Board Thread:General Discussion/@comment-24589671-20150309010651/@comment-24950802-20150311030823

I think what happened with the original Dark Curse was, everyone in the Enchanted Forest (save for those protected under Cora's magic dome) was transported to Storybrooke BUT Regina made addendums, adding other people to those affected by the curse, which would explain why Frankenstein and the Mad Hatter were brought over when they were presumably in other lands when the curse was cast.

As for Maleficent's ashes, I'm fairly certain that in 2.20 she is already just ashes to begin with, and those ashes gather together to form the zombie-ghost thingy. How Greg and Tamara put a stop to her, that is also beyond is me.