For Crystal, we rate Omastar C-Tier: a niche pick in Crystal's meta. At 495 BST, it fits the support role. Hydro Pump with Leftovers is the standard set.

What is Omastar weak to?

In Crystal, watch for Exeggutor (Grass), Raikou (Electric), and Machamp (Fighting) when using Omastar. They all hit it super-effectively with STAB. Exeggutor is the most dangerous since Grass moves deal 4x damage. Ground-type attackers are also a problem.

What role does Omastar play in battle?

At base 55 Speed, it won't be moving first often. On offense, Omastar is a mixed attacker with base 60 Attack and 115 Sp. Atk. Defensively? Enough bulk to take a hit or two. Best used as a support.

What are the best moves for Omastar?

In Crystal, run Hydro Pump, Ice Beam, Reflect, and Raindance on Omastar. Hydro Pump is the most common pick at 21% usage. This set covers the support role with a mix of damage and utility.

What counters Omastar?

For Crystal, Omastar has answers, but so do you. Super-effective STAB from faster Pokemon is the simplest answer. Grass, Electric, and Fighting-type attackers hit hardest.

Omastar - Weakness, Evolution, Moveset, EVs & Stats

Mixed

Support

CTier

55Speed · Slow

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 stat exp. Follows a medium-fast 1M XP curve.

Base Stats

Above

HP70

Attack60

Defense125

Sp. Atk115

Sp. Def70

Speed55

Total495

Details

Catch Rate

Challenging45 / 255

Growth Rate

Medium Fast1M XP

Height1.0 m

Weight35.0 kg

Base XP173

Abilities

Abilities were introduced in Generation III. Shown below for reference.

Swift Swim

Doubles Speed during rain.

Shell Armor

Protects against critical hits.

Weak ArmorHA

Raises Speed and lowers Defense by one stage each upon being hit by a physical move.

EV Yield

HPAtkDef+2SpASpDSpe

Defense training target

Pokedex Entries

Its heavy shell allowed it to reach only nearby food. This could be the reason it is extinct.

Crystal

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.

Omastar Weakness and Resistance Chart
Damage	Types
4x (Critical)	Grass
2x (Weak)	Electric, Fighting, Ground
0.5x (Resist)	Normal, Ice, Poison, Flying
0.25x (Resist)	Fire

Type ChartVulnerable

4Weak

5Resist

0Immune

Score-4

Gen II Type Chart

Dark and Steel types added — Fairy does not exist yet
Moves are Physical or Special based on type, not per move
Special stat split into Sp.Atk and Sp.Def

4xCritical

Grass

2xWeak

Electric Fighting Ground

½xResist

Normal Ice Poison Flying

¼xResist

Fire

0xImmune

None

STAB (6)

Fire Ice Flying Bug Ground Rock

How to Beat Omastar in Crystal (Best Counters)

In Crystal, Machamp's Earthquake hits Omastar for 53-63%. Golem's Earthquake hits Omastar for 75-89%. Jolteon's Thunderbolt also KOs at 101-119%.

Machamp Fighting	A
Recommended Build ItemLeftovers Moves Cross Chop Rock Slide Earthquake CurseSetup Damage vs Omastar Rock Slide 20-24% Earthquake 2x 53-63% View Machamp builds →
Golem RockGround	A
Recommended Build ItemLeftovers Moves EarthquakeSTAB Explosion Rapid Spin RoarUtility Damage vs Omastar Earthquake 2x 75-89% Explosion 31-36% Rapid Spin 6-7% View Golem builds →
Jolteon Electric	A
Recommended Build ItemLeftovers Moves ThunderboltSTAB Baton Pass Thunder Wave GrowthSetup Damage vs Omastar Thunderbolt 2x 101-119%KO View Jolteon builds →
Venusaur GrassPoison	C
Recommended Build ItemLeftovers Moves Leech Seed Sleep Powder Giga Drain SynthesisRecovery Damage vs Omastar Giga Drain 4x 156-184%KO View Venusaur builds →

Crystal Evolution

Evolved from Omanyte. Omastar is the final form in this two-stage line. A decent partner pool 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

2 Forms

#138Omanyte

Level 40

#139Omastar

Stat Comparison 2 Stages

Omanyte

RockWater

Omastar

RockWater

70+35

ATK

60+20

DEF

100

125+25

SP.ATK

115+25

SP.DEF

70+15

SPE

55+20

BST

355D-Tier

495C-Tier+140

ROLE

Trick Room

Wallbreaker

TYPE

Special

Breeding

Moderate

Breed with Omastar to get Omanyte eggs using 37 partners from the Water1 and Water3 egg groups. Notable egg moves include Aurora Beam, Bubble Beam, Haze and 2 more.

