So Rarity is Cinderella and Twilight is the fair godmother?  
Good casting.

EDIT: Wait, no, I’m wrong. In the background version of this, the artist says who is what. In the case of Twilight and Rarity, it’s  
“golden mary and pitch mary from mother hulda “

Hansel and Gretal, Goldilocks, Little Red Riding Hood, …… Cinderella (?)

I believe it would be “The Prince and the Pauper.”

I don’t know what the ones on the right are.  
Could someone tag them?