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#0091 · Generation I

Cloyster

Water / Ice · Bivalve Pokémon — first seen in Generation I.

Just:

Showing the official games. Pick a ROM hack to see how it changes this Pokémon, or compare all of them.

WaterIce

Sprites

Normal

Shiny

In the ROM hacks

Art by SourApple (SoupPotato) — the creators' own, served from this site.

Pokédex data

National №: #0091
Dex numbers: National #091 · Kanto #091 · Johto #170 · Updated Johto #172 · Kalos Coastal #037 · Original Alola #116 · Original Melemele #116 · Updated Alola #139 · Updated Melemele #139 · Let’s Go Kanto #091 · Galar #151 · Isle of Armor #132 · Paldea #330
Species: Bivalve Pokémon
Height: 1.5 m (4′11″)
Weight: 132.5 kg (292.1 lbs)
Base EXP: 184
Catch rate: 60
Base friendship: 70
Growth rate: Slow
Egg groups: Water 3
Egg cycles: 20
Gender: 50% male · 50% female
EV yield: 2 Defense

Abilities

Shell ArmorProtects against critical hits.

Skill LinkExtends two-to-five-hit moves and Triple Kick to their full length every time.

Overcoat hiddenProtects against damage from weather.

Base stats

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

Min and max are at level 100: the minimum is 0 IVs, 0 EVs and a hindering nature, the maximum 31 IVs, 252 EVs and a beneficial nature. Shedinja's HP is always 1 whatever the formula says.

Type defences

Damage Cloyster takes from each attacking type.

×2

FightingRockGrassElectric

×½

Water

×¼

Ice

×1

NormalFlyingPoisonGroundBugGhostSteelFirePsychicDragonDarkFairy

Evolution

Shellder#0090

Use Water Stone

Cloyster#0091

Methods are the current official ones. A ROM hack may change them — trade evolutions especially; the guide table below says which do.

In the ROM hacks it evolves differently

Each guide's own line, in the words its creator published.

In Pokemon Kanto Expansion Pak

Shellder

Evolves into Disturban with a Water Stone

DisturbanEvolves into Cloyster with a Ice Stone

Cloyster

In Pokémon Peridot Version

Shellder

Evolves into Cloyster with a Water Stone

CloysterEvolves into Concher when levelled up holding a Slowpoketail

Concher

Moves by official game

Level-up, TM/HM, tutor and egg moves exactly as each game has them. The newest game this site covers is open; the rest fold out.

Ultra Sun / Ultra Moon10 level-up · 27 TM/HM · 6 tutor

Level-up

Lv	Move	Type	Cat.	Power	Acc.	PP
1	Supersonic	Normal	Status	—	55%	20
1	Hydro Pump	Water	Special	110	80%	5
1	Aurora Beam	Ice	Special	65	100%	20
1	Withdraw	Water	Status	—	—	40
1	Protect	Normal	Status	—	—	10
1	Toxic Spikes	Poison	Status	—	—	20
1	Shell Smash	Normal	Status	—	—	15
13	Spike Cannon	Normal	Physical	20	100%	15
28	Spikes	Ground	Status	—	—	20
50	Icicle Crash	Ice	Physical	85	90%	10

TM & HM

TM	Move	Type	Cat.	Power	Acc.	PP
TM06	Toxic	Poison	Status	—	90%	10
TM07	Hail	Ice	Status	—	—	10
TM10	Hidden Power	Normal	Special	60	100%	15
TM100	Confide	Normal	Status	—	—	20
TM13	Ice Beam	Ice	Special	90	100%	10
TM14	Blizzard	Ice	Special	110	70%	5
TM15	Hyper Beam	Normal	Special	150	90%	5
TM17	Protect	Normal	Status	—	—	10
TM18	Rain Dance	Water	Status	—	—	5
TM21	Frustration	Normal	Physical	—	100%	20
TM27	Return	Normal	Physical	—	100%	20
TM32	Double Team	Normal	Status	—	—	15
TM41	Torment	Dark	Status	—	100%	15
TM42	Facade	Normal	Physical	70	100%	20
TM44	Rest	Psychic	Status	—	—	5
TM45	Attract	Normal	Status	—	100%	15
TM48	Round	Normal	Special	60	100%	15
TM64	Explosion	Normal	Physical	250	100%	5
TM66	Payback	Dark	Physical	50	100%	10
TM67	Smart Strike	Steel	Physical	70	—	10
TM68	Giga Impact	Normal	Physical	150	90%	5
TM79	Frost Breath	Ice	Special	60	90%	10
TM84	Poison Jab	Poison	Physical	80	100%	20
TM87	Swagger	Normal	Status	—	85%	15
TM88	Sleep Talk	Normal	Status	—	—	10
TM90	Substitute	Normal	Status	—	—	10
TM94	Surf	Water	Special	90	100%	15

Move tutor

Move	Type	Cat.	Power	Acc.	PP
Snore	Normal	Special	50	100%	15
Icy Wind	Ice	Special	55	95%	15
Signal Beam	Bug	Special	75	100%	15
Iron Defense	Steel	Status	—	—	15
Water Pulse	Water	Special	60	100%	20
Liquidation	Water	Physical	85	100%	10

Sun / Moon10 level-up · 27 TM/HM

Level-up

Lv	Move	Type	Cat.	Power	Acc.	PP
1	Supersonic	Normal	Status	—	55%	20
1	Hydro Pump	Water	Special	110	80%	5
1	Aurora Beam	Ice	Special	65	100%	20
1	Withdraw	Water	Status	—	—	40
1	Protect	Normal	Status	—	—	10
1	Toxic Spikes	Poison	Status	—	—	20
1	Shell Smash	Normal	Status	—	—	15
13	Spike Cannon	Normal	Physical	20	100%	15
28	Spikes	Ground	Status	—	—	20
50	Icicle Crash	Ice	Physical	85	90%	10

TM & HM

TM	Move	Type	Cat.	Power	Acc.	PP
TM06	Toxic	Poison	Status	—	90%	10
TM07	Hail	Ice	Status	—	—	10
TM10	Hidden Power	Normal	Special	60	100%	15
TM100	Confide	Normal	Status	—	—	20
TM13	Ice Beam	Ice	Special	90	100%	10
TM14	Blizzard	Ice	Special	110	70%	5
TM15	Hyper Beam	Normal	Special	150	90%	5
TM17	Protect	Normal	Status	—	—	10
TM18	Rain Dance	Water	Status	—	—	5
TM21	Frustration	Normal	Physical	—	100%	20
TM27	Return	Normal	Physical	—	100%	20
TM32	Double Team	Normal	Status	—	—	15
TM41	Torment	Dark	Status	—	100%	15
TM42	Facade	Normal	Physical	70	100%	20
TM44	Rest	Psychic	Status	—	—	5
TM45	Attract	Normal	Status	—	100%	15
TM48	Round	Normal	Special	60	100%	15
TM64	Explosion	Normal	Physical	250	100%	5
TM66	Payback	Dark	Physical	50	100%	10
TM67	Smart Strike	Steel	Physical	70	—	10
TM68	Giga Impact	Normal	Physical	150	90%	5
TM79	Frost Breath	Ice	Special	60	90%	10
TM84	Poison Jab	Poison	Physical	80	100%	20
TM87	Swagger	Normal	Status	—	85%	15
TM88	Sleep Talk	Normal	Status	—	—	10
TM90	Substitute	Normal	Status	—	—	10
TM94	Surf	Water	Special	90	100%	15

