Made a niche little Mega Mewtwo Y team with terrain extender Tapu lele to stop all those pesky Marshadows from Shadow sneaking mewtwo to possibly revenge it along with stopping Yveltal if it's carrying sucker punch. Along with that there is a Z heal bell Magearna to cleanse the team if need be a phys def Primal Groudon along with Mixed attacking Primal Kyogre https://pokepast.es/f237bc4597bf0898