Ash needs a female in his group. An speaking of which, that opening was absolutely gorgeous!! I was close to shedding a tear because of how Ash centric it was.
The teams are oddly gender restricted this series. Sophocles' Togedemaru is the only gender cross (unless Kiawe's Charizard happens to be female too).
I find it a shame the other companions aren't getting much focus, though I don't begrudge Ash as the star, he at least earned it this series.