Egg Groups

Water1Water3

Gender

♂87.5%♀12.5%

Hatch Time

30 cycles·7,710 steps

Moderate~8 min with Flame Body

Egg Moves

5moves

Breed With (best first)

Crystal Omastar Best Moveset

Best Build

Experimental

Screens Setter

Ability

Not in Gen 2

Item

LeftoversSUSTAIN

Nature

Not in Gen 2

Screens Setter Moveset

Hydro PumpSTAB
Ice Beam
ReflectUtility
Rain DanceSTAB

Recommended Teammates

NidokingDecent

PiloswineDecent

SnorlaxDecent

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 Surf, they expand what Omastar can actually threaten in practice.

Level-Up Moves

Lv 1

Bite

D6010025Dark

Lv 1

Constrict

—1010035Normal

Lv 1

Withdraw

———40Water

Lv 13

Bite

D6010025Dark

Lv 19

Water Gun

C4010025Water

Lv 31

Leer

——10030Normal

Lv 37

Protect+4

C——10Normal

Lv 40

Spike Cannon

—2010015Normal

Lv 54

Ancient Power

C601005Rock

Lv 65

Hydro Pump

S120805Water

TM Moves

TM45

Attract

D—10015Normal

TM14

Blizzard

C120705Ice

TM03

Curse

C——10Ghost

TM32

Double Team

———15Normal

TM20

Endure+4

D——10Normal

TM21

Frustration

D—10020Normal

TM02

Headbutt

D7010015Normal

TM10

Hidden Power

—6010015Normal

TM15

Hyper Beam

B150905Normal

TM16

Icy Wind

C559515Ice

TM17

Protect+4

C——10Normal

TM18

Rain Dance

A——5Water

TM44

Rest

A——10Psychic

TM27

Return

D—10020Normal

TM08

Rock Smash

—2010015Fighting

TM04

Rollout

D309020Rock

TM37

Sandstorm

D——10Rock

TM35

Sleep Talk

C——10Normal

TM13

Snore

—4010015Normal

HM03

Surf

B9510015Water

TM34

Swagger

C—8515Normal

TM46

Thief

D6010025Dark

TM06

Toxic

C—8510Poison

HM06

Whirlpool

D358515Water

Egg Moves

Egg

Aurora Beam

—6510020Ice

Egg

Bubble Beam

—6510020Water

Egg

Haze

C——30Ice

Egg

Slam

—807520Normal

Egg

Supersonic

——5520Normal

Tutor Moves

Tut

Tutor

Ice Beam

S9510010Ice

How to Get Omastar in Crystal

No wild encounters for Omastar in Crystal. Bring Omanyte over from Red, Yellow, or Sword, then level through the stages. Each step in the chain is laid out below.

How to Obtain Omastar in Crystal

Step 1Obtain Omanyte
Also found in:
Red Yellow FireRed Diamond Platinum HeartGold
Train until Level 40
Step 2Omastar ✓

Omastar Guide

For Crystal, we rate Omastar C-Tier: a niche pick in Crystal's meta. At 495 BST, it fits the support role. Hydro Pump with Leftovers is the standard set.
In Crystal, watch for Exeggutor (Grass), Raikou (Electric), and Machamp (Fighting) when using Omastar. They all hit it super-effectively with STAB. Exeggutor is the most dangerous since Grass moves deal 4x damage. Ground-type attackers are also a problem.
At base 55 Speed, it won't be moving first often. On offense, Omastar is a mixed attacker with base 60 Attack and 115 Sp. Atk. Defensively? Enough bulk to take a hit or two. Best used as a support.
In Crystal, run Hydro Pump, Ice Beam, Reflect, and Raindance on Omastar. Hydro Pump is the most common pick at 21% usage. This set covers the support role with a mix of damage and utility.
For Crystal, Omastar has answers, but so do you. Super-effective STAB from faster Pokemon is the simplest answer. Grass, Electric, and Fighting-type attackers hit hardest.

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

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