>>56239781>>56239591>it isn't. You're a coomer>meant as satire or to appeal to furriesA huge portion of Japanese drawn porn is simultaneously satire/parody and coomer shit at the same time. Going all the way back to the carved woodcuts of the fisherman's wife banging a squid. The nation has a very easy sense of humor when it comes to anything relating to nudity or human anatomy, hence the nudity in the pokemon gag manga.
So I think what happened was similar to what happened with the Sonic franchise. I don't think Vaporeon and Gardevoir were designed to be sexy. But in the West where anthro porn is big, they were clear winners from the beginning. The Japanese saw what the West was drawing and decided to pander, so Sonic Team gave us a bat with tits, and Gamefreak gave us Lopunny.