Cloyster

Contents
Info
Base stats
Evolution chart
Pokédex entries
Moves learned
Sprites
Locations
Language

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

Pokédex data

National №	091
Type	Water Ice
Species	Bivalve Pokémon
Height	1.5 m (4′11″)
Weight	132.5 kg (292.1 lbs)
Abilities	1. Shell Armor 2. Skill Link Overcoat (hidden ability)
Local №	091 (Red/Blue/Yellow) 170 (Gold/Silver/Crystal) 091 (FireRed/LeafGreen) 172 (HeartGold/SoulSilver) 037 (X/Y — Coastal Kalos) 116 (Sun/Moon — Alola dex) 139 (U.Sun/U.Moon — Alola dex) 091 (Let's Go Pikachu/Let's Go Eevee)

Training

EV yield	2 Defense
Catch rate	60 (7.8% with PokéBall, full HP)
Base Friendship	70 (normal)
Base Exp.	184
Growth Rate	Slow

Breeding

Egg Groups	Water 3
Gender	50% male, 50% female
Egg cycles	20 (4,884–5,140 steps)

Base stats

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
Total	525	Min	Max

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

Evolution chart

#090
Shellder
Water

(use Water Stone)

#091
Cloyster
Water · Ice

Cloyster changes

In Generation 3, Cloyster does not have the Skill Link ability.
In Generation 1, Cloyster has a base Special stat of 85.
In Generations 1-4, Cloyster has a base experience yield of 203.

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.
Ultra Sun	If areas of Cloyster’s very hard shell get damaged, those areas swell, gradually growing into large sharp spikes.
Ultra Moon	Slowpoke tails are its favorite food. It has even been known to come up on land to look for Slowpoke from time to time.
Let's Go Pikachu Let's Go Eevee	For protection, it uses its harder-than-diamonds shell. It also shoots spikes from the shell.

Moves learned by Cloyster

In other generations
1
2
3
4
5
6
7

Let's Go Pikachu/Let's Go Eevee Ultra Sun/Ultra Moon

Moves learnt by level up

Cloyster learns the following moves in Pokémon Let's Go Pikachu & Let's Go Eevee at the levels specified.

Lv.	Move	Type	Power	Acc.
1	Barrier	Psychic	—	—
1	Leer	Normal	—	100
1	Spike Cannon	Normal	20	100
1	Tackle	Normal	40	100
1	Twineedle	Bug	25	100
1	Water Gun	Water	40	100
1	Withdraw	Water	—	—

Moves learnt on evolution

Cloyster learns the following moves when it evolves in Pokémon Let's Go Pikachu & Let's Go Eevee (regardless of level).

Move	Type	Cat.	Power	Acc.
Spike Cannon	Normal		20	100

Moves learnt by TM

Cloyster is compatible with these Technical Machines in Pokémon Let's Go Pikachu & Let's Go Eevee:

TM	Move	Type	Power	Acc.
01	Headbutt	Normal	70	100
04	Teleport	Psychic	—	—
05	Rest	Psychic	—	—
07	Protect	Normal	—	—
08	Substitute	Normal	—	—
09	Reflect	Psychic	—	—
12	Facade	Normal	70	100
26	Poison Jab	Poison	80	100
27	Toxic	Poison	—	90
28	Tri Attack	Normal	80	100
42	Self-Destruct	Normal	200	100
47	Surf	Water	90	100
48	Hyper Beam	Normal	150	90
51	Blizzard	Ice	110	70
55	Ice Beam	Ice	90	100

Moves learnt by level up

Cloyster learns the following moves in Pokémon Ultra Sun & Ultra 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 Ultra Sun & Ultra 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

Move Tutor moves

Cloyster can be taught these attacks in Pokémon Ultra Sun & Ultra Moon from move tutors (details):

Move	Type	Power	Acc.
Icy Wind	Ice	55	95
Iron Defense	Steel	—	—
Liquidation	Water	85	100
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 Ultra Sun & Ultra Moon 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
Water Gun	Water	40	100	Level up
Whirlpool	Water	35	85	Level up

Moves learnt by TM

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

TM	Move	Type	Power	Acc.
06	Toxic	Poison	—	90
07	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	—	—

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 Ultra Sun & Ultra Moon.
Note: Generation 1 and 2 refer to the 3DS Virtual Console titles, not the physical cartridges.

Move	Type	Power	Acc.	Method
Bide	Normal	—	—	Generation 1 — TM
Rage	Normal	20	100	Generation 1 — TM
Reflect	Psychic	—	—	Generation 1 — TM
Self-Destruct	Normal	200	100	Generation 1 — TM
Teleport	Psychic	—	—	Generation 1 — TM
Tri Attack	Normal	80	100	Generation 1 — TM
Curse	Ghost	—	—	Generation 2 — TM
Double-Edge	Normal	120	100	Generation 3 — Move tutor
Mimic	Normal	—	—	Generation 3 — Move tutor
Captivate	Normal	—	100	Generation 4 — TM
Endure	Normal	—	—	Generation 4 — TM
Natural Gift	Normal	—	100	Generation 4 — TM
Swift	Normal	60	∞	Generation 4 — Move tutor
Secret Power	Normal	70	100	Generation 6 — TM
Dive	Water	80	100	Generation 6 — HM

In other generations
1
2
3
4
5
6
7

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 Ultra Sun Ultra Moon	Evolve Shellder
Let's Go Pikachu Let's Go Eevee	Seafoam Islands

Answers to Cloyster questions

Other languages

English	Cloyster
Japanese	パルシェン (Parshen)
German	Austos
French	Crustabri

Name origin

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