So I'm having some trouble with Charlotte and when I say trouble I mean I can't get past her first two pokemon.
My current team as of writing this is
Mamoswine- level 57 with Thick Fat, NeverMeltIce, and (I'm not sure if nature matters) Jolly.
AncientPower, Ice Fang, Earthquake, Blizzard
Mamoswine- level 56 with Thick Fat, Icicle Plate, and Impish.
AncientPower, Ice Fang, Earthquake, Blizzard
Roserade- level 63 with Technician, Rose Incense, and Hasty
Mega Drain, Grassy Terrain, Nature Power, Stun Spore
Simipour- level 60 with Gluttony, Mystic Water, and Jolly
Brine, Surf, Dive, Crunc