No. 0139

Omastar

Spiral Pokémon

Official art

Omastar is a Rock/Water-type Pokémon, 4× weak to Grass and 2× weak to Fighting, Ground and Electric, with a base stat total of 495. It isn’t usable in Pokémon Champions’ Regulation M-C.

Rock Water

Height: 1 m 3′03″
Weight: 35 kg 77.2 lbs
Base stat total: 495 Higher than 67% of Pokémon
Introduced: Gen I Red & Green (JP)

Abilities

Swift Swim Shell Armor Weak Armor

Pokédex entryShield

Omastar’s sharp fangs could crush rock, but the Pokémon can attack only the prey that come within reach of its tentacles.

See all 15 entries

Base stats

HP70145–177250–344

Atk6072–123112–240

Def125130–194229–383

SpA115121–183211–361

SpD7081–134130–262

Spe5567–117103–229

Total495Higher than 67% of Pokémon

Ranges in Pokémon Champions at Lv 50: 0 Stat Points with a −10% Stat Alignment to 32 Stat Points with a +10% one (HP has no alignment).Ranges in the main games at Lv 100: 0 IV/EV with a hindering nature to 31 IV/252 EV with a helpful nature. EV yield: 2 Def.

Stat calculatorChampions Stat Points & Stat Alignment, or EVs, IVs & nature

Calculate damage →

Type matchups

Colors show what this Pokémon takes

RockWatershow which type causes itweaknessresistance

Weak to

4×

Grass

2×

ElectricFightingGround

Resists

½×

FlyingIceNormalPoison

¼×

Fire

Takes normal damage from 9 types

RockBugGhostSteelWaterPsychicDragonDarkFairy

Speed tiers

The faster Pokémon moves first each turn, so knowing who you outspeed decides a lot of battles. These are its Speed values at Lv 50 in Pokémon Champions (base Speed 55); Choice Scarf and Tailwind use the Max+ value.

Max+117Max107No SP75Min67

Scarf175Tailwind234

At max Speed, Omastar outspeeds 11 of the 30 most used Pokémon in Champions VGC on Showdown.

Speed at Lv 50 in Pokémon Champions: Omastar against the 30 most used Pokémon in Champions VGC on Showdown, fastest first
Speed		Pokémon
203		Mega Garchomp ZModest · 32 SP · #21 on Showdown
200		Mega GengarTimid · 32 SP · #26 on Showdown
190		Mega Raichu YTimid · 23 SP · #13 on Showdown
189		Mega SalamenceTimid · 32 SP · #4 on Showdown
184		WhimsicottTimid · 32 SP · #23 on Showdown
178		Mega MetagrossJolly · 32 SP · #28 on Showdown
178		Mega StaraptorJolly · 32 SP · #29 on Showdown
172		SneaslerAdamant · 32 SP · #2 on Showdown
169		Mega FloetteTimid · 32 SP · #17 on Showdown
169		GarchompJolly · 32 SP · #19 on Showdown
167		Mega Charizard YTimid · 32 SP · #14 on Showdown
167		Mega GardevoirTimid · 32 SP · #20 on Showdown
161		IndeedeeTimid · 32 SP · #30 on Showdown
156		Hisuian ArcanineJolly · 32 SP · #16 on Showdown
150		ArchaludonTimid · 32 SP · #9 on Showdown
149		GholdengoTimid · 32 SP · #8 on Showdown
143		BasculegionJolly · 32 SP · #6 on Showdown
128		PelipperTimid · 32 SP · #12 on Showdown
120		VolcaronaBold · 0 SP · #25 on Showdown
117		Omastar · Max+32 SP, Speed-raising alignment
107		Omastar · Max32 SP, neutral alignment
105		RillaboomAdamant · 0 SP · #1 on Showdown
101		MiloticCalm · 0 SP · #15 on Showdown
95		SylveonModest · 15 SP · #18 on Showdown
94		Female IndeedeeRelaxed · 0 SP · #7 on Showdown
90		PolitoedCalm · 0 SP · #22 on Showdown
90		SinistchaBold · 0 SP · #24 on Showdown
85		ArmarougeQuiet · 0 SP · #27 on Showdown
80		IncineroarCareful · 0 SP · #3 on Showdown
80		FarigirafBold · 0 SP · #11 on Showdown
75		Omastar · No SP0 SP, neutral alignment
70		KingambitAdamant · 0 SP · #5 on Showdown
60		Mega GolisopodAdamant · 0 SP · #10 on Showdown

