I am not sure if it counts, but all those scenes with Dawn squatting down, tripping over, with the writers purposely putting one leg in front of her undergarments so you wouldn't see anything.
Seriously, what is the point of that fanservice? Even at Maylene's Gym during the cheerleader scene, she lifts her legs so high to kick that she puts the pom poms quickly in place afterward.
Pokemon is obviously NOT that kind of anime, so I don't understand why the writers tried alluding to it. Its almost as if the writers worked with Dawn's, "magic skirt" as best they could.