Hello. I do not remember a great deal about this movie but as far as I can remember it was about 2 or 3 girls... possibly princesses and I think one of them was 'evil' and she had long black hair... her name might have been raven and there was castles and other generic princess kids movie stuff. Please help I would love to see it again!

Umm, try this Lady Lovelylocks and the Pixietails (1987)

One of the characters is named Duchess Ravenwaves. There were also dolls that were made after the movie.

Ed.
Also there's a post a couple down from yours about this same movie someone posted some links on that one that may be helpful. Here's the link...
Kids movie/ TV 80's (obscure)