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.
Omastar uses its tentacles to capture its prey. It is believed to have become extinct because its shell grew too large and heavy, causing its movements to become too slow and ponderous.
Omastar uses its tentacles to capture its prey. It is believed to have become extinct because its shell grew too large and heavy, causing its movements to become too slow and ponderous.
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 |
In Omega Ruby & Alpha Sapphire, Serperior can KO Omastar with Leaf Storm (267-314%). Garchomp threatens a KO with Earthquake (97-114%). Zapdos's Thunderbolt also KOs at 112-132%.
 Serperior Grass | A | |
Recommended Build AbilityContrary ItemLeftovers NatureTimid Moves
Damage vs Omastar View Serperior builds →Leaf Storm 4x267-314%KO | ||
 Garchomp DragonGround | A | |
Recommended Build AbilityRough Skin ItemRocky Helmet NatureJolly Moves
Damage vs Omastar View Garchomp builds →Earthquake 2x97-114%KO | ||
 Zapdos Electric | A | |
Recommended Build AbilityStatic ItemSitrus Berry NatureTimid Moves
Damage vs Omastar View Zapdos builds →Heat Wave10-11% Thunderbolt 2x112-132%KO | ||
 Hitmontop Fighting | B | |
Recommended Build AbilityIntimidate ItemEjectbutton NatureAdamant Moves
Damage vs Omastar View Hitmontop builds →Close Combat 2x102-121%KO Feint4-5% | ||
Omega Ruby & Alpha Sapphire 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 87 partners from the Water1 and Water3 egg groups. Notable egg moves include Aurora Beam, Bide, Bubble Beam and 11 more.
Omega Ruby & Alpha Sapphire Omastar Best Moveset
White Herb and Swiftswim form the backbone. Omastar invests max Sp. Atk and Speed EVs to play its special attacker role properly, and Modest nature pushes Sp. Atk higher. Surf handles the heavy lifting on offense. The remaining moves rounds it out.
Best Build
Omastar best EVs are Sp. Atk and Speed
Special Sweeper Moveset
- Shell Smash
- Ice Beam
- Surf
- 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 Omega Ruby & Alpha Sapphire
Can't catch Omastar directly. Start with Omanyte at moderate rates from the locations below, then evolve at level 40. The 2-stage line from Omanyte to Omastar is where the leveling time goes.
How to Obtain Omastar in Omega Ruby & Alpha Sapphire
Step 1Catch OmanyteRustboro City - Devon CorporationOmega RubyGift from NPC Lv.20 CityMidOne-timeRevive Helix FossilRustboro City - Devon CorporationAlpha SapphireGift from NPC Lv.20 CityMidOne-timeRevive Helix Fossil
Step 2Omastar ✓
Omastar Guide
In Omega Ruby & Alpha Sapphire, Swift Swim changes the entire equation for Omastar. The 495 BST doesn't tell the full story. Ranked C-Tier as a wallbreaker. Shellsmash with White Herb 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 Omega Ruby & Alpha Sapphire, 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