I believe that if Harley Quinn was on roller skates and Batman had to apprehend her, he would simply level the playing field and chase her on skates too. I trust him to be a man of equality in this regard
Not only would he chase her on skates, he would press a button on his utility belt and his boots would transform into a pair of roller skates. This would be played completley straight, and never mentioned again.
Robin would just have Heelys
I’m delighted to tell you that you’re 100% right and it’s canon to this movie
THE GIF