>>36289901>You're associating her shorts with her somehow having a big ass.Looks big enough for pokemon franchise standards on
>>36281840 for me(inb4 Wicke, she is just fat), so I have no reason to believe her ass isn't big.
As for the other matter:
If their battle sprites are canon enough for you, then her ass is at least bigger than Rosa's. As for how does her ass compares to the other pokegirls, I'll admit I don't think it is possible to know currently.