That 4x Grass weakness is something every Omastar user needs to plan around. Known as the Spiral Pokemon. The stat spread leans into special offense.
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.
Sharp beaks ring its mouth. Its shell was too big for it to move freely, so it became extinct.
Omastar Weakness
VulnerableOmastar's Rock/Water typing leaves it vulnerable to Grass, Electric, Fighting, and Ground moves. 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.
- Only 15 types exist — Dark, Steel, and Fairy are absent
- Ghost has no effect on Psychic (a known bug, fixed in Gen II)
- Special stat governs both offense and defense — no Sp.Atk / Sp.Def split
Evolve Omanyte at level 40 to get Omastar. At 495 stats, this Rock/Water type caps the chain without any egg option. HP grew the most through evolution (+35 over Omanyte), and Omastar peaks at 495 total stats.
How to Evolve
an item and an ability form the backbone. Omastar invests flexible EVs EVs to play its attacker role properly, and a nature nature pushes higher. Surf handles the heavy lifting on offense. Ice coverage rounds it out.
Best Build
Best Omastar Moveset
- Hydro Pump
- Blizzard
- Rest
- Surf
Recommended Teammates
Level-up moves are just the starting point for Omastar. TMs unlock Normal and Ice coverage and turn a straightforward STAB kit around Hydro Pump and Surf into something with actual range.
Level-Up Moves
TM Moves
Egg Moves
Tutor Moves
You're catching Omanyte first, not Omastar. Omanyte appears but it's a rare spawn in the encounters below. The step cards map the full 2-stage line with evolution methods between each stage.
How to Obtain Omastar in Yellow
Step 1Catch OmanyteMODERATECinnabar Island - Pokémon LabGift from NPCLv.30LimitedMidWaterRevive Helix Fossil
Step 2Omastar ✓
Swift Swim changes the entire equation for Omastar. The 495 BST doesn't tell the full story. Ranked C-Tier as a wallbreaker.
Omanyte evolves into Omastar at level 40. Omastar is the fully evolved form. At 495 BST, it's got solid stats to work with.
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.
Omastar appears in 19 games, including Yellow, Red & Blue, and Gold & Silver.
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.
- Gen IY
Yellow - Gen IRBDebut
Red & Blue - Gen IIGS
Gold & Silver - Gen IIC
Crystal - Gen IIIRS
Ruby & Sapphire - Gen IIIFRLG
FireRed & LeafGreen - Gen IIIE
Emerald - Gen IVPt
Platinum - Gen IVHGSS
HeartGold & SoulSilver - Gen IVDP
Diamond & Pearl - Gen VBW
Black & White - Gen VB2W2
Black 2 & White 2 - Gen VIXY
X & Y - Gen VIORAS
Omega Ruby & Alpha Sapphire - Gen VIIUSUM
Ultra Sun & Ultra Moon - Gen VIISM
Sun & Moon - Gen VIILGPE
Let's Go Pikachu & Eevee - Gen VIIISwSh
Sword & Shield - Gen VIIIPLA
Legends: Arceus - Gen VIIIBDSP
Brilliant Diamond & Shining Pearl - Gen IXSV
Scarlet & Violet - Gen IXLZA
Legends: Z-A