>>54889375They're not animals, but something similar, so for normal minds (not you obviously) it just feels wrong to sexualize them, even when they're humanoid, because they're still not quite human. Not to mention the fact that there's nothing explicitly sexual about Gardevoir design, other that it seems "girly".
Think of pic related for example, that's something that looks much more human, and it would make more sense to sexualize.