What is your opinion on the accusation that the female Pokémon characters’ outfits are sexist because all or most of them show a lot of leg?’

Never really thought about it, to be honest.  I’m not sure where one draws the line between “Japanese fashion” and “objectification,” especially considering that sexism is a problem in Japan, and comes with its own cultural baggage and history that’s quite different to that of sexism in ‘the West,’ broadly defined, and with which I’m not terribly familiar…
I do believe most of their designers are male (or at least I don’t recall ever hearing about the work of a female designer at Game Freak, and the in-game representations of the company offices in Celadon City, Castelia City and so forth are overwhelmingly male-dominated, from memory), which is sort of unfortunate because it means they’re less likely to have considered it in those terms.  But I think I’ll just stop now, before I offend someone by babbling about subjects of which I know next to nothing.