Omega Ruby / Alpha Sapphire10 level-up · 28 TM/HM · 5 tutor

Level-up

Lv	Move	Type	Cat.	Power	Acc.	PP
1	Supersonic	Normal	Status	—	55%	20
1	Hydro Pump	Water	Special	110	80%	5
1	Aurora Beam	Ice	Special	65	100%	20
1	Withdraw	Water	Status	—	—	40
1	Protect	Normal	Status	—	—	10
1	Toxic Spikes	Poison	Status	—	—	20
1	Shell Smash	Normal	Status	—	—	15
13	Spike Cannon	Normal	Physical	20	100%	15
28	Spikes	Ground	Status	—	—	20
50	Icicle Crash	Ice	Physical	85	90%	10

TM & HM

TM	Move	Type	Cat.	Power	Acc.	PP
TM06	Toxic	Poison	Status	—	90%	10
TM07	Hail	Ice	Status	—	—	10
TM10	Hidden Power	Normal	Special	60	100%	15
TM100	Confide	Normal	Status	—	—	20
TM13	Ice Beam	Ice	Special	90	100%	10
TM14	Blizzard	Ice	Special	110	70%	5
TM15	Hyper Beam	Normal	Special	150	90%	5
TM17	Protect	Normal	Status	—	—	10
TM18	Rain Dance	Water	Status	—	—	5
TM21	Frustration	Normal	Physical	—	100%	20
TM27	Return	Normal	Physical	—	100%	20
TM32	Double Team	Normal	Status	—	—	15
TM41	Torment	Dark	Status	—	100%	15
TM42	Facade	Normal	Physical	70	100%	20
TM44	Rest	Psychic	Status	—	—	5
TM45	Attract	Normal	Status	—	100%	15
TM48	Round	Normal	Special	60	100%	15
TM64	Explosion	Normal	Physical	250	100%	5
TM66	Payback	Dark	Physical	50	100%	10
TM68	Giga Impact	Normal	Physical	150	90%	5
TM79	Frost Breath	Ice	Special	60	90%	10
TM84	Poison Jab	Poison	Physical	80	100%	20
TM87	Swagger	Normal	Status	—	85%	15
TM88	Sleep Talk	Normal	Status	—	—	10
TM90	Substitute	Normal	Status	—	—	10
TM94	Secret Power	Normal	Physical	70	100%	20
HM03	Surf	Water	Special	90	100%	15
HM07	Dive	Water	Physical	80	100%	10

Move tutor

Move	Type	Cat.	Power	Acc.	PP
Snore	Normal	Special	50	100%	15
Icy Wind	Ice	Special	55	95%	15
Signal Beam	Bug	Special	75	100%	15
Iron Defense	Steel	Status	—	—	15
Water Pulse	Water	Special	60	100%	20

X / Y10 level-up · 26 TM/HM

Level-up

Lv	Move	Type	Cat.	Power	Acc.	PP
1	Supersonic	Normal	Status	—	55%	20
1	Hydro Pump	Water	Special	110	80%	5
1	Aurora Beam	Ice	Special	65	100%	20
1	Withdraw	Water	Status	—	—	40
1	Protect	Normal	Status	—	—	10
1	Toxic Spikes	Poison	Status	—	—	20
1	Shell Smash	Normal	Status	—	—	15
13	Spike Cannon	Normal	Physical	20	100%	15
28	Spikes	Ground	Status	—	—	20
50	Icicle Crash	Ice	Physical	85	90%	10

TM & HM

TM	Move	Type	Cat.	Power	Acc.	PP
TM06	Toxic	Poison	Status	—	90%	10
TM07	Hail	Ice	Status	—	—	10
TM10	Hidden Power	Normal	Special	60	100%	15
TM100	Confide	Normal	Status	—	—	20
TM13	Ice Beam	Ice	Special	90	100%	10
TM14	Blizzard	Ice	Special	110	70%	5
TM15	Hyper Beam	Normal	Special	150	90%	5
TM17	Protect	Normal	Status	—	—	10
TM18	Rain Dance	Water	Status	—	—	5
TM21	Frustration	Normal	Physical	—	100%	20
TM27	Return	Normal	Physical	—	100%	20
TM32	Double Team	Normal	Status	—	—	15
TM41	Torment	Dark	Status	—	100%	15
TM42	Facade	Normal	Physical	70	100%	20
TM44	Rest	Psychic	Status	—	—	5
TM45	Attract	Normal	Status	—	100%	15
TM48	Round	Normal	Special	60	100%	15
TM64	Explosion	Normal	Physical	250	100%	5
TM66	Payback	Dark	Physical	50	100%	10
TM68	Giga Impact	Normal	Physical	150	90%	5
TM79	Frost Breath	Ice	Special	60	90%	10
TM84	Poison Jab	Poison	Physical	80	100%	20
TM87	Swagger	Normal	Status	—	85%	15
TM88	Sleep Talk	Normal	Status	—	—	10
TM90	Substitute	Normal	Status	—	—	10
HM03	Surf	Water	Special	90	100%	15

Black 2 / White 28 level-up · 25 TM/HM · 5 tutor

Level-up

Lv	Move	Type	Cat.	Power	Acc.	PP
1	Supersonic	Normal	Status	—	55%	20
1	Aurora Beam	Ice	Special	65	100%	20
1	Withdraw	Water	Status	—	—	40
1	Protect	Normal	Status	—	—	10
1	Toxic Spikes	Poison	Status	—	—	20
13	Spike Cannon	Normal	Physical	20	100%	15
28	Spikes	Ground	Status	—	—	20
52	Icicle Crash	Ice	Physical	85	90%	10

TM & HM

TM	Move	Type	Cat.	Power	Acc.	PP
TM06	Toxic	Poison	Status	—	90%	10
TM07	Hail	Ice	Status	—	—	10
TM10	Hidden Power	Normal	Special	60	100%	15
TM13	Ice Beam	Ice	Special	90	100%	10
TM14	Blizzard	Ice	Special	110	70%	5
TM15	Hyper Beam	Normal	Special	150	90%	5
TM17	Protect	Normal	Status	—	—	10
TM18	Rain Dance	Water	Status	—	—	5
TM21	Frustration	Normal	Physical	—	100%	20
TM27	Return	Normal	Physical	—	100%	20
TM32	Double Team	Normal	Status	—	—	15
TM41	Torment	Dark	Status	—	100%	15
TM42	Facade	Normal	Physical	70	100%	20
TM44	Rest	Psychic	Status	—	—	5
TM45	Attract	Normal	Status	—	100%	15
TM48	Round	Normal	Special	60	100%	15
TM64	Explosion	Normal	Physical	250	100%	5
TM66	Payback	Dark	Physical	50	100%	10
TM68	Giga Impact	Normal	Physical	150	90%	5
TM79	Frost Breath	Ice	Special	60	90%	10
TM84	Poison Jab	Poison	Physical	80	100%	20
TM87	Swagger	Normal	Status	—	85%	15
TM90	Substitute	Normal	Status	—	—	10
HM03	Surf	Water	Special	90	100%	15
HM06	Dive	Water	Physical	80	100%	10

