(Replace the guitars with an organ piano plz-)

Carol

Team:
Spiritomb (40): Hypnosis, Dream Eater, Sucker Punch, Curse

Mimikyu (40): Wood hammer, Shadow Claw, Play rough, Thunder bolt

Banette (40): Sucker Punch, Phantom force, Will-o-Wisps, Infestation

Organog (40): Night whistle, Shadow ball, Parting shot, Perish Song

Mega Gengar (40): Sucker punch, Shadow punch, Hynosis, Dream eater

Alolan Marowak (42): Shadow Bone, Will-o-Wisps, Thunder punch, Bone club

Rewards for beating her: The graveyard charm, TM for Perish Song, some ingredients, and a shadow tag

Her pokejob is of a grave keeper. That means ur pokemon get to bury dead pokemon.

Lovely. :)