I guess its just Monster High without makeup.
(Is that how to spell makeup?)
first thing I thought of too. a little more wholesome that's for sure, since you don't really see a bunch of middle/elementary school age girls wearing short shorts, minidresses and tiny skirts! I guess Phantasma could be like either Ghoulia or Spectra.
Similar concept different execution. Execution is what counts in my book.
best monster based cartoon ever is a tossup between groovey ghoulies and gravedale high!
I'm surprised no one's used a CAM set to create a doll based on the characters from these cartoons yet, some of them fit very well into the Monster High style. And come on, who wouldn't want a doll of a character like Vinnie Stoker? I would pay good money to take home the Vampire version of the Fonz.
Here's some nice art of the Ghoul School girls as teens.
minus mini skirts and ultra high heels.