>>49951105Ignoring personal tastes I would say that Lillie being the one that has provided the most money to the franchise, (Dawn would surpass her if all the unofficial merchandise were included).
While game-wise it is obvious that Cynthia has become a female Red, integrating her into various games as a nostalgic hook.
And if we're talking about pornography, Gardevoir is the undisputed queen.
most of the pikachu images are male, so it's out, unless you swing that way. 