Cloyster
Gold

Once it slams its shell shut, it is impossible to open, even by those with superi­ or 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 hard­ er than its shell.

Evolution Chain

shellder
Shellder
cloyster
Cloyster

Pokédex & Training Data

Classification Bivalve Pokémon
Height 1.5 m (4'11")
Weight 132.5 kg (292.1 lbs)
Abilities N/A in Gen II
EV Yield +2 defense
Catch Rate 60
Base Friendship 70
Growth Rate slow
Gender Ratio
♂ ♀
Egg Groups Water3

Pokédex Numbers

Kanto (R/B/Y) #091
Johto (G/S/C) #170
Johto (HG/SS) #172
Kalos (Coastal) #037
Alola (S/M) #116
Alola (US/UM) #139
Galar (Sw/Sh) #151
Paldea (S/V) #330
National #091
Isle of Armor #132

Held Items

None in this generation.

Learned Moves

Level Up Moves

Gold/Silver
Lvl Name Class Power Acc. PP Effect
1 Supersonic
— 55% 20 Confuses the target.
1 Aurora Beam
65 100% 20 Has a 10% chance to lower the target’s Attack by one stage.
1 Withdraw
— — 40 Raises the user’s Defense by one stage.
1 Protect
— — 10 Prevents any moves from hitting the user this turn.
41 Spike Cannon
20 100% 15 Hits 2-5 times in one turn.
Crystal
Lvl Name Class Power Acc. PP Effect
1 Supersonic
— 55% 20 Confuses the target.
1 Aurora Beam
65 100% 20 Has a 10% chance to lower the target’s Attack by one stage.
1 Withdraw
— — 40 Raises the user’s Defense by one stage.
1 Protect
— — 10 Prevents any moves from hitting the user this turn.
33 Spikes
— — 20 Scatters Spikes, hurting opposing Pokémon that switch in.
41 Spike Cannon
20 100% 15 Hits 2-5 times in one turn.

TM/HM Moves

Gold/SilverCrystal
Name Class Power Acc. PP Effect
HM03 Surf
90 100% 15 Inflicts regular damage and can hit Dive users.
HM06 Whirlpool
35 85% 15 Prevents the target from leaving battle and inflicts 1/16 its max HP in damage for 2-5 turns.
TM03 Curse
— — 10 Ghosts pay half their max HP to hurt the target every turn. Others decrease Speed but raise Attack and Defense.
TM06 Toxic
— 90% 10 Badly poisons the target, inflicting more damage every turn.
TM10 Hidden Power
60 100% 15 Power and type depend upon user’s IVs. Power can range from 30 to 70.
TM13 Snore
50 100% 15 Has a 30% chance to make the target flinch. Only works if the user is sleeping.
TM14 Blizzard
110 70% 5 Has a 10% chance to freeze the target.
TM15 Hyper Beam
150 90% 5 User foregoes its next turn to recharge.
TM16 Icy Wind
55 95% 15 Has a 100% chance to lower the target’s Speed by one stage.
TM17 Protect
— — 10 Prevents any moves from hitting the user this turn.
TM18 Rain Dance
— — 5 Changes the weather to rain for five turns.
TM20 Endure
— — 10 Prevents the user’s HP from lowering below 1 this turn.
TM21 Frustration
— 100% 20 Power increases as happiness decreases, up to a maximum of 102.
TM27 Return
— 100% 20 Power increases with happiness, up to a maximum of 102.
TM32 Double Team
— — 15 Raises the user’s evasion by one stage.
TM34 Swagger
— 85% 15 Raises the target’s Attack by two stages and confuses the target.
TM35 Sleep Talk
— — 10 Randomly uses one of the user’s other three moves. Only works if the user is sleeping.
TM39 Swift
60 — 20 Never misses.
TM44 Rest
— — 5 User sleeps for two turns, completely healing itself.
TM45 Attract
— 100% 15 Target falls in love if it has the opposite gender, and has a 50% chance to refuse attacking the user.

Tutor Moves

Crystal
Name Class Power Acc. PP Effect
Ice Beam
90 100% 10 Has a 10% chance to freeze the target.

Base Stats

Hp 50
Attack 95
Defense 180
Sp. Atk 85
Sp. Def 45
Speed 70
Total 525

Type Defenses

(vs. Gen 6+ rules)

0.5x
2x
2x
0.25x
2x
2x