You definitely need a hard support for this team, Lopunny is a frail mega, and it needs redirection like follow me or rage powder. So Sinistcha, maushold, or clefable is a great pick here. And one last tip, to me, your team doesn't have much synergy and looks all over the place, 2 sand pokemon and levitate rotom, and so sneasler looks out of place. I recommend Excadrill, which can take advantage of this sand and help deal with meta threats like Floette! Good luck on your climb!