Smogon · Showdown Others at their most common Speed investment in Champions VGC (Reg M-C · Doubles, Sep 2026); Pokémon holding a Mega Stone are shown as their Mega.

Abilities

Swift Swim
If Rain is active, this Pokémon's Speed is doubled.
Other Pokémon with Swift Swim 44
Psyduck Golduck Poliwag Poliwhirl Poliwrath Horsea Goldeen Seaking Magikarp Omanyte Kabuto Kabutops Qwilfish Mantine Kingdra Mega Swampert Lotad Lombre Ludicolo Surskit Anorith Armaldo Feebas Huntail Gorebyss Relicanth Luvdisc Buizel Floatzel Finneon Lumineon Mantyke Tympole Palpitoad Seismitoad Tirtouga Carracosta Beartic Chewtle Drednaw Arrokuda Barraskewda Basculegion Overqwil
Shell Armor
This Pokémon cannot be struck by a critical hit.
Other Pokémon with Shell Armor 28
Mega Slowbro Shellder Cloyster Krabby Kingler Lapras Omanyte Torkoal Corphish Crawdaunt Clamperl Turtwig Grotle Torterra Oshawott Dewott Samurott Mega Scolipede Dwebble Crustle Escavalier Shelmet Hisuian Sliggoo Hisuian Goodra Turtonator Chewtle Drednaw Klawf
Weak Armor, hidden ability
If a physical attack hits this Pokémon, Defense is lowered by 1, Speed is raised by 2.
Other Pokémon with Weak Armor 23
Onix Omanyte Kabuto Kabutops Slugma Magcargo Galarian Corsola Skarmory Roggenrola Boldore Dwebble Crustle Garbodor Vanillite Vanillish Vanilluxe Vullaby Mandibuzz Sinistea Polteageist Cursola Armarouge Ceruledge

Competitive

Smogon · Showdown On Showdown

Not used in the tracked Showdown formats this month.

Other Showdown formats Scarlet & Violet, with Tera

National DexRU

Evolution

#0138OmanyteRockWater
1. Level 40
  #0139OmastarRockWater

Moves

Level up 16


Evo	Crunch20% chance to lower the target's Defense by 1.	Dark	Physical	80	100%	15
1	BindTraps and damages the target for 4-5 turns.	Normal	Physical	15	85%	20
1	Crunch20% chance to lower the target's Defense by 1.	Dark	Physical	80	100%	15
1	RolloutPower doubles with each hit. Repeats for 5 turns.	Rock	Physical	30	90%	20
1	Sand AttackLowers the target's accuracy by 1.	Ground	Status	—	100%	15
1	WithdrawRaises the user's Defense by 1.	Water	Status	—	—	40
15	Water GunNo additional effect.	Water	Special	40	100%	25
20	LeerLowers the foe(s) Defense by 1.	Normal	Status	—	100%	30
25	Mud Shot100% chance to lower the target's Speed by 1.	Ground	Special	55	95%	15
30	Ancient Power10% chance to raise all stats by 1 (not acc/eva).	Rock	Special	60	100%	5
35	BrinePower doubles if the target's HP is 50% or less.	Water	Special	65	100%	10
43	ProtectPrevents moves from affecting the user this turn.	Normal	Status	—	—	10
49	Rock BlastHits 2-5 times in one turn.	Rock	Physical	25	90%	10
56	SurfHits adjacent Pokémon. Double damage on Dive.	Water	Special	90	100%	15
63	Shell SmashLowers Def, SpD by 1; raises Atk, SpA, Spe by 2.	Normal	Status	—	—	15
70	Hydro PumpNo additional effect.	Water	Special	110	80%	5

