Popplio all the way! And speaking of Sun and Moon, here's an OC of mine!

Perseus the "Water Prince" (yes I based him off Percy Jackson, I'm a huge fan of Rick Riordan, and I have no regrets)

He is a member of an Elite 4 as well.

His team is comprised of:

Primarina

Vaporeon

Milotic

Feraligatr

Lapras

Araquanid

and upon starting the special "Legend" challenge- Kyogre.