Cloyster is the Bivalve Pokémon, a dark mollusk with a pearl-like face, sealed inside a gray inner shell and a spiky blue-violet outer one. Its shell is harder than diamond and, once shut, cannot be opened from the outside.
Cloyster evolves from Shellder using a Water Stone. It is tied with Mega Slowbro for the highest base Defense stat of any Water type Pokémon, and shares its category with Clamperl.
Cloyster appears to be based on a bivalve of the genus Spondylus, with a black pearl serving as its head. Its Defense stat parallel with Mega Slowbro may reflect the fact that Slowbro's own tail Shellder grows to engulf it during Mega Evolution.
Cloyster's earliest card is the 1999 Fossil Uncommon illustrated by Kagemaru Himeno, followed by the Gym Heroes printing of Misty's Cloyster as a Rare by Ken Sugimori. Expedition Base Set added both a Rare and a Holo Rare version by Kyoko Umemoto.
Dragon Frontiers introduced a delta species Rare illustrated by Mitsuhiro Arita, and the 2023 151 set carried an Uncommon by Nelnal.
Cloyster's earliest card, the 1999 Fossil Uncommon by Kagemaru Himeno.
Expedition Base Set Holo Rare illustrated by Kyoko Umemoto.
Dragon Frontiers delta species Rare by Mitsuhiro Arita.
151 Uncommon illustrated by Nelnal.
Cloyster evolves from Shellder using a Water Stone.
Cloyster is tied with Mega Slowbro for the highest base Defense stat of any Water type Pokémon.
Our catalog lists 14 Cloyster cards across 13 sets.

パルシェン
Water · Ice
Cloyster is the Bivalve Pokémon, a Water and Ice type evolved from Shellder with a Water Stone, encased in a shell said to withstand a bomb blast or missile strike. Our catalog lists 14 Cloyster cards across 13 sets, including a delta species printing from Dragon Frontiers and a Holo Rare from Expedition Base Set.
ShellderCloyster