#138 Omanyte All 251 Pokémon #140 Kabuto

Gengar’s Pokédex · Kanto · Generation I

#139 Omastar

RockWater

SpeciesSpiral Pokémon
Japanese nameOmstar
PronunciationAHM-UH-STAR
Height3′ 3″ 0.99 m
Weight77.0 lb 34.65 kg
Gender♂ 87.5% · ♀ 12.5%

Pokédex Where to find Type matchups Moves Breeding Stats

Name meaning

Combination of OMANITE (from which Omastar evolves) and STAR meaning “hero”.

Evolution

OmanyteLevel 40Omastar

Omastar in the original Gengar’s Pokédex — Omastar as it appeared in the original Gengar’s Pokédex

Pokédex entries

RedBlue	A prehistoric POKEMON that died out when its heavy shell made it impossible to catch prey.
Yellow	Sharp beaks ring its mouth. Its shell was too big for it to move freely, so it became extinct.
Stadium	Attacks by ensnaring its enemy with its tentacles and biting with sharp fangs. Its overly-large shell makes it sluggish.
GoldStadium 2	Apparently, it cracked SHELLDER’s shell with its sharp fangs and sucked out the insides.
Silver	Once wrapped around its prey, it never lets go. It eats the prey by tearing at it with sharp fangs.
Crystal	Its heavy shell allowed it to reach only nearby food. This could be the reason it is extinct.

Where to find Omastar

Game	Where to find it	Time	Rarity
Blue	Must Evolve from Omanyte at level 40	NA	Evolve
Red		NA	Evolve
Yellow		NA	Evolve
Gold		Any	Evolve
Silver		Any	Evolve
Crystal		Any	Evolve

How to catch

	Ground	Surf	Fishing	Forest Tree	Mountain Tree	Rock Smash	Breed	Evolve	Event	BugCatch	Game Corner
R/B								✓
Yellow								✓
G/S								✓
Crystal								✓

✓ marks how you can get it in each game. Shaded boxes are methods that didn’t exist in that game.

Type matchups

Defence: damage taken from each attack type

Normal×0.5
Fire×0.25
Water×1
Electric×2
Grass×4
Ice×0.5
Fighting×2
Poison×0.5
Ground×2
Flying×0.5
Psychic×1
Bug×1
Rock×1
Ghost×1
Dragon×1
Dark×1
Steel×1

Gold, Silver & Crystal: 4 weaknesses and 5 resistances out of 17 types. Defence ratio 4 : 5 (80%).
Red, Blue & Yellow: 4 weaknesses and 5 resistances out of 15 types. Defence ratio 4 : 5 (80%).
This Pokémon has the same weaknesses and resistances in GSC as RBY. So both defense ratios are the same.

Offence: same-type attacks against each type

Normal1st: Normal 2nd: Normal
Fire1st: Good 2nd: Good
Water1st: Normal 2nd: Bad
Electric1st: Normal 2nd: Normal
Grass1st: Normal 2nd: Bad
Ice1st: Good 2nd: Normal
Fighting1st: Bad 2nd: Normal
Poison1st: Normal 2nd: Normal
Ground1st: Bad 2nd: Good
Flying1st: Good 2nd: Normal
Psychic1st: Normal 2nd: Normal
Bug1st: Good 2nd: Normal
Rock1st: Normal 2nd: Good
Ghost1st: Normal 2nd: Normal
Dragon1st: Normal 2nd: Bad
Dark1st: Normal 2nd: Normal
Steel1st: Bad 2nd: Normal

Gold, Silver & Crystal: 7 advantages and 6 disadvantages out of 34 types. Offensive ratio 7:6 (~116.67%).
Red, Blue & Yellow: 7 advantages and 5 disadvantages out of 30 types. Offensive ratio 7:5 (140%).

Moves learned by levelling up

R/B/Y	G/S/C	Move	Type	Kind
—	Start	Constrict	Normal	Physical
Start	Start	Withdraw	Water	Status
—	Start	Bite	DarkG/S/C NormalR/B/Y	Special
Start	Start	Water Gun	Water	Special
Start	—	Horn Attack	Normal	Physical
Start	Start	Leer	Normal	Status
—	Start	Protect	Normal	Status
44	40	Spike Cannon	Normal	Physical
—	54	Ancient Power	Rock	Physical
49	65	Hydro Pump	Water	Special

“Start” means it knows the move from level 1; a dash means it doesn’t learn the move by levelling up in that game.

Move Tutor Crystal

Ice Beam

TMs & HMs Gold, Silver & Crystal

TM02Headbutt
TM03Curse
TM04Rollout
TM06Toxic
TM08Rock Smash
TM10Hidden Power
TM13Snore
TM14Blizzard
TM15Hyper Beam
TM16Icy Wind
TM17Protect
TM18Rain Dance
TM20Endure
TM21Frustration
TM27Return
TM32Double Team
TM34Swagger
TM35Sleep Talk
TM37Sandstorm
TM44Rest
TM45Attract
TM46Thief
HM03Surf
HM06Whirlpool

TMs & HMs Red, Blue & Yellow

TM06Toxic
TM07Horn Drill
TM08Body Slam
TM09Take Down
TM10Double-Edge
TM11Bubblebeam
TM12Water Gun
TM13Ice Beam
TM14Blizzard
TM15Hyper Beam
TM17Submission
TM19Seismic Toss
TM20Rage
TM31Mimic
TM32Double Team
TM33Reflect
TM34Bide
TM40Skull Bash
TM44Rest
TM50Substitute
HM03Surf

Breeding Gold, Silver & Crystal

Egg groups	Water 1 Pokémon group 8 Water 3 Pokémon group 10

Compatible Pokémon

Egg moves

Move	How to pass it down
Aurora Beam	Mate with a male from Remoraid, Seel, or Shellder Family.
Bubblebeam	Mate with a male from Marill, Remoraid, or Tentacool Family; or Corsola, Mantine.
Haze	Mate with a male Wooper/Quagsire.
Slam	Mate with a male from Dratini or Wooper Family.
Supersonic	Mate with a male from Shellder or Tentacool Family; or Mantine.

Stats

Stat	Base	Range at Lv. 100	G/S/C rank	R/B/Y rank
HP	70	313-343	23/4553.98%	20/4257.93%
Attack	60	188-218	28/4934.46%	28/4530.85%
Defense	125	318-348	7/5596.77%	4/4498.21%
Speed	55	178-208	32/4732.66%	30/4229.14%
Special Attack G/S/C	115	298-328	6/4696.41%	—
Special Defense G/S/C	70	208-238	21/4151.99%	—
Special R/B/Y	115	298-328	—	6/2994.52%
Total	495 G/S/C 425 R/B/Y	1503-1683 1295-1445	15/8780.20%	12/6584.13%

Ranges are the lowest and highest the stat can be at level 100. Ranks compare the base stat with every other Pokémon in those games (1 is the highest), with its percentile underneath.

Restored from Gengar’s Online Pokédex v4.2, one of the first Pokédexes on the web, created by Curtis Alumbaugh (Gengar) with Ian Alumbaugh (Haunter) and kept by Pokémon Dungeon. How to read this page · Red, Blue & Yellow moves · The Library