Stats & Training
Defense and Sp. Atk carry most of Omastar's stat budget. Speed's the obvious dump stat. Tough to catch and yields 2 Defense EVs. Follows a medium-fast 1M XP curve.
Its heavy shell is thought to be the reason this ancient Pokémon died out. It’s apparently a distant ancestor of Octillery.
It wraps its prey in its tentacles to immobilize them and then finishes them off with its sharp fangs.
Omastar Weakness
Omastar's Rock/Water typing leaves it vulnerable to Grass, Electric, Fighting, and Ground. Grass hits land at 4x, so they're the biggest threat. 5 resistances help offset the weaknesses. Omastar's physical bulk (base 125 Def) helps cushion physical weakness hits, but special attackers are the bigger threat.
| Damage | Types |
|---|---|
| 4x (Critical) | Grass |
| 2x (Weak) | Electric, Fighting, Ground |
| 0.5x (Resist) | Normal, Ice, Poison, Flying |
| 0.25x (Resist) | Fire |
 Sceptile Grass | C | |
Available Moves Moves
Damage vs Omastar View Sceptile builds →Leaf Storm 4x285-335%KO Leaf Blade 4x106-124%KO Energy Ball 4x200-236%KO Brick Break 2x29-34% | ||
 Decidueye GrassGhost | C | |
Obtain MethodEvolve Rowlet (Route 1 Gift) Available Moves Moves
Damage vs Omastar View Decidueye builds →Leaf Storm 4x274-323%KO Leaf Blade 4x126-149%KO Energy Ball 4x190-223%KO Razor Leaf 4x81-95% | ||
 Leafeon Grass | C | |
Obtain MethodEvolve Eevee (Paniola Ranch Gift) Available Moves Moves
Damage vs Omastar View Leafeon builds →Leaf Blade 4x130-153%KO Energy Ball 4x130-153%KO Giga Drain 4x109-128%KO Magical Leaf 4x88-103%KO | ||
 Cradily RockGrass | C | |
Obtain MethodEvolve Lileep (Route 8 Gift) Available Moves Moves
Damage vs Omastar View Cradily builds →Energy Ball 4x161-190%KO Giga Drain 4x137-161%KO | ||
 Lurantis Grass | C | |
Obtain MethodHeahea Beach Gift Available Moves Moves
Damage vs Omastar View Lurantis builds →Solar Blade 4x172-203%KO Petal Blizzard 4x126-149%KO Leaf Blade 4x126-149%KO Energy Ball 4x161-190%KO | ||
In Ultra Sun & Ultra Moon, Cobalion's Close Combat hits Omastar for 83-98%. Tapu Koko's Thunderbolt also KOs at 131-154%.
 Cobalion SteelFighting | A | |
Recommended Build AbilityJustified ItemFightiniumz NatureJolly Moves
Damage vs Omastar View Cobalion builds →Close Combat 2x83-98% Stone Edge23-27% | ||
 Ferrothorn GrassSteel | A | |
Recommended Build AbilityIron Barbs ItemLeftovers NatureSassy Moves View Ferrothorn builds →
| ||
 Tapu Koko ElectricFairy | A | |
Recommended Build AbilityElectric Surge ItemChoice Specs NatureTimid Moves
Damage vs Omastar View Tapu Koko builds →Thunderbolt 2x131-154%KO Volt Switch 2x101-120%KO Dazzling Gleam58-68% | ||
 Swampert WaterGround | A | |
Recommended Build AbilityTorrent ItemLife Orb NatureAdamant Moves
Damage vs Omastar View Swampert builds →Earthquake 2x114-134%KO Scald33-39% Waterfall46-54% | ||
Ultra Sun & Ultra Moon Evolution
Evolved from Omanyte. Omastar is the final form in this two-stage line. Plenty of partners for breeding via two egg groups. Eggs are slow to hatch. HP grew the most through evolution (+35 over Omanyte), and Omastar peaks at 495 total stats. View every chain in the Evolution Chart.
How to Evolve
Breeding
Breed with Omastar to get Omanyte eggs using 95 partners from the Water1 and Water3 egg groups. Notable egg moves include Aurora Beam, Bide, Bubble Beam and 11 more.
Ultra Sun & Ultra Moon Omastar Best Moveset
Ice coverage gives Omastar answers even while choice-locked. Choice Specs provides boosted special damage with move lock, and max Sp. Atk without Speed EVs with Shellarmor mean every prediction that lands hits hard.
Best Build
Omastar best EVs are Sp. Atk and Sp. Def
Doubles Special Wallbreaker Moveset
- Blizzard
- Earth Power
- Scald
- Hydro Pump
Recommended Teammates
Special Sweeper Moveset
- Ice Beam
- Surf
- Shell Smash
- Earth Power
Recommended Teammates
Moves
You'll want to breed for Aurora Beam and Bide on Omastar. These egg moves aren't just nice to have. Combined with STAB from Hydro Pump and Stone Edge, they expand what Omastar can actually threaten in practice.
Level-Up Moves
TM Moves
Egg Moves
Tutor Moves
Transfer Moves
How to Get Omastar in Ultra Sun & Ultra Moon
You're catching Omanyte first, not Omastar. Omanyte appears at moderate rates in the encounters below. The step cards map the full 2-stage line with evolution methods between each stage.
How to Obtain Omastar in Ultra Sun & Ultra Moon
Step 1Catch OmanyteRoute 8 - Fossil Restoration CenterUltra SunGift from NPC Lv.15 RouteEarlyRevive Helix FossilRoute 8 - Fossil Restoration CenterUltra MoonGift from NPC Lv.15 RouteEarlyRevive Helix Fossil
Step 2Omastar ✓
Omastar Guide
In Ultra Sun & Ultra Moon, Swift Swim changes the entire equation for Omastar. The 495 BST doesn't tell the full story. Ranked C-Tier as a wallbreaker. Blizzard with Choice Specs is the standard set.
Swift Swim is what you want on Omastar. Every competitive set worth running is built with that ability in mind. The alternatives (Shell Armor, Weak Armor) work on paper but Swift Swim is what makes Omastar worth using. On wall sets, Swift Swim pairs with Omastar's base 125 Defense to absorb physical hits on the switch.
At base 55 Speed, it won't be moving first often. On offense, Omastar is a special attacker with base 115 Sp. Atk. Defensively? Enough bulk to take a hit or two. Best used as a wallbreaker.
For Ultra Sun & Ultra Moon, Omastar has answers, but so do you. Status moves (Toxic, Will-O-Wisp) wear it down. Setup sweepers can use it as a boost opportunity. Physical attackers can break through.
Game Availability
One of the original 151, Omastar has appeared in 19 games — most mainline games. From Red & Blue through the latest titles, it's rarely been left out of a regional Pokedex.
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