Cloyster

Cloyster is a Water/Ice type Pokémon introduced in Generation 1. It is known as the Bivalve Pokémon.

Cloyster

Pokédex data

National №	091
Type	Water Ice
Species	Bivalve Pokémon
Height	4′11″ (1.50m)
Weight	292.1 lbs (132.5 kg)
Abilities	Shell Armor Skill Link Overcoat (hidden ability)
Local №	091 (Red/Blue/Yellow/FireRed/LeafGreen) 170 (Gold/Silver/Crystal) 172 (HeartGold/SoulSilver) 037 (X/Y) 116 (Sun/Moon)
Japanese	Parushen

Training

EV yield	2 Defense
Catch rate	60 (7.8% with PokéBall, full HP)
Base Happiness	70 (normal)
Base EXP	203
Growth Rate	Slow

Breeding

Egg Groups	Water 3
Gender	50% male, 50% female
Egg cycles	20 (base 5,120 steps)

Base stats

Total	525	Min	Max
HP	50	210	304
Attack	95	175	317
Defense	180	328	504
Sp. Atk	85	157	295
Sp. Def	45	85	207
Speed	70	130	262

The ranges shown on the right are for a level 100 Pokémon. Maximum values are based on a beneficial nature, 252 EVs, 31 IVs; minimum values are based on a hindering nature, 0 EVs, 0 IVs.

Type defenses

The effectiveness of each type on Cloyster.

Nor	Fir	Wat	Ele	Gra	Ice	Fig	Poi	Gro
		½	2	2	¼	2

Fly	Psy	Bug	Roc	Gho	Dra	Dar	Ste	Fai
			2

Pokédex entries

Red Blue	When attacked, it launches its horns in quick volleys. Its innards have never been seen.
Yellow	For protection, it uses its harder-than-diamonds shell. It also shoots spikes from the shell.
Gold	Once it slams its shell shut, it is impossible to open, even by those with superior strength.
Silver	CLOYSTER that live in seas with harsh tidal currents grow large, sharp spikes on their shells.
Crystal	Even a missile can't break the spikes it uses to stab opponents. They're even harder than its shell.
Ruby Sapphire	CLOYSTER is capable of swimming in the sea. It does so by swallowing water, then jetting it out toward the rear. This POKéMON shoots spikes from its shell using the same system.
FireRed	Its shell is extremely hard. It cannot be shattered, even with a bomb. The shell opens only when it is attacking.
LeafGreen	When attacked, it launches its horns in quick volleys. Its innards have never been seen.
Emerald	It swims in the sea by swallowing water, then jetting it out toward the rear. The CLOYSTER shoots spikes from its shell using the same system.
Diamond Pearl Platinum	It fights by keeping its shell tightly shut for protection and by shooting spikes to repel foes.
HeartGold	Once it slams its shell shut, it is impossible to open, even by those with superior strength.
SoulSilver	CLOYSTER that live in seas with harsh tidal currents grow large, sharp spikes on their shells.
Black White Black 2 White 2	It fights by keeping its shell tightly shut for protection and by shooting spikes to repel foes.
X	Cloyster that live in seas with harsh tidal currents grow large, sharp spikes on their shells.
Y	Its shell is extremely hard. It cannot be shattered, even with a bomb. The shell opens only when it is attacking.
Omega Ruby Alpha Sapphire	Cloyster is capable of swimming in the sea. It does so by swallowing water, then jetting it out toward the rear. This Pokémon shoots spikes from its shell using the same system.
Sun	Its hard shell cannot be shattered—not even by a bomb. The contents of the shell remain unknown.
Moon	Excavation of the tombs of ancient hunting tribes has turned up many spears tipped with spikes that had fallen off this Pokémon’s shell.

Evolution chart

#090
Shellder
Water
(use Water Stone)

#091
Cloyster
Water · Ice

Name origin

clam: marine creature
oyster: marine creature
cloister: isolated religious building

Moves learnt by level up

Cloyster learns the following moves in Pokémon Sun/Moon at the levels specified.

