In anime fan-art, the question is really what qualifies as wearing short shorts. When they’re not just made of body paint, they’re often either halfway to her knees or wide open in the front. For some characters this is canonical, for others it’s wishful thinking by an artist who draws with one hand in his pants. Pokemon’s Misty/Kasumi, whatever age she’s drawn at, generally falls into the latter category. And, of course, the shortness of the short shorts is often emphasized with Ｍ字開脚.
There are quite a few characters whose official costumes include short shorts. Browsing through the search results on Gelbooru, it quickly became obvious that I could just do a top-20 list of the most obvious ones, without even coming close to running out. But I’m not trying to be comprehensive, just provide an amusing diversion, so if I missed your favorite girl as I skimmed through the hundreds of pages of results, it’s not because I don’t like the way she fills out her short shorts, it’s because there were too damn many pictures of Yoko from Gurren Lagann. Not that there’s anything wrong with that. 😉
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