Overview
Pokémon (derivative work) (ポケモン(二次創作), Pokemon (nijiteki), lit. "Pokémon (secondary creation)") refers derivative works of the copyrighted work Pokémon, a series produced by Game Freak and marketed by Nintendo.
Because of its enormous content and popularity, it is one of the most active works in terms of derivative works, and many illustrations, doujinshi and anthologies, and other works have been produced by fans as derivative works.
Pixiv is no exception to this rule, and samples of items and publications from circles are uploaded.
As long as they are derivative works of official works or works derived from official works, it is necessary to observe the minimum manners.
For details, see the article on Derivative Work.