Lv.	Move	Type	Power	Acc.
1	Aurora Beam	Ice	65	100
1	Hydro Pump	Water	110	80
1	Protect	Normal	—	—
1	Shell Smash	Normal	—	—
1	Supersonic	Normal	—	55
1	Toxic Spikes	Poison	—	—
1	Withdraw	Water	—	—
13	Spike Cannon	Normal	20	100
28	Spikes	Ground	—	—
50	Icicle Crash	Ice	85	90

Egg moves

Cloyster learns the following moves via breeding in Pokémon Sun/Moon. Details and compatible parents can be found on the Cloyster egg moves page.

Move	Type	Power	Acc.
Aqua Ring	Water	—	—
Avalanche	Ice	60	100
Barrier	Psychic	—	—
Bubble Beam	Water	65	100
Icicle Spear	Ice	25	100
Mud Shot	Ground	55	95
Rapid Spin	Normal	20	100
Rock Blast	Rock	25	90
Screech	Normal	—	85
Take Down	Normal	90	85
Twineedle	Bug	25	100
Water Pulse	Water	60	100

Moves learnt by TM

Cloyster is compatible with these Technical Machines in Pokémon Sun/Moon:

TM	Move	Type	Power	Acc.
6	Toxic	Poison	—	90
7	Hail	Ice	—	—
10	Hidden Power	Normal	60	100
13	Ice Beam	Ice	90	100
14	Blizzard	Ice	110	70
15	Hyper Beam	Normal	150	90
17	Protect	Normal	—	—
18	Rain Dance	Water	—	—
21	Frustration	Normal	—	100
27	Return	Normal	—	100
32	Double Team	Normal	—	—
41	Torment	Dark	—	100
42	Facade	Normal	70	100
44	Rest	Psychic	—	—
45	Attract	Normal	—	100
48	Round	Normal	60	100
64	Explosion	Normal	250	100
66	Payback	Dark	50	100
67	Smart Strike	Steel	70	—
68	Giga Impact	Normal	150	90
79	Frost Breath	Ice	60	90
84	Poison Jab	Poison	80	100
87	Swagger	Normal	—	85
88	Sleep Talk	Normal	—	—
90	Substitute	Normal	—	—
94	Surf	Water	90	100
100	Confide	Normal	—	—

Moves learnt by level up

Cloyster learns the following moves in Pokémon Omega Ruby/Alpha Sapphire at the levels specified.

Lv.	Move	Type	Power	Acc.
1	Aurora Beam	Ice	65	100
1	Hydro Pump	Water	110	80
1	Protect	Normal	—	—
1	Shell Smash	Normal	—	—
1	Supersonic	Normal	—	55
1	Toxic Spikes	Poison	—	—
1	Withdraw	Water	—	—
13	Spike Cannon	Normal	20	100
28	Spikes	Ground	—	—
50	Icicle Crash	Ice	85	90

Egg moves

Cloyster learns the following moves via breeding in Pokémon Omega Ruby/Alpha Sapphire. Details and compatible parents can be found on the Cloyster egg moves page.

Move	Type	Power	Acc.
Aqua Ring	Water	—	—
Avalanche	Ice	60	100
Barrier	Psychic	—	—
Bubble Beam	Water	65	100
Icicle Spear	Ice	25	100
Mud Shot	Ground	55	95
Rapid Spin	Normal	20	100
Rock Blast	Rock	25	90
Screech	Normal	—	85
Take Down	Normal	90	85
Twineedle	Bug	25	100
Water Pulse	Water	60	100

Move Tutor moves

Cloyster can be taught these attacks in Pokémon Omega Ruby/Alpha Sapphire from move tutors (details):

Move	Type	Power	Acc.
Icy Wind	Ice	55	95
Iron Defense	Steel	—	—
Signal Beam	Bug	75	100
Snore	Normal	50	100
Water Pulse	Water	60	100

Pre-evolution moves

These moves can only be learned in Pokémon Omega Ruby/Alpha Sapphire by a previous evolution of Cloyster. Check the respective Pokédex for the exact details.

