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.
It is thought that this Pokémon became extinct because its spiral shell grew too large.
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 |
- Fairy type does not exist — Dragon has fewer checks
- Physical / Special split now per-move (introduced Gen IV)
In Platinum, Infernape can KO Omastar with Close Combat (100-117%). Zapdos threatens a KO with Thunderbolt (112-132%).
 Infernape FireFighting | A | |
Recommended Build AbilityBlaze ItemExpert Belt NatureJolly Moves
Damage vs Omastar View Infernape builds →Close Combat 2x100-117%KO U Turn20-23% Fire Blast13-15% | ||
 Zapdos Electric | A | |
Recommended Build AbilityPressure ItemLeftovers NatureBold Moves
Damage vs Omastar View Zapdos builds →Thunderbolt 2x112-132%KO Heat Wave10-11% | ||
 | B | |
Recommended Build AbilityKeeneye ItemLeftovers NatureImpish Moves View Skarmory builds →
| ||
 Roserade GrassPoison | B | |
Recommended Build AbilityNatural Cure ItemBlack Sludge NatureTimid Moves View Roserade builds →
| ||
Platinum 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 69 partners from the Water1 and Water3 egg groups. Notable egg moves include Aurora Beam, Bubble Beam, Haze and 7 more.
Platinum Omastar Best Moveset
Life Orb 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
- Surf
- Ice Beam
- Rain Dance
- Hidden Power Grass
Recommended Teammates
Moves
You'll want to breed for Aurora Beam and Bubble Beam 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 Platinum
Omastar doesn't appear wild. Catch Omanyte instead, it shows up but it's a rare spawn. Evolve it at level 40 to get Omastar. The 2-stage line is mapped in the step cards below.
How to Obtain Omastar in Platinum
Step 1Catch OmanyteOreburgh City - Mining MuseumGift from NPC Lv.20 CityLimitedMidRevive Helix Fossil
Step 2Omastar ✓
Omastar Guide
In Platinum, Swift Swim changes the entire equation for Omastar. The 495 BST doesn't tell the full story. Ranked C-Tier as a wallbreaker. Surf with Life Orb 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.
In Platinum, run Surf, Ice Beam, Raindance, and Hiddenpowergrass on Omastar. Surf is the most common pick at 23% usage. Surf provides reliable STAB damage.
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