Move tutor

Move	Type	Cat.	Power	Acc.	PP
Snore	Normal	Special	50	100%	15
Icy Wind	Ice	Special	55	95%	15
Sleep Talk	Normal	Status	—	—	10
Signal Beam	Bug	Special	75	100%	15
Iron Defense	Steel	Status	—	—	15

Black / White8 level-up · 25 TM/HM

Level-up

Lv	Move	Type	Cat.	Power	Acc.	PP
1	Supersonic	Normal	Status	—	55%	20
1	Aurora Beam	Ice	Special	65	100%	20
1	Withdraw	Water	Status	—	—	40
1	Protect	Normal	Status	—	—	10
1	Toxic Spikes	Poison	Status	—	—	20
13	Spike Cannon	Normal	Physical	20	100%	15
28	Spikes	Ground	Status	—	—	20
52	Icicle Crash	Ice	Physical	85	90%	10

TM & HM

TM	Move	Type	Cat.	Power	Acc.	PP
TM06	Toxic	Poison	Status	—	90%	10
TM07	Hail	Ice	Status	—	—	10
TM10	Hidden Power	Normal	Special	60	100%	15
TM13	Ice Beam	Ice	Special	90	100%	10
TM14	Blizzard	Ice	Special	110	70%	5
TM15	Hyper Beam	Normal	Special	150	90%	5
TM17	Protect	Normal	Status	—	—	10
TM18	Rain Dance	Water	Status	—	—	5
TM21	Frustration	Normal	Physical	—	100%	20
TM27	Return	Normal	Physical	—	100%	20
TM32	Double Team	Normal	Status	—	—	15
TM41	Torment	Dark	Status	—	100%	15
TM42	Facade	Normal	Physical	70	100%	20
TM44	Rest	Psychic	Status	—	—	5
TM45	Attract	Normal	Status	—	100%	15
TM48	Round	Normal	Special	60	100%	15
TM64	Explosion	Normal	Physical	250	100%	5
TM66	Payback	Dark	Physical	50	100%	10
TM68	Giga Impact	Normal	Physical	150	90%	5
TM79	Frost Breath	Ice	Special	60	90%	10
TM84	Poison Jab	Poison	Physical	80	100%	20
TM87	Swagger	Normal	Status	—	85%	15
TM90	Substitute	Normal	Status	—	—	10
HM03	Surf	Water	Special	90	100%	15
HM06	Dive	Water	Physical	80	100%	10

HeartGold / SoulSilver7 level-up · 31 TM/HM · 6 tutor

Level-up

Lv	Move	Type	Cat.	Power	Acc.	PP
1	Supersonic	Normal	Status	—	55%	20
1	Aurora Beam	Ice	Special	65	100%	20
1	Withdraw	Water	Status	—	—	40
1	Protect	Normal	Status	—	—	10
1	Toxic Spikes	Poison	Status	—	—	20
28	Spikes	Ground	Status	—	—	20
40	Spike Cannon	Normal	Physical	20	100%	15

TM & HM

TM	Move	Type	Cat.	Power	Acc.	PP
TM03	Water Pulse	Water	Special	60	100%	20
TM06	Toxic	Poison	Status	—	90%	10
TM07	Hail	Ice	Status	—	—	10
TM10	Hidden Power	Normal	Special	60	100%	15
TM13	Ice Beam	Ice	Special	90	100%	10
TM14	Blizzard	Ice	Special	110	70%	5
TM15	Hyper Beam	Normal	Special	150	90%	5
TM17	Protect	Normal	Status	—	—	10
TM18	Rain Dance	Water	Status	—	—	5
TM21	Frustration	Normal	Physical	—	100%	20
TM27	Return	Normal	Physical	—	100%	20
TM32	Double Team	Normal	Status	—	—	15
TM41	Torment	Dark	Status	—	100%	15
TM42	Facade	Normal	Physical	70	100%	20
TM43	Secret Power	Normal	Physical	70	100%	20
TM44	Rest	Psychic	Status	—	—	5
TM45	Attract	Normal	Status	—	100%	15
TM55	Brine	Water	Special	65	100%	10
TM58	Endure	Normal	Status	—	—	10
TM64	Explosion	Normal	Physical	250	100%	5
TM66	Payback	Dark	Physical	50	100%	10
TM68	Giga Impact	Normal	Physical	150	90%	5
TM72	Avalanche	Ice	Physical	60	100%	10
TM78	Captivate	Normal	Status	—	100%	20
TM82	Sleep Talk	Normal	Status	—	—	10
TM83	Natural Gift	Normal	Physical	—	100%	15
TM84	Poison Jab	Poison	Physical	80	100%	20
TM87	Swagger	Normal	Status	—	85%	15
TM90	Substitute	Normal	Status	—	—	10
HM03	Surf	Water	Special	90	100%	15
HM05	Whirlpool	Water	Special	35	85%	15

Move tutor

Move	Type	Cat.	Power	Acc.	PP
Swift	Normal	Special	60	—	20
Snore	Normal	Special	50	100%	15
Icy Wind	Ice	Special	55	95%	15
Dive	Water	Physical	80	100%	10
Signal Beam	Bug	Special	75	100%	15
Iron Defense	Steel	Status	—	—	15

Platinum7 level-up · 30 TM/HM · 6 tutor

Level-up

Lv	Move	Type	Cat.	Power	Acc.	PP
1	Supersonic	Normal	Status	—	55%	20
1	Aurora Beam	Ice	Special	65	100%	20
1	Withdraw	Water	Status	—	—	40
1	Protect	Normal	Status	—	—	10
1	Toxic Spikes	Poison	Status	—	—	20
28	Spikes	Ground	Status	—	—	20
40	Spike Cannon	Normal	Physical	20	100%	15

TM & HM

TM	Move	Type	Cat.	Power	Acc.	PP
TM03	Water Pulse	Water	Special	60	100%	20
TM06	Toxic	Poison	Status	—	90%	10
TM07	Hail	Ice	Status	—	—	10
TM10	Hidden Power	Normal	Special	60	100%	15
TM13	Ice Beam	Ice	Special	90	100%	10
TM14	Blizzard	Ice	Special	110	70%	5
TM15	Hyper Beam	Normal	Special	150	90%	5
TM17	Protect	Normal	Status	—	—	10
TM18	Rain Dance	Water	Status	—	—	5
TM21	Frustration	Normal	Physical	—	100%	20
TM27	Return	Normal	Physical	—	100%	20
TM32	Double Team	Normal	Status	—	—	15
TM41	Torment	Dark	Status	—	100%	15
TM42	Facade	Normal	Physical	70	100%	20
TM43	Secret Power	Normal	Physical	70	100%	20
TM44	Rest	Psychic	Status	—	—	5
TM45	Attract	Normal	Status	—	100%	15
TM55	Brine	Water	Special	65	100%	10
TM58	Endure	Normal	Status	—	—	10
TM64	Explosion	Normal	Physical	250	100%	5
TM66	Payback	Dark	Physical	50	100%	10
TM68	Giga Impact	Normal	Physical	150	90%	5
TM72	Avalanche	Ice	Physical	60	100%	10
TM78	Captivate	Normal	Status	—	100%	20
TM82	Sleep Talk	Normal	Status	—	—	10
TM83	Natural Gift	Normal	Physical	—	100%	15
TM84	Poison Jab	Poison	Physical	80	100%	20
TM87	Swagger	Normal	Status	—	85%	15
TM90	Substitute	Normal	Status	—	—	10
HM03	Surf	Water	Special	90	100%	15