Move	Type	Power	Acc.	Method
Brine	Water	65	100	Level up
Clamp	Water	35	85	Level up
Ice Beam	Ice	90	100	Level up
Ice Shard	Ice	40	100	Level up
Icicle Spear	Ice	25	100	Level up
Iron Defense	Steel	—	—	Level up
Leer	Normal	—	100	Level up
Razor Shell	Water	75	95	Level up
Tackle	Normal	40	100	Level up
Whirlpool	Water	35	85	Level up

Moves learnt by HM

Cloyster is compatible with these Hidden Machines in Pokémon Omega Ruby/Alpha Sapphire:

HM	Move	Type	Cat.	Power	Acc.
3	Surf	Water		90	100
7	Dive	Water		80	100

Moves learnt by TM

Cloyster is compatible with these Technical Machines in Pokémon Omega Ruby/Alpha Sapphire:

TM	Move	Type	Power	Acc.
6	Toxic	Poison	—	90
7	Hail	Ice	—	—
10	Hidden Power	Normal	60	100
13	Ice Beam	Ice	90	100
14	Blizzard	Ice	110	70
15	Hyper Beam	Normal	150	90
17	Protect	Normal	—	—
18	Rain Dance	Water	—	—
21	Frustration	Normal	—	100
27	Return	Normal	—	100
32	Double Team	Normal	—	—
41	Torment	Dark	—	100
42	Facade	Normal	70	100
44	Rest	Psychic	—	—
45	Attract	Normal	—	100
48	Round	Normal	60	100
64	Explosion	Normal	250	100
66	Payback	Dark	50	100
68	Giga Impact	Normal	150	90
79	Frost Breath	Ice	60	90
84	Poison Jab	Poison	80	100
87	Swagger	Normal	—	85
88	Sleep Talk	Normal	—	—
90	Substitute	Normal	—	—
94	Secret Power	Normal	70	100
100	Confide	Normal	—	—

Transfer-only moves

Cloyster can only learn these moves in previous generations. It must be taught the moves in the appropriate game and then transferred to Pokémon Omega Ruby/Alpha Sapphire.

Move	Type	Power	Acc.	Method
Double-Edge	Normal	120	100	Generation 3 — Move tutor
Mimic	Normal	—	—	Generation 3 — Move tutor
Captivate	Normal	—	100	Generation 4 — TM
Natural Gift	Normal	—	100	Generation 4 — TM
Swift	Normal	60	∞	Generation 4 — Move tutor

Cloyster sprites

Type	Generation 1	Generation 2	Generation 3	Generation 4	Generation 5	Generation 6	Generation 7
Normal							—
Shiny	—						—

See all Cloyster sprites

Where to find Cloyster

Red Blue Yellow	Evolve Shellder
Gold Silver Crystal	Evolve Shellder
Ruby Sapphire	Trade/migrate from another game
FireRed	Evolve Shellder
LeafGreen Emerald	Trade/migrate from another game
Diamond Pearl Platinum HeartGold SoulSilver	Evolve Shellder
Black White	Route 13, Undella Bay, Undella Town
Black 2 White 2	Route 13, Undella Town, Humilau City, Seaside Cave
X	Trade/migrate from another game
Y	Route 8
Omega Ruby Alpha Sapphire	Trade/migrate from another game
Sun Moon	Evolve Shellder

Cloyster

Pokédex data

Training

Breeding

Base stats

Type defenses

Pokédex entries

Evolution chart

Name origin

Moves learned by Cloyster

Moves learnt by level up

Egg moves

Moves learnt by TM

Moves learnt by level up

Egg moves

Move Tutor moves

Pre-evolution moves

Moves learnt by HM

Moves learnt by TM

Transfer-only moves

Cloyster sprites

Where to find Cloyster

Answers to Cloyster questions