In Brilliant Diamond & Shining Pearl, Swift Swim changes the entire equation for Omastar. The 495 BST doesn't tell the full story. Ranked C-Tier as a hazard setter. Earthpower with Focus Sash is the standard set.

What is Omastar weak to?

In Brilliant Diamond & Shining Pearl, 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 is the best ability for Omastar?

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.

What role does Omastar play in battle?

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 hazard setter.

What are the best moves for Omastar?

In Brilliant Diamond & Shining Pearl, run Earthpower, Shellsmash, Ice Beam, and Scald on Omastar. Earthpower is the most common pick at 23% usage. Scald provides reliable STAB damage.

Omastar - Weakness, Evolution, Moveset, EVs & Stats

Special

Hazard Setter

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 EVs. 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

Swift SwimNiche

Doubles Speed during rain.

Shell Armor

Protects against critical hits.

Weak ArmorHATop Pick

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

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.

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

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 Brilliant Diamond & Shining Pearl (Best Counters)

In Brilliant Diamond & Shining Pearl, Rillaboom threatens a KO with Wood Hammer (247-290%). Cobalion's Close Combat also KOs at 91-107%.

HeatranThreatens with Earth Power, outspeeds FireSteel	S
Recommended Build AbilityFlashfire ItemLeftovers NatureTimid Moves Earth Power Magma Storm Stealth Rock TauntUtility View Heatran builds →
Rillaboom Grass	A
Recommended Build AbilityGrassy Surge ItemAssault Vest NatureAdamant Moves Fake Out Grassy Glide U Turn Wood Hammer Damage vs Omastar U Turn 24-28% Wood Hammer 4x 247-290%KO View Rillaboom builds →
Cobalion SteelFighting	A
Recommended Build AbilityJustified ItemRocky Helmet NatureJolly Moves Close Combat Swords Dance Iron Head Stealth Rock Damage vs Omastar Close Combat 2x 91-107%KO View Cobalion builds →
Zeraora Electric	A
Recommended Build AbilityVoltabsorb ItemAir Balloon NatureJolly Moves Plasma Fists Fake Out Drain Punch Fire Punch Damage vs Omastar Drain Punch 2x 44-52% View Zeraora builds →
Regieleki Electric	A
Recommended Build AbilityTransistor ItemMagnet NatureTimid Moves Volt Switch ProtectPriority ElectrowebSTAB ThunderboltSTAB Damage vs Omastar Volt Switch 2x 91-108%KO Electroweb 2x 73-85% Thunderbolt 2x 117-138%KO View Regieleki builds →

Brilliant Diamond & Shining Pearl 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

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 69 partners from the Water1 and Water3 egg groups. Notable egg moves include Aurora Beam, Bite, Bubble Beam and 10 more.

Egg Groups

Water1Water3

Gender

♂87.5%♀12.5%

Hatch Time

30 cycles·7,710 steps

Moderate~8 min with Flame Body

Egg Moves

13moves

Breed With (best first)

Brilliant Diamond & Shining Pearl Omastar Best Moveset

One guaranteed turn is all Omastar needs. Focus Sash buys it, max Sp. Atk and Speed EVs make it count, and Weakarmor adds something extra. The goal: deal early damage and deal damage with Scald. The remaining moves gives it play beyond just the lead turn.

Best Build

Experimental

Ability

Weak Armor

Item

Focus SashSURVIVAL

Best Nature for Omastar

Timid+SPE

Omastar best EVs are Sp. Atk and Speed

EVs

SpA

SpD

Spe

Special Sweeper Moveset

Earth Power
Shell Smash
Ice Beam
ScaldSTAB

Recommended Teammates

EspeonGood

DragoniteGood

Moves

You'll want to breed for Aurora Beam and Bite 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

Lv 1

Bind

—158520Normal

Lv 1

Crunch

D8010015Dark

Lv 1

Rollout

—309020Rock

Lv 1

Sand Attack

D—10015Ground

Lv 1

Withdraw

———40Water

Lv 15

Water Gun

—4010025Water

Lv 20

Leer

D—10030Normal

Lv 25

Mud Shot

C559515Ground

Lv 30

Ancient Power

C601005Rock

Lv 35

Brine

C6510010Water

Lv 43

Protect+4

C——10Normal

Lv 49

Rock Blast

D259010Rock

Lv 56

Surf

S9010015Water

Lv 63

Shell Smash

S——15Normal

Lv 70

Hydro Pump

B110805Water

TM Moves

TM45

Attract

C—10015Normal

TM14

Blizzard

C110705Ice

TM55

Brine

C6510010Water

TM32

Double Team

———15Normal

TM58

Endure+4

C——10Normal

TM42

Facade

D7010020Normal

TM68

Giga Impact

C150905Normal

TM74

Gyro Ball

D—1005Steel

TM07

Hail

C——10Ice

TM15

Hyper Beam

B150905Normal

TM13

Ice Beam

S9010010Ice

TM17

Protect+4

C——10Normal

TM18

Rain Dance

C——5Water

TM44

Rest

C——10Psychic

TM100

Rock Climb

—908520Normal

TM69

Rock Polish

C——20Rock

TM80

Rock Slide

C759010Rock

TM98

Rock Smash

D4010015Fighting

TM39

Rock Tomb

D609515Rock

TM37

Sandstorm

D——10Rock

TM49

Scald

S8010015Water

TM82

Sleep Talk

C——10Normal

TM76

Stealth Rock

C——20Rock

TM71

Stone Edge

C100805Rock

TM90

Substitute

C——10Normal

TM95

Surf

S9010015Water

TM87

Swagger

D—8515Normal

TM46

Thief

D6010025Dark

TM03

Water Pulse

C6010020Water

TM99

Waterfall

C8010015Water

Egg Moves

Egg

Aurora Beam

C6510020Ice

Egg

Bite

D6010025Dark

Egg

Bubble Beam

C6510020Water

Egg

Haze

C——30Ice

Egg

Knock Off

D6510020Dark

Egg

Muddy Water

B908510Water

Egg

Reflect Type

———15Normal

Egg

Slam

—807520Normal

Egg

Spikes

S——20Ground

Egg

Supersonic

D—5520Normal

Egg

Tickle

D—10020Normal

Egg

Toxic Spikes

C——20Poison

Egg

Whirlpool

D358515Water

Tutor Moves

Omastar can't learn any Tutor moves

How to Get Omastar in Brilliant Diamond & Shining Pearl

No wild encounters for Omastar in Brilliant Diamond & Shining Pearl. 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 Brilliant Diamond & Shining Pearl

Step 1Obtain Omanyte
Catch in the wild in:
SwordSurfing · Roaring-Sea Caves · Overcast
Then trade to Brilliant Diamond & Shining Pearl to continue the evolution chain.
Also found in:
Red Yellow FireRed Diamond Platinum HeartGold
Train until Level 40
Step 2Omastar ✓

Omastar Guide

In Brilliant Diamond & Shining Pearl, Swift Swim changes the entire equation for Omastar. The 495 BST doesn't tell the full story. Ranked C-Tier as a hazard setter. Earthpower with Focus Sash is the standard set.
In Brilliant Diamond & Shining Pearl, 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.
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.
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 hazard setter.
In Brilliant Diamond & Shining Pearl, run Earthpower, Shellsmash, Ice Beam, and Scald on Omastar. Earthpower is the most common pick at 23% usage. Scald 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

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