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Cylin are an original creation by the PokePlushies' artist Quetzal. These cute little creatures are always seen wearing hats and scarves, and have an adorable lack of legs.

Please note that I will only be including Cylin here that aren't one of a kind customs made for a single person.

Contest Cylins
Octopus Cylin The octopus Cylin was the very first cylin to be won by the PokePlushies public. In her thread, "What would you do for a Cylin?" Quetzal sent this adoptable as a prize to the people whose answers she liked.
Snow Leopard Cylin This is the second Cylin, given away to four roleplay contest semifinalists. The winning design is based on Cynn's entry, Uncio the snow leopard.
Leopard Cylin As promised, another version of the roleplay contest adoptable was released to everyone if they could find one first. 40 total were released, scattered across adoptables with the IDs 80,000-120,000.
Sketch Grey Wolf Cylin These wolf Cylin were first given to people who succeeded in making Quetzal laugh, but after rampant rule breaking, the sketch Cylin was given to people who wrote a poem or drew a picture of a Cylin.

Cash Shop Cylins
Spring Dragon Cylin Summer Dragon Cylin Autumn Dragon Cylin Winter Dragon Cylin
These four were the first Cylin available to acquire in a way other than winning a contest. They are also the first set of adoptables with a seasonal theme, and are now retired.

Other Cylins
Orca Cylin Glass Orca Cylin
During a pruning of the forums, unofficial adoptable museums were accidentally deleted. In apology, Quetzal released this Cylin, formerly her own custom. The regular one cost 20 DP, and the glass one was made as a sort of trophy for those who could not afford the 20 DP for the regular one. They are untradeable, and cost 5 DP.