I've built this Koko, Kyurem Black, Mega Medi team a couple of days ago and thought you might like it :] Koko could be made physical for a more powerful Z-Move if you want, I just don't like the recoil since Koko is also the defogger of the team and it should stay around as much as possible imo. The full description is in the paste itself. Much love :]
https://pokepast.es/6b60ceccba53a46f
https://pokepast.es/6b60ceccba53a46f