TM / HM / TR 30


TM49	Scald30% chance to burn the target. Thaws target.	Water	Special	80	100%	15
HM03	SurfHits adjacent Pokémon. Double damage on Dive.	Water	Special	90	100%	15
HM06	Rock Smash50% chance to lower the target's Defense by 1.	Fighting	Physical	40	100%	15
HM07	Waterfall20% chance to make the target flinch.	Water	Physical	80	100%	15
HM08	Rock Climb20% chance to confuse the target.	Normal	Physical	90	85%	20
TM	Ice Beam10% chance to freeze the target.	Ice	Special	90	100%	10
TM	Blizzard10% chance to freeze foe(s). Can't miss in Snow.	Ice	Special	110	70%	5
TM	Hyper BeamUser cannot move next turn.	Normal	Special	150	90%	5
TM	Double TeamRaises the user's evasiveness by 1.	Normal	Status	—	—	15
TM	RestUser sleeps 2 turns and restores HP and status.	Psychic	Status	—	—	5
TM	Rock Slide30% chance to make the foe(s) flinch.	Rock	Physical	75	90%	10
TM	SubstituteUser takes 1/4 its max HP to put in a substitute.	Normal	Status	—	—	10
TM	ThiefIf the user has no item, it steals the target's.	Dark	Physical	60	100%	25
TM	ProtectPrevents moves from affecting the user this turn.	Normal	Status	—	—	10
TM	SandstormFor 5 turns, a sandstorm rages. Rock: 1.5× SpD.	Rock	Status	—	—	10
TM	EndureUser survives attacks this turn with at least 1 HP.	Normal	Status	—	—	10
TM	SwaggerRaises the target's Attack by 2 and confuses it.	Normal	Status	—	85%	15
TM	AttractA target of the opposite gender gets infatuated.	Normal	Status	—	100%	15
TM	Sleep TalkUser must be asleep. Uses another known move.	Normal	Status	—	—	10
TM	Rain DanceFor 5 turns, heavy rain powers Water moves.	Water	Status	—	—	5
TM	HailFor 5 turns, hail crashes down.	Ice	Status	—	—	10
TM	FacadePower doubles if user is burn/poison/paralyzed.	Normal	Physical	70	100%	20
TM	Rock Tomb100% chance to lower the target's Speed by 1.	Rock	Physical	60	95%	15
TM	Water Pulse20% chance to confuse the target.	Water	Special	60	100%	20
TM	Gyro BallMore power the slower the user than the target.	Steel	Physical	—	100%	5
TM	BrinePower doubles if the target's HP is 50% or less.	Water	Special	65	100%	10
TM	Rock PolishRaises the user's Speed by 2.	Rock	Status	—	—	20
TM	Giga ImpactUser cannot move next turn.	Normal	Physical	150	90%	5
TM	Stone EdgeHigh critical hit ratio.	Rock	Physical	100	80%	5
TM	Stealth RockHurts foes on switch-in. Factors Rock weakness.	Rock	Status	—	—	20

Biology

Omastar uses its tentacles to capture its prey. It is believed that it went extinct because its shell grew too large and heavy, causing its movements to become too slow and clumsy. Once wrapped around its prey, it never lets go as it attacks by tearing into it with the sharp beaks that ring its mouth.

Adapted from Wikipedia: List of generation I Pokémon · CC BY-SA 4.0 · edited.

Polls & views

Official vote, Japan#552 of 720 in the 2016 Pokémon General Election 720 (Japan), tiedOfficial results, via Cinematoday

Each line is one source, as it published it. Polls counted every form under its species.