Move tutor

Move	Type	Cat.	Power	Acc.	PP
Swift	Normal	Special	60	—	20
Snore	Normal	Special	50	100%	15
Icy Wind	Ice	Special	55	95%	15
Dive	Water	Physical	80	100%	10
Signal Beam	Bug	Special	75	100%	15
Iron Defense	Steel	Status	—	—	15

Diamond / Pearl7 level-up · 30 TM/HM

Level-up

Lv	Move	Type	Cat.	Power	Acc.	PP
1	Supersonic	Normal	Status	—	55%	20
1	Aurora Beam	Ice	Special	65	100%	20
1	Withdraw	Water	Status	—	—	40
1	Protect	Normal	Status	—	—	10
1	Toxic Spikes	Poison	Status	—	—	20
28	Spikes	Ground	Status	—	—	20
40	Spike Cannon	Normal	Physical	20	100%	15

TM & HM

TM	Move	Type	Cat.	Power	Acc.	PP
TM03	Water Pulse	Water	Special	60	100%	20
TM06	Toxic	Poison	Status	—	90%	10
TM07	Hail	Ice	Status	—	—	10
TM10	Hidden Power	Normal	Special	60	100%	15
TM13	Ice Beam	Ice	Special	90	100%	10
TM14	Blizzard	Ice	Special	110	70%	5
TM15	Hyper Beam	Normal	Special	150	90%	5
TM17	Protect	Normal	Status	—	—	10
TM18	Rain Dance	Water	Status	—	—	5
TM21	Frustration	Normal	Physical	—	100%	20
TM27	Return	Normal	Physical	—	100%	20
TM32	Double Team	Normal	Status	—	—	15
TM41	Torment	Dark	Status	—	100%	15
TM42	Facade	Normal	Physical	70	100%	20
TM43	Secret Power	Normal	Physical	70	100%	20
TM44	Rest	Psychic	Status	—	—	5
TM45	Attract	Normal	Status	—	100%	15
TM55	Brine	Water	Special	65	100%	10
TM58	Endure	Normal	Status	—	—	10
TM64	Explosion	Normal	Physical	250	100%	5
TM66	Payback	Dark	Physical	50	100%	10
TM68	Giga Impact	Normal	Physical	150	90%	5
TM72	Avalanche	Ice	Physical	60	100%	10
TM78	Captivate	Normal	Status	—	100%	20
TM82	Sleep Talk	Normal	Status	—	—	10
TM83	Natural Gift	Normal	Physical	—	100%	15
TM84	Poison Jab	Poison	Physical	80	100%	20
TM87	Swagger	Normal	Status	—	85%	15
TM90	Substitute	Normal	Status	—	—	10
HM03	Surf	Water	Special	90	100%	15

FireRed / LeafGreen6 level-up · 19 TM/HM · 4 tutor

Level-up

Lv	Move	Type	Cat.	Power	Acc.	PP
1	Supersonic	Normal	Status	—	55%	20
1	Aurora Beam	Ice	Special	65	100%	20
1	Withdraw	Water	Status	—	—	40
1	Protect	Normal	Status	—	—	10
36	Spikes	Ground	Status	—	—	20
43	Spike Cannon	Normal	Physical	20	100%	15

TM & HM

TM	Move	Type	Cat.	Power	Acc.	PP
TM03	Water Pulse	Water	Special	60	100%	20
TM06	Toxic	Poison	Status	—	90%	10
TM07	Hail	Ice	Status	—	—	10
TM10	Hidden Power	Normal	Special	60	100%	15
TM13	Ice Beam	Ice	Special	90	100%	10
TM14	Blizzard	Ice	Special	110	70%	5
TM15	Hyper Beam	Normal	Special	150	90%	5
TM17	Protect	Normal	Status	—	—	10
TM18	Rain Dance	Water	Status	—	—	5
TM21	Frustration	Normal	Physical	—	100%	20
TM27	Return	Normal	Physical	—	100%	20
TM32	Double Team	Normal	Status	—	—	15
TM41	Torment	Dark	Status	—	100%	15
TM42	Facade	Normal	Physical	70	100%	20
TM43	Secret Power	Normal	Physical	70	100%	20
TM44	Rest	Psychic	Status	—	—	5
TM45	Attract	Normal	Status	—	100%	15
HM03	Surf	Water	Special	90	100%	15
HM08	Dive	Water	Physical	80	100%	10

Move tutor

Move	Type	Cat.	Power	Acc.	PP
Double-Edge	Normal	Physical	120	100%	15
Mimic	Normal	Status	—	—	10
Explosion	Normal	Physical	250	100%	5
Substitute	Normal	Status	—	—	10

Emerald6 level-up · 19 TM/HM · 10 tutor

Level-up

Lv	Move	Type	Cat.	Power	Acc.	PP
1	Supersonic	Normal	Status	—	55%	20
1	Aurora Beam	Ice	Special	65	100%	20
1	Withdraw	Water	Status	—	—	40
1	Protect	Normal	Status	—	—	10
33	Spikes	Ground	Status	—	—	20
41	Spike Cannon	Normal	Physical	20	100%	15

TM & HM

TM	Move	Type	Cat.	Power	Acc.	PP
TM03	Water Pulse	Water	Special	60	100%	20
TM06	Toxic	Poison	Status	—	90%	10
TM07	Hail	Ice	Status	—	—	10
TM10	Hidden Power	Normal	Special	60	100%	15
TM13	Ice Beam	Ice	Special	90	100%	10
TM14	Blizzard	Ice	Special	110	70%	5
TM15	Hyper Beam	Normal	Special	150	90%	5
TM17	Protect	Normal	Status	—	—	10
TM18	Rain Dance	Water	Status	—	—	5
TM21	Frustration	Normal	Physical	—	100%	20
TM27	Return	Normal	Physical	—	100%	20
TM32	Double Team	Normal	Status	—	—	15
TM41	Torment	Dark	Status	—	100%	15
TM42	Facade	Normal	Physical	70	100%	20
TM43	Secret Power	Normal	Physical	70	100%	20
TM44	Rest	Psychic	Status	—	—	5
TM45	Attract	Normal	Status	—	100%	15
HM03	Surf	Water	Special	90	100%	15
HM08	Dive	Water	Physical	80	100%	10

