I am stuck with Charlotte :S 
This is my current team: 
- Swampert (lv 68) with  Rock Slide, Earthquake, Surf and Hammer Arm. Ability: Damp 
- Arcanine (lv 63) with Crunch, Flamethrower, Take Down and Agility. Ability: Intimidate 
- Hariyama (lv 62) with Knock Off, Close Combat, Heavy Slam and Force Palm. Ability: Thick Fat 
- Braviary (lv 62) with Defog, Brave Bird, Air Slash and Crush Claw. Ability: Sheer Force 
- Ampharos (lv 62) with Signal Beam, Power Gem, Thunder Wave and Discharge. Ability: Static 
- Beartic (lv 61) with Strength, Icicle Crash, Rest and Blizzard. Ability: Snow Cloak. 
I was thinking of using a Trick Room user, so that Swampert outspeeds everything and earthquakes them to death. I thought about trying it with a Heatproof Bronzong but I don’t know if it will be enough...