I started to think why there aren't that many female competitive players. I think that it's because females aren't interested in this kind of stuff, but I hit a major obstacle in that thought, because a fair amountof the females I know play uncompetetive Pokemon in my school like D/P/FR/LG, but no one plays actual competetive Pokemon like we do.
This is like asking 'why are there not as many female mechanics as male?' Video gaming,
especially as a serious hobby which requires a lot of commitment, is traditionally -- and obviously as a girl whose every pastime is pretty nerdy I disagree with this mindset, but I won't ever argue that it isn't popularised -- considered a male-dominated field. This makes it harder for girls to actually get into it, seeing as, you know, 'oh wow a real girl on the internet... playing pokémon...!!' A lot of people get into things their friends are interested in -- which is how I got into competitive battling, having friends who played -- and if you feel too out of place, you might feel discouraged, I guess?
Plus a lot of girls consider it themselves to be pretty nerdy [and to them, therefore boyish ~_~]. Also, the competitive battling community is
mostly centred around the internet [especially for people who don't live in major cities and/or the USA], and there are far more guys in the gaming community in the first place.
It's just a natural 'weird interest'; try to logically dissect it all you like, but I don't believe you'll get anywhere. Why are there more girls on Hello Kitty MMOs [I am assuming this, though x_x] than boys? Because girls, as a result of the way they're brought up by society and their parents [their image of 'femininity'], and their natural inclinations as people themselves, are more interested in Hello Kitty, which is marketed towards them. Nintendo have made plenty of efforts to market Pokémon to girls but ultimately the main attraction will be to boys.
I know there are many on Smogon who didn't start playing the carts at RBY, but a lot did when they were little kids, and it was still pretty boy-dominated from the early age. Hell, you couldn't even use a female character in-game until Crystal.
Where is Kristy Haruka? I'm sure she could enlighten us ^_^ You know, I'm probably wrong on some points, because I can't argue for individuals, but this is just generally what I find from other girls, even on the internet. You have to generalise to a degree to make arguments in a thread entirely about generalisations.
ETA: And, yes, girls are just as competitive -- on different fields often, but oh my God... x_x
Gen Empoleon is Injustice, IIRC, who I am
fairly sure is male.