Move tutor

Move	Type	Cat.	Power	Acc.	PP
Double-Edge	Normal	Physical	120	100%	15
Mimic	Normal	Status	—	—	10
Swift	Normal	Special	60	—	20
Explosion	Normal	Physical	250	100%	5
Substitute	Normal	Status	—	—	10
Snore	Normal	Special	50	100%	15
Icy Wind	Ice	Special	55	95%	15
Endure	Normal	Status	—	—	10
Swagger	Normal	Status	—	85%	15
Sleep Talk	Normal	Status	—	—	10

Ruby / Sapphire6 level-up · 19 TM/HM

Level-up

Lv	Move	Type	Cat.	Power	Acc.	PP
1	Supersonic	Normal	Status	—	55%	20
1	Aurora Beam	Ice	Special	65	100%	20
1	Withdraw	Water	Status	—	—	40
1	Protect	Normal	Status	—	—	10
33	Spikes	Ground	Status	—	—	20
41	Spike Cannon	Normal	Physical	20	100%	15

TM & HM

TM	Move	Type	Cat.	Power	Acc.	PP
TM03	Water Pulse	Water	Special	60	100%	20
TM06	Toxic	Poison	Status	—	90%	10
TM07	Hail	Ice	Status	—	—	10
TM10	Hidden Power	Normal	Special	60	100%	15
TM13	Ice Beam	Ice	Special	90	100%	10
TM14	Blizzard	Ice	Special	110	70%	5
TM15	Hyper Beam	Normal	Special	150	90%	5
TM17	Protect	Normal	Status	—	—	10
TM18	Rain Dance	Water	Status	—	—	5
TM21	Frustration	Normal	Physical	—	100%	20
TM27	Return	Normal	Physical	—	100%	20
TM32	Double Team	Normal	Status	—	—	15
TM41	Torment	Dark	Status	—	100%	15
TM42	Facade	Normal	Physical	70	100%	20
TM43	Secret Power	Normal	Physical	70	100%	20
TM44	Rest	Psychic	Status	—	—	5
TM45	Attract	Normal	Status	—	100%	15
HM03	Surf	Water	Special	90	100%	15
HM08	Dive	Water	Physical	80	100%	10

Crystal6 level-up · 20 TM/HM · 1 tutor

Level-up

Lv	Move	Type	Cat.	Power	Acc.	PP
1	Supersonic	Normal	Status	—	55%	20
1	Aurora Beam	Ice	Special	65	100%	20
1	Withdraw	Water	Status	—	—	40
1	Protect	Normal	Status	—	—	10
33	Spikes	Ground	Status	—	—	20
41	Spike Cannon	Normal	Physical	20	100%	15

TM & HM

TM	Move	Type	Cat.	Power	Acc.	PP
TM03	Curse	Ghost	Status	—	—	10
TM06	Toxic	Poison	Status	—	90%	10
TM10	Hidden Power	Normal	Special	60	100%	15
TM13	Snore	Normal	Special	50	100%	15
TM14	Blizzard	Ice	Special	110	70%	5
TM15	Hyper Beam	Normal	Special	150	90%	5
TM16	Icy Wind	Ice	Special	55	95%	15
TM17	Protect	Normal	Status	—	—	10
TM18	Rain Dance	Water	Status	—	—	5
TM20	Endure	Normal	Status	—	—	10
TM21	Frustration	Normal	Physical	—	100%	20
TM27	Return	Normal	Physical	—	100%	20
TM32	Double Team	Normal	Status	—	—	15
TM34	Swagger	Normal	Status	—	85%	15
TM35	Sleep Talk	Normal	Status	—	—	10
TM39	Swift	Normal	Special	60	—	20
TM44	Rest	Psychic	Status	—	—	5
TM45	Attract	Normal	Status	—	100%	15
HM03	Surf	Water	Special	90	100%	15
HM06	Whirlpool	Water	Special	35	85%	15

Move tutor

	Move	Type	Cat.	Power	Acc.	PP
	Ice Beam	Ice	Special	90	100%	10

Gold / Silver5 level-up · 20 TM/HM

Level-up

Lv	Move	Type	Cat.	Power	Acc.	PP
1	Supersonic	Normal	Status	—	55%	20
1	Aurora Beam	Ice	Special	65	100%	20
1	Withdraw	Water	Status	—	—	40
1	Protect	Normal	Status	—	—	10
41	Spike Cannon	Normal	Physical	20	100%	15

TM & HM

TM	Move	Type	Cat.	Power	Acc.	PP
TM03	Curse	Ghost	Status	—	—	10
TM06	Toxic	Poison	Status	—	90%	10
TM10	Hidden Power	Normal	Special	60	100%	15
TM13	Snore	Normal	Special	50	100%	15
TM14	Blizzard	Ice	Special	110	70%	5
TM15	Hyper Beam	Normal	Special	150	90%	5
TM16	Icy Wind	Ice	Special	55	95%	15
TM17	Protect	Normal	Status	—	—	10
TM18	Rain Dance	Water	Status	—	—	5
TM20	Endure	Normal	Status	—	—	10
TM21	Frustration	Normal	Physical	—	100%	20
TM27	Return	Normal	Physical	—	100%	20
TM32	Double Team	Normal	Status	—	—	15
TM34	Swagger	Normal	Status	—	85%	15
TM35	Sleep Talk	Normal	Status	—	—	10
TM39	Swift	Normal	Special	60	—	20
TM44	Rest	Psychic	Status	—	—	5
TM45	Attract	Normal	Status	—	100%	15
HM03	Surf	Water	Special	90	100%	15
HM06	Whirlpool	Water	Special	35	85%	15

Yellow5 level-up · 21 TM/HM

Level-up

Lv	Move	Type	Cat.	Power	Acc.	PP
1	Supersonic	Normal	Status	—	55%	20
1	Aurora Beam	Ice	Special	65	100%	20
1	Withdraw	Water	Status	—	—	40
1	Clamp	Water	Physical	35	85%	15
50	Spike Cannon	Normal	Physical	20	100%	15

TM & HM

TM	Move	Type	Cat.	Power	Acc.	PP
TM06	Toxic	Poison	Status	—	90%	10
TM09	Take Down	Normal	Physical	90	85%	20
TM10	Double-Edge	Normal	Physical	120	100%	15
TM11	Bubble Beam	Water	Special	65	100%	20
TM12	Water Gun	Water	Special	40	100%	25
TM13	Ice Beam	Ice	Special	90	100%	10
TM14	Blizzard	Ice	Special	110	70%	5
TM15	Hyper Beam	Normal	Special	150	90%	5
TM20	Rage	Normal	Physical	20	100%	20
TM30	Teleport	Psychic	Status	—	—	20
TM31	Mimic	Normal	Status	—	—	10
TM32	Double Team	Normal	Status	—	—	15
TM33	Reflect	Psychic	Status	—	—	20
TM34	Bide	Normal	Physical	—	—	10
TM36	Selfdestruct	Normal	Physical	200	100%	5
TM39	Swift	Normal	Special	60	—	20
TM44	Rest	Psychic	Status	—	—	5
TM47	Explosion	Normal	Physical	250	100%	5
TM49	Tri Attack	Normal	Special	80	100%	10
TM50	Substitute	Normal	Status	—	—	10
HM03	Surf	Water	Special	90	100%	15