Pokédex entries

Category: Spiral Pokémon
Debut: Kanto · Red & Green (JP)
Color: Blue
Shape
Habitat: Sea
Pal Park area: Sea

Kanto#139Original Johto#221Updated Johto#226Updated Alola#228Updated Akala#129Let’s Go Kanto#139Crown Tundra#124

Omastar’s sharp fangs could crush rock, but the Pokémon can attack only the prey that come within reach of its tentacles.
Shield
Weighed down by a large and heavy shell, Omastar couldn’t move very fast. Some say it went extinct because it was unable to catch food.
Sword
Its sharp beak rings its mouth. Its shell was too big for it to move freely, so it became extinct.
Let’s Go, Pikachu! · Let’s Go, Eevee!
It wraps its prey in its tentacles to immobilize them and then finishes them off with its sharp fangs.
Ultra Moon
Its heavy shell is thought to be the reason this ancient Pokémon died out. It’s apparently a distant ancestor of Octillery.
Ultra Sun
It is thought that this Pokémon became extinct because its spiral shell grew too large.
Diamond · Pearl · Platinum · Black · White · Black 2 · White 2
Despite having strong fangs and tentacles, it went extinct when its heavy shell made it unable to catch prey.
LeafGreen
Its tentacles are highly developed as if they are hands and feet. As soon as it ensnares prey, it bites.
FireRed · X
An OMASTAR uses its tentacles to capture its prey. It is believed to have become extinct because its shell grew too large, making its movements slow and ponderous.
Emerald
Omastar uses its tentacles to capture its prey. It is believed to have become extinct because its shell grew too large and heavy, causing its movements to become too slow and ponderous.
Ruby · Sapphire · Omega Ruby · Alpha Sapphire
Its heavy shell allowed it to reach only nearby food. This could be the reason it is extinct.
Crystal
Once wrapped around its prey, it never lets go. It eats the prey by tearing at it with sharp fangs.
Silver · SoulSilver · Y
Apparently, it cracked SHELLDER’s shell with its sharp fangs and sucked out the insides.
Gold · HeartGold
Sharp beaks ring its mouth. Its shell was too big for it to move freely, so it became extinct.
Yellow
A prehistoric Pokémon that died out when its heavy shell made it impossible to catch prey.
Red · Blue

Names around the world

English: Omastar
Japanese: オムスター
Japanese (romaji): Omstar
Korean: 암스타
Chinese (Traditional): 多刺菊石獸
Chinese (Simplified): 多刺菊石兽
French: Amonistar
German: Amoroso
Spanish: Omastar
Italian: Omastar

Sprites

Artwork and 3D models

Gen VIII · Gen VII · Gen VI · Gen V

Generation IV

Generation III

Generation II

Generation I

Training

EV yield: 2 Def
Catch rate: 45 ≈5.9% with a Poké Ball at full HP
Base friendship: 70
Base experience: 173
Growth rate: Medium

Breeding

Egg groups: Water 1Water 3
Gender: ♂ 87.5%♀ 12.5%
Hatch time: 30 egg cycles ≈7,905 steps (Gen IV–VII)

Where to find

Evolves from Omanyte: Level 40.

Sword: The Crown Tundra 7 areas

Ballimere Lake (Max Den N)Catch a wild Dynamax or Gigantamax Pokémon in a Max Raid battle. · Lv 45–60
Frigid Sea (Max Den C)Catch a wild Dynamax or Gigantamax Pokémon in a Max Raid battle. · Lv 45–60
Giant's Bed (Max Den F)Catch a wild Dynamax or Gigantamax Pokémon in a Max Raid battle. · Lv 45–60
Giant's Bed (Max Den P)Catch a wild Dynamax or Gigantamax Pokémon in a Max Raid battle. · Lv 45–60
Giant's Foot (Max Den B)Catch a wild Dynamax or Gigantamax Pokémon in a Max Raid battle. · Lv 45–60
Roaring-Sea CavesSpecial overworld spawn in a fixed location. · Lv 68
Snowslide Slope (Max Den I)Catch a wild Dynamax or Gigantamax Pokémon in a Max Raid battle. · Lv 35–60

Locations cover Red & Blue to Sword & Shield (with its DLC) and Let’s Go. We don’t have them yet for Legends: Arceus, Brilliant Diamond & Shining Pearl, Scarlet & Violet and Legends: Z-A.