Much of Sun and Moon is spent with Lillie bemoaning that she's not strong enough to be a trainer. Yet here she is, kickin' literal butt with the help of a little cutie called Cosmog.
Over at modding community GameBanana, SunSpirit has uploaded a skin that replaces the standard Rosalina model with Lillie, of the latest Pokemon games. When placed in the stadium stage, Lillie looks right at home:
Lillie, obviously, has all of Rosalina's moves — except Luma is replaced by Cosmog!
Some more screenshots:
You can download the mod here. The creator notes that it's safe to use over Wi-Fi because it's just a skin, making it likely the appearance is just client-side.