Well thats because they always have kept difference between anime series and player series

May, dawn and serena?

^That's right. I've always thought how unfair and ridiculous it is they included them and not the other series, especially the ones that don't include the player character like Black & White, X and Y/XYZ and Sun and Moon/Ultra Sun and Moon. Sure, there were the rare appearances of a few of the player characters like Brendan, Lucas and Ethan in the movies plus Jimmy in Chronicles (heavily based on Ethan/Gold), but no actual speaking and major parts which was really unfortunate and disappointing.