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#091 Cloyster
Ken Sugimori's artwork of Cloyster for Pokémon FireRed/LeafGreen.
Category Bivalve Pokémon
Original Region Kanto
National Dex Nr. #091
Johto #172
Hoenn #261
Kalos #037 (Coastal)
Alola #116 (Alola and Melemele Island) (Sun/Moon)

139 (Alola and Melemele Island) (Ultra Sun/Ultra Moon)

Galar #151 (Galar)

132 (Isle of Armor)

Generation 1
Pokémon Color Purple
Type(s) Water/Ice
Ability/ies Shell Armor, Skill Link
(Hidden: Overcoat)
Average Height 4'11"
Average Weight 292.1 lbs.
Evolves From Shellder, via Water Stone

Cloyster (Japanese: パルシェン Parshen) is a dual-type Water/Ice Pokémon.

It evolves from Shellder when exposed to a Water Stone.

Biology[]

Cloyster is a black, pearl-like Pokémon. It is encased inside a light grey shell, which is surrounded by a second jagged, blue-violet outer shell casing. It has one barb-like spike protruding from above its head, and multiple conical horns on its outer shell. Its shell is harder than diamond with spikes that are even harder; harsh tidal currents will affect the size and sharpness of these spikes. On its pearl-like face, it has two white eyes and a mouth. Aside from its face and head, its internal anatomy has never been seen.

It typically only opens its shell to attack an opponent. However, it is fully capable of retaliating against any enemy with its shell tightly closed. With rapid succession, it launches its spikes at the foe, keeping them repelled. Once it has shut itself in, it is impossible to open its shell from the outside. This impressive defense allows it to withstand anything from a bomb blast to even a missile strike. The same projectile system it uses to launch its spikes is also used for swimming. It swallows seawater, and then ejects it towards the rear propelling it through with siphon-jet propulsion. It lives on the sea floor, nestled among the rocks and coral.

Stats[]

Stat Range
At Lv. 50 At Lv. 100
HP: 50
110 - 157 210 - 304
Attack: 95
90 - 161 175 - 317
Defense: 180
166 - 255 328 - 504
Sp.Atk: 85
81 - 150 157 - 295
Sp.Def: 45
45 - 106 85 - 207
Speed: 70
67 - 134 130 - 262
Total: 525   Other Pokémon with this total  
  • The minimum stats were calculated with 0 EV's and IV's, plus a hindering Nature, if applicable.
  • The maximum stats are calculated with 252 EV's, 31 IV's, and a helpful Nature, if applicable.
  • In Generation 1, this Pokémon had a Special stat of 85.


Under normal battle conditions in current Pokémon canon, this Pokémon is...
Neutral to:
Normal
Fighting
Flying
Poison
Ground
Rock
Bug
Ghost
Steel
Fire
Water ½×
Grass
Electric
Psychic
Ice ¼×
Dragon
Dark
Fairy
None
Weak to:
Normal
Fighting
Flying
Poison
Ground
Rock
Bug
Ghost
Steel
Fire
Water ½×
Grass
Electric
Psychic
Ice ¼×
Dragon
Dark
Fairy
None
Resistant to:
Normal
Fighting
Flying
Poison
Ground
Rock
Bug
Ghost
Steel
Fire
Water ½×
Grass
Electric
Psychic
Ice ¼×
Dragon
Dark
Fairy
None
Immune to:
Normal
Fighting
Flying
Poison
Ground
Rock
Bug
Ghost
Steel
Fire
Water ½×
Grass
Electric
Psychic
Ice ¼×
Dragon
Dark
Fairy
None
Notes

{{{note}}}

Fanon appearances[]

St. Clair Publications[]

All canon Pokémon are available in Tropes vs. Women in Pokémon Training; however, Cloyster cannot be caught out in the wild. In this game, Cloyster has a regional variant that resembles the Shellder seen on Slowbro and Slowking and is Ice/Rock. Likely winning the award for the most drastically-changed Pokémon in the entire game, it evolves from this form of Shellder via Ice Stone, and its abilities change to Shell Armor, Rock Head, and Sturdy. Its stats are unchanged. Furthermore, its one of extremely few Pokémon in this game to have its Pokédex classification changed, as it's clearly not a "bivalve" in this form!

Cloyster
#91 Bivalve Pokémon

HT: ??? WT: ???

Anitra Karskisian really hates this Pokémon, despite being an Ice-type specialist. No one really knows why...

 
Shellder Water Stone
Shellder Water Stone

Sanclairian
Cloyster

#91-TvW Conch Pokémon

HT: 5'11" WT: 292.1kg

A bottom-feeder, this Pokémon essentially eats by vacuuming up the leftovers of what other Pokémon, including regular Cloysters, eat. Exactly what happens when this Pokémon bites a Slowpoke is unknown.

 
Shellder Ice Stone
Shellder Ice Stone
Under normal battle conditions in TvW, this Pokémon is...
Neutral to:
Normal ½×
Fighting
Flying ½×
Poison ½×
Ground
Rock
Bug
Ghost
Steel
Fire
Water
Grass
Electric
Psychic
Ice ½×
Dragon
Dark
Fairy
None
Weak to:
Normal ½×
Fighting
Flying ½×
Poison ½×
Ground
Rock
Bug
Ghost
Steel
Fire
Water
Grass
Electric
Psychic
Ice ½×
Dragon
Dark
Fairy
None
Resistant to:
Normal ½×
Fighting
Flying ½×
Poison ½×
Ground
Rock
Bug
Ghost
Steel
Fire
Water
Grass
Electric
Psychic
Ice ½×
Dragon
Dark
Fairy
None
Immune to:
Normal ½×
Fighting
Flying ½×
Poison ½×
Ground
Rock
Bug
Ghost
Steel
Fire
Water
Grass
Electric
Psychic
Ice ½×
Dragon
Dark
Fairy
None
Notes

{{{note}}}

Gallery[]

Artwork[]

Sprites[]

Trivia[]

  • Cloyster is tied with Mega Slowbro for the highest base Defense of all Water-type Pokémon.
  • Cloyster and its pre-evolution share their species name with Clamperl. They are all known as the Bivalve Pokémon.
  • Cloyster is the only Ice-type Pokémon in the Water 3 Egg Group.

Origin[]

It appears to be based on a bivalve of the genus Spondylus with a black pearl as its head.

Name origin[]

Cloyster may be a combination of clam and oyster. It may also be a play on cloister (to seclude or shelter oneself).

Parshen may be a combination of パール pearl and シェル shell.

National Pokédex
Shellder
← #090: Shellder
Cloyster
#091: Cloyster
Gastly
#092: Gastly →