Red / Blue5 level-up · 21 TM/HM

Level-up

Lv	Move	Type	Cat.	Power	Acc.	PP
1	Supersonic	Normal	Status	—	55%	20
1	Aurora Beam	Ice	Special	65	100%	20
1	Withdraw	Water	Status	—	—	40
1	Clamp	Water	Physical	35	85%	15
50	Spike Cannon	Normal	Physical	20	100%	15

TM & HM

TM	Move	Type	Cat.	Power	Acc.	PP
TM06	Toxic	Poison	Status	—	90%	10
TM09	Take Down	Normal	Physical	90	85%	20
TM10	Double-Edge	Normal	Physical	120	100%	15
TM11	Bubble Beam	Water	Special	65	100%	20
TM12	Water Gun	Water	Special	40	100%	25
TM13	Ice Beam	Ice	Special	90	100%	10
TM14	Blizzard	Ice	Special	110	70%	5
TM15	Hyper Beam	Normal	Special	150	90%	5
TM20	Rage	Normal	Physical	20	100%	20
TM30	Teleport	Psychic	Status	—	—	20
TM31	Mimic	Normal	Status	—	—	10
TM32	Double Team	Normal	Status	—	—	15
TM33	Reflect	Psychic	Status	—	—	20
TM34	Bide	Normal	Physical	—	—	10
TM36	Selfdestruct	Normal	Physical	200	100%	5
TM39	Swift	Normal	Special	60	—	20
TM44	Rest	Psychic	Status	—	—	5
TM47	Explosion	Normal	Physical	250	100%	5
TM49	Tri Attack	Normal	Special	80	100%	10
TM50	Substitute	Normal	Status	—	—	10
HM03	Surf	Water	Special	90	100%	15

Where to find it in the official games

Every area in the 16 official games on this site that has it, from each game's own encounter tables.

In the wild

Game	Area	Method	Levels	Rate
Black / White	Route 13 rare	Super Rod rippling water	45-70	5%
Black / White	Undella Bay rare	Super Rod rippling water	45-70	5%
Black / White	Undella Town rare	Super Rod rippling water	45-70	5%
Black 2 / White 2	Humilau City rare	Super Rod rippling water	50-70	5%
Black 2 / White 2	Route 13 rare	Super Rod rippling water	50-70	5%
Black 2 / White 2	Seaside Cave rare	Super Rod rippling water	50-70	5%
Black 2 / White 2	Undella Town rare	Super Rod rippling water	50-70	5%
X / Y	Friend Safari	Grass	30	25%
X / Y	Route 8 rare	Super Rod	35	5%

Where to find it in the ROM hacks

38 guides on this site put it somewhere you can catch it. Areas link to that guide's own route page, with its own rates and levels.

