I just beat Charlotte but I've noticed that I have really struggled with some of the last few battles in this game, so I've decided to rework my team. Currently my team looks like this.
Swampert LV 68 with Muddy Water - Earthquake - Hammer Arm - Avalanche
Staraptor LV 65 with Brave bird - Double edge - Quick attack -Close combat
Silvalley (fighting) LV 65 with Multi attack - Iron head - X-scissor - Punishment
Alolan Muk LV 69 with Gunk shot - Venom drench - Acid armor - Knock off
Chandelure LV 64 with Flamethrower - Will-O-Wisp - Shadow ball - Curse
Lilligant LV 70 with Giga drain - Sleep powder - Quiver dance - Petal dance
So that's my team, would love some feedback.