#0091 Cloyster

Artwork: PokéAPI.

WaterIce

Abilities

Shell ArmorReduces physical damage taken by 25%.Skill LinkIncreases the frequency of multi-strike moves.

Hidden ability

OvercoatImmune to sandstorms and powder moves.

Capture

Moderate catch

Gender

50.0% female

Egg groups

Water 3

Growth

Slow

EV yield

2 Defense

Wild held item

Pearl, Big Pearl

Cloyster’s base stats

HP	80 (official 50)
Attack	100 (official 95)
Defense	130 (official 180)
Sp. Atk	60 (official 85)
Sp. Def	85 (official 45)
Speed	70
Total	525	Official games: 525, same total, different spread. All base stat changes

Where to find it

Chance per encounter, under the conditions shown.

Times and conditions

• Morning: 4:00–9:59
• Day: 10:00–19:59
• Night: 20:00–3:59

Calendar encounters can replace a land slot on specific dates.

Where to find Cloyster in the wild

Location	Method / conditions	Level	Chance
Seafoam Islands B4F / Seafoam Islands, inner room	Grass/cave, morning	38	10%
Seafoam Islands B4F / Seafoam Islands, inner room	Grass/cave, day	38	10%
Seafoam Islands B4F / Seafoam Islands, inner room	Grass/cave, night	38	10%
Route 41	Super Rod	40	30%
Five Island	Super Rod	40	5%

Evolution

Evolves from Shellder using Water Stone.

Level-up moves

“On evolution” moves are learned when this Pokémon evolves. Open a move for its full effects and any special behavior in this hack.

Cloyster’s level-up moves

Level	Move	Type	Category	Power	Accuracy	PP	Effect and notes
On evolution	Icicle Spear	Ice	Physical	25	100	30	The user launches sharp icicles at the foe. It strikes 2 to 5 times in a row.
1	Icicle Spear	Ice	Physical	25	100	30	The user launches sharp icicles at the foe. It strikes 2 to 5 times in a row.
1	Icicle Crash	Ice	Physical	85	90	10	The user slams huge icicles into the foe. It may make the foe flinch.
1	Toxic Spikes	Poison	Status	—	—	20	The user lays a trap of poison spikes at the foe’s feet. They poison foes that switch into battle.
1	Spikes	Ground	Status	—	—	20	The user lays a trap of spikes at the foe’s feet. The trap hurts foes that switch into battle.
1	Leer	Normal	Status	—	100	30	The foe is given an intimidating leer with sharp eyes. Lowers its Defense by 1 stage.
1	Whirlpool	Water	Special	40	90	10	Traps the target in a whirlpool, damaging it for 2–5 turns.
1	Supersonic	Normal	Status	—	55	20	The user generates odd sound waves from its body. It may confuse the target.
1	Aurora Beam	Ice	Special	65	100	20	The foe is hit with a rainbow-colored beam. 10% chance to lower its Attack by 1 stage.
1	Protect	Normal	Status	—	—	10	It enables the user to evade all attacks for 1 turn. Its chance of failing rises if used in succession.
1	Razor Shell	Water	Physical	75	95	10	The user slashes with sharp shells. It may lower the foe’s Defense.
1	Iron Defense	Steel	Status	—	—	15	The user hardens its body’s surface like iron. Raises its Defense by 2 stages.
1	Ice Beam	Ice	Special	90	100	10	The foe is struck with an icy-cold beam of energy. It has a 10% chance to freeze the target.
1	Shell Smash	Normal	Status	—	—	15	The user breaks its shell. Its Defense and Sp. Def fall, but Attack, Sp. Atk, and Speed sharply rise.
1	Hydro Pump	Water	Special	110	90	10	Blasts the target with a huge volume of water.
1	Tackle	Normal	Physical	40	100	35	A physical attack in which the user charges and slams into the foe with its whole body.
1	Water Gun	Water	Special	40	100	25	Blasts the target with water. Does not burn the target.
1	Withdraw	Water	Status	—	—	40	The user withdraws into its shell to toughen its body. Raises its Defense by 1 stage.
1	Ice Shard	Ice	Physical	40	100	30	The user flash freezes chunks of ice and hurls them. This move always goes first.
1	Spike Cannon	Water	Physical	20	100	15	Fires sharp spikes at the target 2–5 times.
50	Skull Bash	Steel	Physical	120	100	10	Lowers its head and strikes with a powerful headbutt. After attacking, has a 50% chance to raise Defense by one stage. Can also hit airborne targets.

