>>58165544
Because they didn’t bother trying. Cynthia’s popularity stems from
>a conventionally attractive design that is more “cool” than “cute/overly sexy”
>a very strong team within the constraints of the game’s dex, designed to counter the box legend
>a steep level spike at the end of the game giving her team the stat and damage calculation advantage
Their attempt at this, according to the leaks, was Diantha. In theory, an Audrey Hepburn-inspired champion should be popular, but her design looks like Lisa Simpson and she has a tacky cosplayer’s outfit, which undercuts any intended elegance or power. Her team is also fairly middling by XY’s dex standards (to say nothing of her IVs and AI settings each being lower than generic trainers), and the new exp share and incentive to use Amie more or less ensures that the average player will greatly outlevel Diantha by the end of the game.
If Gamefreak weren’t pussies, Diantha would have had an overpowered fairy pseudo bare minimum.