takes to reach a 10, 25, 50, and 90 percent chance at your current odds. Turning on boosts like the Shiny Charm, sandwiches, or chains improves your odds, so the encounter numbers drop.
These are estimates, not promises. Most games have no pity counter, meaning no guaranteed shiny no matter how many you hunt, so even Very Likely is not guaranteed: some hunters find one early, others go well past that point.
Curious how fast a hunt could go? Work out your Ultra Sun & Ultra Moon shiny odds for Onix.
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 | |
 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% | ||
 Machop Fighting | C | |
 Mankey Fighting | C | |
 Wartortle Water | C | |
Available Moves Moves
Damage vs Onix View Wartortle builds →Water Gun 4x121-143%KO Brick Break 2x26-33% | ||
 Psyduck Water | D | |
Available Moves Moves
Damage vs Onix View Psyduck builds →Water Pulse 4x169-200%KO Brick Break 2x26-33% | ||
 Popplio Water | D | |
Obtain MethodRoute 1 Gift Available Moves Moves
Damage vs Onix View Popplio builds →Water Gun 4x121-143%KO Icy Wind 2x52-62% | ||
 Rowlet Grass | D | |
Obtain MethodRoute 1 Gift | ||
 Jynx IcePsychic | C | |
Available Moves Moves
Damage vs Onix View Jynx builds →Frost Breath 2x121-143%KO Brick Break 2x24-29% | ||
 Wingull Water | C | |
 Makuhita Fighting | C | |
 Petilil Grass | C | |
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
Breeding
Breed Onix easily with 58 breeding partners from the Mineral egg group. Pass egg moves like Block, Defense Curl, Flail and 7 more to offspring.
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
No. Onix only evolves into Steelix through a real trade. There is no in-game alternative in Ultra Sun & Ultra Moon. The Metal Coat must be held during the trade. Bring one over from a sibling Gen 3 game if needed.
In Ultra Sun & Ultra Moon, 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.
Weak Armor is the hidden ability. Raises Speed and lowers Defense by one stage each upon being hit by a physical move. Not always the best choice. Compare it to Onix's regular abilities before committing.
In Ultra Sun & Ultra Moon, use Onix as a balanced. Splits damage between physical and special. Speed is middling,
For Ultra Sun & Ultra Moon, run Hardy on Onix. Fits the balanced role.
Game Availability
Present since Red & Blue, Onix appears in 21 games spanning 9 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 7Let's Go
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
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