Guide	Where
Unbound	Frost Mountain 1FSuper Rod · Lv 45-50 · 1%rare Frost Mountain 2FSuper Rod · Lv 45-50 · 1%rare Icicle Cave B1FSuper Rod · Lv 45-50 · 1%rare and 6 more areas
Pokémon Soulgold	Ruins of Alph OutsideSuper Rod · Lv 40 · 1%rare Union Cave B2FSuper Rod · Lv 40 · 15% Route 28Super Rod · Lv 40-50 · 19% and 1 more area
Pokémon Heart & Soul	Ula'ula IsleSuper Rod · Lv 43-45 · 55%
Infinite Fusion	Seafoam Islands B4Surf (Classic) · Lv 38 · 2%rare Seafoam Islands B4Surf (Remix) · Lv 38 · 2%rare Mt. Silver (area 4)Surf (Remix) · Lv 58-62 · 20% and 4 more areas
Celia's Stupid Romhack	Cave Of Origin 1FGrass · Lv 30 · 50% Great Bay Sky Pillar OutsideRock Smash · Lv 5 · 100% Route 21 NorthRock Smash · Lv 5 · 100% and 1 more area
Lazarus	Pollen RoadSuper Rod · Lv 30-40 · 15% Davosi StraitsSuper Rod · Lv 30-40 · 15%
Pokémon Odyssey	Sea of Galazeah (Naval Exploration)Naval exploration — after the Second Stratum · Lv 30 Sea of Galazeah (Naval Exploration)Naval exploration — after the Third Stratum · Lv 40 Sea of Galazeah (Naval Exploration)Naval exploration — after the Fourth Stratum · Lv 50
Blaze Black 2 Redux & Volt White 2 Redux	Undella TownSuper Rod Ripple · Lv 40-46 · 10% Seaside Cave - Upper FloorSuper Rod · Lv 40-50 · 5%rare Route 21Surf Ripple · Lv 50-55 · 10% and 5 more areas
Pokémon Phoenix Red	Route 1Super Rod · Lv 30-35 · 80% Cerulean CitySuper Rod · Lv 30-35 · 5% Seafoam Islands 1FGrass · Lv 36-40 · 20% and 1 more area
Recordkeepers	Minibosses — every affinityMiniboss (three per area, drawn from the pool) · Lv 90–99, scales
Elite Redux	Dewford TownSuper Rod · Lv — · 5%rare Route 124Super Rod · Lv — · 30% Route 127Super Rod · Lv — · 40%
Pokémon Emerald Kaizo	Route 107Super Rod · Lv 65 · 15% Route 125Surf · Lv 64 · 5%rare Route 125Super Rod · Lv 64 · 40% and 15 more areas
Inclement Emerald	Dewford TownSuper Rod · Lv Scales · 5%rare
Renegade Platinum	Valley WindworksSuper Rod · Lv 50 · 30% Route 205 ~ SouthSuper Rod · Lv 50 · 30%
Pokémon Ambrosia	Cape StormOverworld (aggressive) · Lv 61 Cerulean CaveSuper Rod · Lv 50 · 20% Cherrygrove CitySuper Rod · Lv 50 · 20% and 34 more areas
Pokemon Modern Emerald	Victory RoadSurf · Lv 35-40 · 9%
Pokémon Crippling Medical Debt Edition	Mauville CitySuper Rod · Lv 35-42 · 40% Underwater Route 118Surf · Lv 60-64 · 4%rare Victory Road 1FGood Rod · Lv 30-50 · 20%
Pokémon Emerald Ex	Route 103Super Rod · Lv ? · 5%rare Frozen HeightsSuper Rod · Lv ? · 5%rare Shoal Cave Low Tide Stairs RoomGrass · Lv ? · 5%rare and 1 more area
Gaia	Aerous CityFishing · Lv — · Super Rod 20% Sabulo CrossFishing · Lv — · Super Rod 20% Precimos DepthsFishing · Lv — · Super Rod 30% and 2 more areas
Pokémon Emerald Imperium	Route 115Super Rod · Lv 35-45 · 20% Route 125Surf · Lv 15-25 · 5%rare Route 125Super Rod · Lv 35-45 · 20%
Pokémon Platinum Kaizo	Lake VeritySuper Rod · Lv ? · 40% Mt. Coronet SouthSuper Rod · Lv ? · 40% Victory Road B1FOld Rod · Lv ? · 30% and 3 more areas
Pokémon Exceeded	Dewford TownSuper Rod · Lv 30-35 · 40% Route 104Super Rod · Lv 30-45 · 40% Route 105Super Rod · Lv 30-45 · 40% and 5 more areas
Pokémon Emerald Squared	Underwater Route 126Water · Lv 40-50 · 11.1% Route 106Fishing · Lv 26-40 · 10% Route 109Water · Lv 20-30 · 11.1% and 2 more areas
Pokémon Tourmaline	Route 76Super Rod · Lv — · 5%rare Route 74Super Rod · Lv — · 5%rare Route 73Super Rod · Lv — · 5%rare and 2 more areas
Sacred Gold & Storm Silver	Whirl Islands (B3F)Meridian Sound · Lv —
Blaze Black 2 & Volt White 2	Route 6 - WinterSuper Rod Ripple · Lv 30 · 5%rare Undella AreaSuper Rod Ripple — Undella Town · Lv 38-43 · 5%rare Seaside Cave, Top FloorSuper Rod Ripple · Lv 40-50 · 5%rare and 5 more areas
Pokémon Definitive Platinum	Lake AcuitySuper Rod · Lv 40-55 · 20%
Rising Ruby & Sinking Sapphire	Dewford TownSuper Rod · Lv 55 Route 125Super Rod · Lv 55 Shoal Cave 1FSuper Rod · Lv 55
Blaze Black & Volt White	Wellspring Cave — B1FSuper Rod Ripple · Lv — · 100% Route 13Super Rod Ripple · Lv — · 5%rare Undella TownSuper Rod Ripple · Lv — · 5%rare and 1 more area
Fire Red Omega	Route 23Super Rod · Lv — Bond BridgeGood Rod · Lv — Bond BridgeSuper Rod · Lv — and 1 more area
Pokémon FireRed Deluxe	Route 24Super Rod · Lv ? · 35% Route 25Super Rod · Lv ? · 5% Seafoam Islands 4Super Rod · Lv ? · 15% and 4 more areas
Pokémon Saiph 2	Risreg FallsFishing · Lv 30-45 · 40%
Pokémon Sour Crystal	Players House 2FGift · Lv 50
Pokémon Black Pearl Emerald	Abandoned ShipSurf · Lv 47-53 · 60% Route 126Surf · Lv 56-62 · 1%rare Shoal CaveGrass · Lv 47-53 · 4%rare and 3 more areas
Pokémon Project Nova	Safari ZoneSurfing (Seafloor Cave) · Lv 30 · 40% Safari ZoneSuper Rod (Seafloor Cave) · Lv 55 · 20% Route 12Super Rod · Lv 55 · 40% and 1 more area
Pokémon Mirror Gold	Cianwood CitySurf · Lv 28-30 · 60% Route 32Super Rod · Lv 55-65 · 30% Route 9Good Rod · Lv 60-62 · 5%rare and 2 more areas
Pokémon Timeless Diamond & Spaceless Pearl	Route 205 (Southern segment)Super Rod · Lv 50-60 · 5% Valley WindworksSuper Rod · Lv 50-60 · 5% Fuego IronworksSuper Rod · Lv 50-60 · 5%
Pokémon Emerald Seaglass	Route 122Super Rod · Lv 25-45 · 20%
Emerald Rogue	not in the wild in this guide's tables — evolve, trade or battle it
Pokémon R.O.W.E	not in the wild in this guide's tables — evolve, trade or battle it
Sword and Shield Ultimate Plus	not in the wild in this guide's tables — evolve, trade or battle it
Radical Red	not in the wild in this guide's tables — evolve, trade or battle it
Pokémon GS Chronicles	not in the wild in this guide's tables — evolve, trade or battle it
Pokémon FireRed & LeafGreen+	not in the wild in this guide's tables — evolve, trade or battle it
Pokémon Aesthetic Red	not in the wild in this guide's tables — evolve, trade or battle it
Blinding White Plus	not in the wild in this guide's tables — evolve, trade or battle it
Pokémon Valiant	not in the wild in this guide's tables — evolve, trade or battle it
Pokémon Classic	not in the wild in this guide's tables — evolve, trade or battle it
Pokémon: Wishes of Tomorrow	not in the wild in this guide's tables — evolve, trade or battle it
Pokémon WaveBlue	not in the wild in this guide's tables — evolve, trade or battle it
Pokémon Hoenn's Last Wish	not in the wild in this guide's tables — evolve, trade or battle it
Low Budget Crystal	not in the wild in this guide's tables — evolve, trade or battle it
Pokémon FireRed Reignited & LeafGreen Regrown	not in the wild in this guide's tables — evolve, trade or battle it
Pokémon Polished Crystal	not in the wild in this guide's tables — evolve, trade or battle it
Pokémon SoothingSilver	not in the wild in this guide's tables — evolve, trade or battle it
Pokémon FireRed: Rocket Edition	not in the wild in this guide's tables — evolve, trade or battle it
Pokemon Kanto Expansion Pak	not in the wild in this guide's tables — evolve, trade or battle it
Pokémon Peridot Version	not in the wild in this guide's tables — evolve, trade or battle it
HeartGold Generations	not in the wild in this guide's tables — evolve, trade or battle it
Pokémon Overcomplicated	not in the wild in this guide's tables — evolve, trade or battle it
Pokémon Emerald Rule-ette	not in the wild in this guide's tables — evolve, trade or battle it
Pokémon Crystal Legacy	not in the wild in this guide's tables — evolve, trade or battle it

Compare official Cloyster with the ROM hacks →

In the 62 guides that include it

Changed in 30 of 62 guides: retyped in 3, stats in 15, abilities in 23, evolution in 2.

Every ROM hack on this site that has Cloyster, and what it did to it. Guides that changed something are first. Click one for that version's full page — locations, moveset and TMs.

