Kukui is a werewolf and rockruff is his child.
Rockruff just prefer his baby werewolf form.
The ring on his figure is to keep him in his human she'll do he can work as professor. Doing a full moon he transformed into a werewolf Pokemon. He is the finally boss on the game and you battle his human self and werewolf self. you let him live only if he stays in his werewolf form. Lillie is a fae and hala is a troll. You learn of a whole world where Pokemon are strong enough to take human designers