SSS Warrior Cats

SSS Warrior Cats is a fanime based loosely upon the first Warrior Cats book, "Into the Wild". Its plot is largely the same as that of the book, featuring the main protagonist Rusty getting bored of his simple life as a housecat, heading off into the woods in search of adventure, and joining one of the four feuding clans of feral cats who live in the forest, who grant him the new name Firepaw in honor of both his flame-colored pelt and a mysterious prophecy. However, the series adds new elements such as additional worldbuilding and noncanonical abilities for some characters.

This fanmade series is highly influential within the Warrior Cats fandom, and fanartists sometimes borrow elements of the characters' SSS designs even for fanart which is otherwise unrelated to this fanwork. Longtail's design in particular is somewhat frequently lifted directly or near-directly from SSS due to the books' authors disagreeing on his canonical appearance and many fans adopting it as a compromise; his SSS counterpart's pale yellow coloration was a fairly popular interpretation of the character even before SSS Warrior Cats was created, but the series further aided its popularity.