TMs and HMs

TMs and HMs Cloyster can learn

TM / HM	Move	Type	Category	Power	Accuracy	PP	Effect and notes
TM03	Water Pulse	Water	Special	60	100	20	The user attacks with a pulsing blast of water. It has a 20% chance to confuse the foe.
TM07	Hail	Ice	Status	—	—	10	The user summons a hailstorm lasting 5 turns. It damages all Pokémon except Ice types.
TM10	Hidden Power	Normal	Special	60	100	15	A unique attack that varies in type and intensity depending on the Pokémon using it.
TM13	Ice Beam	Ice	Special	90	100	10	The foe is struck with an icy-cold beam of energy. It has a 10% chance to freeze the target.
TM14	Blizzard	Ice	Special	110	70	5	A howling blizzard is summoned to strike the foe. It has a 10% chance to freeze the target.
TM15	Hyper Beam	Normal	Special	150	90	5	The foe is attacked with a powerful beam. The user must rest on the next turn to regain its energy.
TM16	Light Screen	Psychic	Status	—	—	30	A wondrous wall of light halves the damage from special attacks for 5 turns.
TM17	Protect	Normal	Status	—	—	10	It enables the user to evade all attacks for 1 turn. Its chance of failing rises if used in succession.
TM18	Rain Dance	Water	Status	—	—	5	The user summons a heavy rain for 5 turns. Water-type moves become 1.5 times stronger.
TM27	Return	Normal	Physical	var.	100	20	A full-power attack that grows more powerful the more the user likes its Trainer.
TM32	Double Team	Normal	Status	—	—	15	By moving rapidly, the user makes illusory copies of itself. Raises its evasiveness by 1 stage.
TM41	Torment	Dark	Status	—	100	15	The user torments and enrages the foe, making it incapable of using the same move twice in a row.
TM42	Facade	Normal	Physical	70	100	20	An attack whose power is 2 times higher if the user is poisoned, burned, or paralyzed.
TM44	Rest	Psychic	Status	—	—	5	The user goes to sleep for 2 turns. It fully restores the user’s HP and heals any status problem.
TM45	Attract	Normal	Status	—	100	15	The user charms a foe of the opposite gender. The foe has a 50% chance of being unable to act.
TM55	Brine	Water	Special	65	100	10	If the foe’s HP is below half, this attack hits with double the power.
TM58	Endure	Normal	Status	—	—	10	The user endures any attack with at least 1 HP. Its chance of failing rises if it is used in succession.
TM64	Explosion	Normal	Physical	250	100	5	A huge explosion hits all Pokémon in battle, and the user faints. The targets’ Defense is halved.
TM66	Payback	Dark	Physical	50	100	10	The user charges up, then attacks. If it moves after the foe, its power is doubled.
TM68	Giga Impact	Normal	Physical	150	90	5	The user charges at the foe using every bit of its power. The user must rest on the next turn.
TM72	Avalanche	Ice	Physical	75	90	10	Hurls hailstones at the target. Has a 30% chance to make the target flinch.
TM82	Sleep Talk	Normal	Status	—	—	10	While it is asleep, the user randomly uses one of the moves it knows.
TM84	Poison Jab	Poison	Physical	80	100	20	The foe is stabbed with a poison tentacle. It has a 30% chance to poison the foe.
TM87	Swagger	Normal	Status	—	85	15	The user enrages the foe into confusion. However, it also raises the foe’s Attack by 2 stages.
TM90	Substitute	Normal	Status	—	—	10	The user makes a copy of itself using 1/4 of its HP. The copy serves as the user’s decoy.
TM118	Smart Strike	Steel	Physical	70	—	10	Stabs the target with a sharp horn. This attack always hits.
TM122	Liquidation	Water	Physical	85	100	10	Strikes the target with water power. May lower the target’s Defense.
HM03	Surf	Water	Special	90	100	15	A giant wave swamps the whole battlefield. Double damage on a foe using Dive. Also used to cross water.
HM05	Whirlpool	Water	Special	40	90	10	Traps the target in a whirlpool, damaging it for 2–5 turns.

Move tutors

Moves Cloyster can learn from tutors

Move	Type	Category	Power	Accuracy	PP	Effect and notes	Tutor location, cost and requirements
Dragon Dance	Dragon	Status	—	—	20	The user performs a mystic dance. Raises its Attack and Speed by 1 stage.	Blackthorn Gym · Cost: Free Requirements: Blackthorn Gym: Clair's dragons-only rule (story; the Rising Badge) Blackthorn Gym
Ice Shard	Ice	Physical	40	100	30	The user flash freezes chunks of ice and hurls them. This move always goes first.	Seafoam Islands, inner room · Cost: Free Requirements: Seafoam Islands: the ice walls, Articuno and the researcher (TM14 Blizzard) Seafoam Islands, bottom floor
Icicle Spear	Ice	Physical	25	100	30	The user launches sharp icicles at the foe. It strikes 2 to 5 times in a row.	Ice Path · Cost: Free Requirements: Ice Path / Blackthorn City: small extras Ice Path
Icy Wind	Ice	Special	55	95	15	The user attacks with a gust of chilled air. Lowers the target’s Speed by 1 stage.	Route 20 · Cost: Aspear Berry ×1 Route 20
Shell Smash	Normal	Status	—	—	15	The user breaks its shell. Its Defense and Sp. Def fall, but Attack, Sp. Atk, and Speed sharply rise.	Violet City · Cost: Free Requirements: Violet City: Gyro Ball TM for the Forretress kid (unlocks Shell Smash) Violet City
Weather Ball	Normal	Special	50	100	10	An attack move that varies in power and type depending on the weather.	Route 25 · Cost: Free Route 25

← #90 ShellderAll Pokémon#92 Gastly →