>>44654535All visuals of the dance have only been about getting faster, not by removal of scales or leaves or anything of the sort. Its strictly just a dance to get faster and permissibly stronger. Mystical Afterimages were even used in the first anime's showing, something that a magical Fairy/Psychic pokemon like Kirlia or Gardevoir could pull off fairly nicely.
Look, all I'm saying is visually and thematically this particular move would fit perfectly fine on this mon, there are so many other pokemon that have odd moves with slightly changed up flavor to better symbolize it on the pokemon. For a Kirlia, its not stretching your imagination by any means to see this Pokemon performing some type of magical dance to empower itself.