Cloyster

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

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.

Evolution chart

Shellder
#090
Shellder
Water

(use Water Stone)
Cloyster
#091
Cloyster
Water · Ice

Name origin

clam
marine creature
oyster
marine creature
cloister
isolated religious building

Moves learned by Cloyster

Cloyster sprites

Type Generation 1 Generation 2 Generation 3 Generation 4 Generation 5 Generation 6 Generation 7
Normal Cloyster  sprite from Red & Blue Cloyster  sprite from Silver Cloyster  sprite from Ruby & Sapphire Cloyster  sprite from Diamond & Pearl Cloyster  sprite from Black & White Cloyster  sprite from X & Y
Shiny Cloyster Shiny sprite from Silver Cloyster Shiny sprite from Ruby & Sapphire Cloyster Shiny sprite from Diamond & Pearl Cloyster Shiny sprite from Black & White Cloyster Shiny sprite from X & Y

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