Pokémon human drawing (ポケモン人間絵, Pokemon ningen e) is a tag for works about the humans from the Pokémon series. Pokémon is a story about people and Pokémon, and both fascinating human characters such as trainers and gym leaders and fascinating Pokémon appear in parallel.
Therefore, there are those who prefer humans in a sexual sense and those who prefer Pokémon themselves, but these two groups do not overlap much for various reasons. If the pictures are for the general public, mixing them up is not that big of a problem, but if they are for R-18, some people may feel uncomfortable, and this tag was created to avoid Pokémon (furry).
However, there is not a complete separation of the two, and even in the case of R-18 pictures, those that are more deformed and those who say that Pokémon is also good looking often do not have this tag attached. Therefore, pictures with this tag tend to be those drawn by people who are pushing eroticism to the forefront, having a sexy and fleshy appearance.
As a matter of fact, it is effective for negative searches because it excludes pictures that people who are looking for Pokémon (in general) tend not to want to see, but on the other hand, if you search only with this tag for human beings, you may miss some pictures.
It has existed since around one month after pixiv was launched, suggesting that the separation of the two began at a very early stage.
The tendency is that they are often attached to pictures with a high head height and strongly sexualized elements.