Is Omastar Good in Yellow Playthrough?
Stronger on the special side than Kabutops. Omastar hits hard and the Rock typing covers matchups most Water-types can't reach. Late-game specialist that adds depth to your E4 lineup.
Omanyte resists most of Brock's coverage and hits back hard.
Misty's typing presses Omanyte's defenses.
Lt. Surge's team hits Omanyte's weaknesses hard.
Erika's team hits Omanyte's weaknesses hard.
Omanyte trades roughly evenly with Koga's team.
Omanyte trades roughly evenly with Sabrina's team.
Omastar resists most of Blaine's coverage and hits back hard.
Omastar has the type edge here and should clean up Giovanni's team.
Lorelei's typing presses Omastar's defenses.
Omastar has the type edge here and should clean up Bruno's team.
Omastar trades roughly evenly with Agatha's team.
Omastar trades roughly evenly with Lance's team.
Omastar trades roughly evenly with Blue's team.
Fossil Omanyte
Omanyte can be revived from a fossil obtained on Cinnabar Island. Revive Helix Fossil. Revive the Helix Fossil at the Pokemon Lab on Cinnabar Island. The Helix Fossil is found at the end of Mt. Moon. Choose between it or the Dome Fossil.
Recommended Moves
- After Misty
- TM11WaterBubble BeamPower 98Accuracy 100%PP 20Prize for defeating Cerulean Gym Leader Misty
- TM08NormalBody SlamPower 85Accuracy 100%PP 15S.S. Anne
- After Lt. Surge
- TM10NormalDouble-EdgePower 100Accuracy 100%PP 15Rocket Hideout
- TM13IceIce BeamPower 95Accuracy 100%PP 10Celadon Department Store roof
- TM09NormalTake DownPower 90Accuracy 85%PP 20Silph Co.
- After Erika
- HM03WaterSurfPower 143Accuracy 100%PP 15Safari Zone
- After Sabrina
- TM14IceBlizzardPower 120Accuracy 90%PP 5Pokémon Mansion
- LV 53WaterHydro PumpPower 180Accuracy 80%PP 5
Evolve Omanyte to Omastar
Omanyte evolves into Omastar at Level 40. Your Omanyte should hit Level 40 before you reach Blaine, at typical leveling pace.
Recommended Moves
- After Misty
- TM11WaterBubble BeamPower 98Accuracy 100%PP 20Prize for defeating Cerulean Gym Leader Misty
- After Lt. Surge
- TM15NormalHyper BeamPower 150Accuracy 90%PP 5Rocket Game Corner
- TM10NormalDouble-EdgePower 100Accuracy 100%PP 15Rocket Hideout
- TM13IceIce BeamPower 95Accuracy 100%PP 10Celadon Department Store roof
- After Erika
- HM03WaterSurfPower 143Accuracy 100%PP 15Safari Zone
- TM40NormalSkull BashPower 100Accuracy 100%PP 15Safari Zone
- LV 49WaterHydro PumpPower 180Accuracy 80%PP 5
- After Sabrina
- TM14IceBlizzardPower 120Accuracy 90%PP 5Pokémon Mansion
How to Get Omastar in Yellow
Omastar only follows from that revived Omanyte, growing in at level 40. No wild spiral shell exists, so the whole line rests on having picked the Helix Fossil.
Catch Omanyte at any of these 1 spot to eventually evolve into Omastar.
- 1Catch Omanyte
- 2Evolve Omastarat Lv.40
Badge 6How to Obtain Omastar in Y
- Step 2Omastar ✓
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 overall bulk (70/125/115) lets it take a hit or two from most weaknesses before going down.
| Damage | Types |
|---|---|
| 4x (Critical) | Grass |
| 2x (Weak) | Electric, Fighting, Ground |
| 0.5x (Resist) | Normal, Ice, Poison, Flying |
| 0.25x (Resist) | Fire |
- 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
What is Omastar Weak Against
VulnerableBest Pokemon Against Omastar
 Venusaur GrassPoison | C | |
Obtain MethodEvolve Bulbasaur (Cerulean City Gift) | ||
 Tangela Grass | C | |
 Exeggutor GrassPsychic | S | |
 Vileplume GrassPoison | C | |
 Victreebel GrassPoison | C | |
 Parasect BugGrass | C | |
Available Moves Moves
Damage vs Omastar View Parasect builds →Solar Beam 4x116-137%KO Dig 2x42-50% | ||
 Jolteon Electric | A | |
Obtain MethodEvolve Eevee (Celadon City Gift) Available Moves Moves
Damage vs Omastar View Jolteon builds →Thunderbolt 2x74-87% Double Kick 2x10-12% | ||
 Magneton Electric | C | |
 Sandslash Ground | C | |
Available Moves Moves
Damage vs Omastar View Sandslash builds →Earthquake 2x66-79% Submission 2x36-43% | ||
 Raichu Electric | C | |
Obtain MethodEvolve Pichu (Pallet Town Gift) Available Moves Moves
Damage vs Omastar View Raichu builds →Thunderbolt 2x63-74% Submission 2x32-39% | ||
 Nidoking PoisonGround | C | |
Available Moves Moves
Damage vs Omastar View Nidoking builds →Earthquake 2x68-81% Thunderbolt 2x39-47% Submission 2x36-43% | ||
 Rhydon GroundRock | S | |
Available Moves Moves
Damage vs Omastar View Rhydon builds →Earthquake 2x82-97% Submission 2x44-52% Thunderbolt 2x26-30% | ||
 Primeape Fighting | C | |
Available Moves Moves
Damage vs Omastar View Primeape builds →Dig 2x46-54% Submission 2x56-66% Thunderbolt 2x30-36% | ||
 Nidoqueen PoisonGround | C | |
Available Moves Moves
Damage vs Omastar View Nidoqueen builds →Earthquake 2x61-72% Thunderbolt 2x36-43% Submission 2x34-40% | ||
Omastar Evolutions
The Rock/Water-type Omastar caps Omanyte's chain at 540 stats. No daycare options for this one. Special grew the most through evolution (+60 over Omanyte), and Omastar peaks at 540 total stats. View every chain in the Evolution Chart.
How to Evolve
Y Omastar Best Moveset
115 Special fires MoveSurf and MoveBlizzard hard enough to compete with the mid-tier Water-types. Rock/Water gives an unusual type combination with useful resistances but a devastating 4x Grass weakness. The Special stat carries the offense while the typing creates the risk.
Best Build
Utility Moveset
- Hydro Pump
- Blizzard
- Rest
- Surf
Recommended Teammates
Moves List
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.
How to Read the Moves Table
Tabs
- Level-Up
- Learned by leveling up.
- TM
- Taught by a Technical Machine.
- 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.
Tier (S to D)
Each move's competitive rank in RankedBoost's system. TM 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 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
All 21 TMs are obtainable before the Elite Four
Tutor Moves
Base Stats
Sharp beaks ring its mouth. Its shell was too big for it to move freely, so it became extinct.
Omastar Yellow Guide
In Yellow, use Omastar as a wallbreaker. Splits damage between physical and special. Not the fastest, Surf is the primary attack.
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 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
Explore
Where to go next after Omastar.
Keep playing · YellowYellow Tier ListThe best Pokemon ranked tier by tierSee Yellow Tier List