>>32053140It's especially weird since Nidoran females can breed, but the moment they evolve, they can't. Meanwhile, with pre-evos like Pichu and Riolu, they can't breed until they evolve.
I figured it was just a glitch when introducing genders in gen II, but they didn't correct it from gen III onward. That would imply it's a deliberate decision, which brings up a whole slew of uncomfortable implications.