Cloyster has a spiky shell, six of which are long and conical, resembling turrets, which is used to protect its soft insides from foes. Cloyster has an an inner, gray-colored layer inside its purple shell. Its "head" and face resemble a black pearl, and there is a jutting, horn-like white spike above its "head".
Gender differences
None.
Special abilities
Cloyster has strong defenses and moderate offenses, both thanks to its sturdy shell. It fights by clamping its shell tightly shut while launching spikes from its shell to strike opponents.
Behavior
Cloyster is a clever and sneaky Pokémon, viciously rushing at prey shooting with spikes. It fights roughly because of the hostile nature of its habitat and the protection of its shell, allowing it to withstand physical blows easily. Cloyster swims by means of propulsion, doing so by first swallowing water, then jetting it out toward the rear. Cloyster may also shoot spikes from its shell using the same system.
Cloyster's most predominant appearance is under Lorelei, during the Elite Four saga of Pokémon Adventures, first used against Yellow in conjunction with her Dewgong. Later, in the battle on Cerise Island, it kept the voodoo dolls of Green and Sabrina (which kept their arms bound by an ice cuff) safely out of reach while Lorelei battled them. Although it initially seemed that with Green out cold, Sabrina stood little chance, she feigned attacking repeatedly and slowly sapped Cloyster's strength using Mega Drain, eventually fainting it. Lorelei realized this, and quickly took back the dolls.
Cloyster reappeared again in Lorelei's attempt to defend Seven Island. It is then remarked that Cloyster is the strongest fighter Lorelei has in her arsenal due to the tough shell it possesses, said to withstand the damage of a Napalm Bomb. However, though they fought valiantly and pushed Sird to her limits, ultimately the insidious villain won by having her Starmiecamouflage itself and attack where they couldn't defend.
In the Pokémon Adventures manga, Cloyster is drawn by Mato as having a blue marking like a jewel on its head, beneath the spike. The official art by Ken Sugimori, however, does not. This is likely because the white circle seen on Cloyster's head in most early sprites was interpreted by Mato as a jewel, but was actually intended just to be glare. Satoshi Yamamoto. who took over starting at Volume 10, did not make the same error.
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.
|- style="background:#74ACF5"
| colspan="13" | Bold indicates a move that gets STAB Italic indicates a move that gets STAB only from an Evolution of this Pokémon A colored initial indicates that the move is not available to be tutored in this game, while a colored background indicates that the move is available.
|}
|}
Therefore, Cloyster has the highest Defense of both Water and Ice-types, as well as the highest single stat of all Water-types with that Defense and the highest single base stat of all non legendary Ice-types. (Overall, behind only Regice's Special Defense)
Cloyster's cry is very similar to Fearow, aside from some differences in pitch and volume.
Despite Cloyster not resembling a human form, like Jynx, Cloyster's "head" pearl was changed from black to purple in Generation IV.
Strangely, Cloyster's head and face bear a striking resemblance to Gastly, which comes directly after it in the National Pokédex.
Cloyster’s Shiny color is blue. This has been treated by some as a reference to the 70’s band “Blue Oyster Cult”.
All of Cloyster's sprites depict it grinning.
Cloyster's Red and Blue Versions' sprite is incorrect, a phenomenon that is quite common in those games, but, oddly, its Red and Green Versions' sprite is actually rendered correctly.
Origin
It appears to be based on a bivalve, or more specifically, of the genus spondylus, with a black pearl as its head.
Name origin
Cloyster's name may be a combination of cloister, to seclude or shelter oneself, and oyster. It could also be a portmanteau of clam and oyster. Its Japanese name may be a combination of パール pearl and シェル shell.
This Pokémon article is part of Project Pokédex, a Bulbapedia project that aims to write comprehensive articles on each Pokémon species, as well as Pokémon groups and forms.
For other sprites and images, please see Cloyster images on Bulbagarden Archives.