Guide		Type	Total	Abilities
Celia's Stupid Romhack Evolves into Krabby at Level 55	Changed	WaterIce	515 -10 -10 Speed	Misty Surge, Misty Surge + Misty Surge, Misty Surge
Sword and Shield Ultimate Plus	Changed	WaterIce	525	Shell Armor, Skill Link − Overcoat
Lazarus Evolves at Water Stone	Changed	WaterIce	530 +5 +5 Sp. Def	Shell Armor, Skill Link, Overcoat
Pokémon Odyssey	Changed	WaterIce	535 +10 +10 Sp. Atk	Swift Swim, Skill Link + Swift Swim − Shell Armor, Overcoat
Pokémon Phoenix Red	Changed	WaterIce	525 +20 HP, +5 Attack, -10 Defense, -25 Sp. Atk, +20 Sp. Def, -10 Speed	Rough Skin, Swift Swim + Rough Skin, Swift Swim − Shell Armor, Skill Link, Overcoat
Recordkeepers	Changed	WaterIce	525	Skill Link − Shell Armor, Overcoat
Pokémon Emerald Kaizo	Changed	WaterIce	550 +25 +25 Sp. Def	Shell Armor − Skill Link, Overcoat
Renegade Platinum	Changed	WaterIce	525	Skill Link, Shell Armor − Overcoat
Pokémon FireRed & LeafGreen+	Changed	WaterIce	525	Shell Armor − Skill Link, Overcoat
Pokémon Aesthetic Red	Changed	WaterIce	525	Ice Scales, Skill Link + Ice Scales − Shell Armor, Overcoat
Pokemon Modern Emerald	Changed	WaterIce	525	Shell Armor
Pokémon Crippling Medical Debt Edition	Changed		0 -525 -50 HP, -95 Attack, -180 Defense, -85 Sp. Atk, -45 Sp. Def, -70 Speed	—
Blinding White Plus	Changed	WaterIce→WaterSteel	530 +5 +35 HP, -50 Defense, +20 Sp. Def	Shell Armor, Skill Link − Overcoat
Pokémon Platinum Kaizo	Changed	WaterIce	555 +30 +30 Sp. Def	Filter, Shell Armor + Filter − Skill Link, Overcoat
Low Budget Crystal	Changed	WaterIce	525	Ice Body + Ice Body − Shell Armor, Skill Link, Overcoat
Pokémon Emerald Squared	Changed	WaterIce	545 +20 +20 HP	Shell Armor, Skill Link, Overcoat
Pokémon FireRed Reignited & LeafGreen Regrown	Changed	WaterIce	525	Shell Armor − Skill Link, Overcoat
Sacred Gold & Storm Silver	Changed	WaterIce	525	Shell Armor, Skill Link − Overcoat
Pokémon SoothingSilver	Changed	WaterIce	525	Shell Armor, Skill Link − Overcoat
Blaze Black & Volt White	Changed	WaterIce	525	Overcoat, Skill Link, Overcoat − Shell Armor
Fire Red Omega	Changed	WaterIce	525	Shell Armor, Skill Link − Overcoat
Pokémon FireRed: Rocket Edition	Changed	WaterIce	525 -15 Sp. Atk, +40 Sp. Def, -25 Speed	Shell Armor, Skill Link − Overcoat
Pokemon Kanto Expansion Pak	Changed	WaterIce	565 +40 +40 Sp. Def	—
Pokémon FireRed Deluxe	Changed	WaterIce→WaterSteel	530 +5 +10 HP, -20 Defense, +15 Sp. Def	Shell Armor, Rain Dish + Rain Dish − Skill Link, Overcoat
Pokémon Saiph 2	Changed		0 -525 -50 HP, -95 Attack, -180 Defense, -85 Sp. Atk, -45 Sp. Def, -70 Speed	—
Pokémon Project Nova	Changed	WaterIce	525	Shell Armor − Skill Link, Overcoat
Pokémon Overcomplicated	Changed	WaterIce→WaterIceDark	525	Moody, No Guard, Color Change
Pokémon Mirror Gold	Changed	WaterIce	530 +5 +5 Attack	Skill Link, Overcoat − Shell Armor
Pokémon Timeless Diamond & Spaceless Pearl	Changed	WaterIce	525	Shell Armor, Skill Link − Overcoat
Pokémon Emerald Seaglass	Changed	WaterIce	530 +5 +5 Sp. Def	Shell Armor, Skill Link, Overcoat
Unbound	Unchanged	WaterIce	525	Shell Armor, Skill Link, Overcoat
Emerald Rogue	Unchanged	WaterIce	525	Shell Armor, Skill Link, Overcoat
Pokémon Soulgold	Unchanged	WaterIce	525	Shell Armor, Skill Link, Overcoat
Pokémon Heart & Soul	Unchanged	WaterIce	525	Shell Armor, Skill Link, Overcoat
Infinite Fusion	Unchanged	WaterIce	525	Shell Armor, Skill Link, Overcoat
Pokémon R.O.W.E	Unchanged	WaterIce	525	Shell Armor, Skill Link, Overcoat
Blaze Black 2 Redux & Volt White 2 Redux	Unchanged	WaterIce	525	Shell Armor, Skill Link, Overcoat
Radical Red	Unchanged	WaterIce	525	Shell Armor, Skill Link, Overcoat
Elite Redux	Unchanged	WaterIce	525	Impenetrable, Hydrate, Weak Armor
Pokémon GS Chronicles	Unchanged	WaterIce	525	Shell Armor, Skill Link, Overcoat
Inclement Emerald	Unchanged	WaterIce	525	Shell Armor, Skill Link, Overcoat
Pokémon Ambrosia	Unchanged	WaterIce	525	Can not be KO'd from full HP
Pokémon Emerald Ex	Unchanged	WaterIce	525	—
Pokémon Valiant	Unchanged	WaterIce	525	Shell Armor, Skill Link, Overcoat
Gaia	Unchanged	WaterIce	525	Shell Armor, Skill Link, Overcoat
Pokémon Emerald Imperium	Unchanged	WaterIce	525	Shell Armor, Skill Link, Overcoat
Pokémon Classic	Unchanged	WaterIce	525	Shell Armor, Skill Link, Overcoat
Pokémon: Wishes of Tomorrow	Unchanged	WaterIce	525	Shell Armor, Skill Link, Overcoat
Pokémon Exceeded	Unchanged	WaterIce	525	Skill Link, Hydration, Regenerator
Pokémon WaveBlue	Unchanged	WaterIce	525	Shell Armor, Skill Link, Overcoat
Pokémon Hoenn's Last Wish	Unchanged	WaterIce	525	Shell Armor, Skill Link, Overcoat
Pokémon Tourmaline	Unchanged		525	—
Pokémon Polished Crystal	Unchanged	WaterIce	525	Shell Armor, Skill Link, Overcoat
Blaze Black 2 & Volt White 2	Unchanged	WaterIce	525	Shell Armor, Skill Link, Overcoat
Pokémon Definitive Platinum	Unchanged	WaterIce	525	Shell Armor, Skill Link, Overcoat
Rising Ruby & Sinking Sapphire	Unchanged	WaterIce	525	Shell Armor, Skill Link, Overcoat
Pokémon Peridot Version	Unchanged	WaterIce	525	—
HeartGold Generations	Unchanged	WaterIce	525	Shell Armor, Skill Link, Overcoat
Pokémon Sour Crystal	Unchanged	WaterIce	525	—
Pokémon Black Pearl Emerald	Unchanged	WaterIce	525	Shell Armor, Skill Link, Overcoat
Pokémon Emerald Rule-ette	Unchanged	WaterIce	525	Shell Armor, Skill Link, Overcoat
Pokémon Crystal Legacy	Unchanged	WaterIce	525	—

Pokédex entries

What each game says about it, in the games' own words.

Red / Blue / LeafGreen	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 superi or strength.
Silver / SoulSilver	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 hard er 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.
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.
FireRed / Y	Its shell is extremely hard. It cannot be shattered, even with a bomb. The shell opens only when it is attacking.
Diamond / Pearl / Platinum / Black / White / Black 2 / White 2	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.
X	Cloyster that live in seas with harsh tidal currents grow large, sharp spikes on their shells.
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.

Names in other languages

Japanese	パルシェン
Japanese (Rōmaji)	Parshen
German	Austos
French	Crustabri
Spanish	Cloyster
Italian	Cloyster
Korean	파르셀
Chinese (Simplified)	刺甲贝
Chinese (Traditional)	刺甲貝

Official data here is present-day reference data from PokéAPI, not a snapshot of any one game's era — the Fairy type and hidden abilities arrived partway through the series, so a difference against an older game can belong to the series rather than to that ROM hack.