Twilight:
I feel like you'd have to beg her to dress up and she would go with Raven since she only really had to fix her hair😂
Sunset:
She'd be more into the "scary"costume like victim xkiller
Pinkie:
IT FITS OK
Rainbow dash:
I feel like she'd go simple but scary like vampire but she would be the masc one🤌
Applejack:
TELL ME SHE WOULDNT!
Rarity:
She design it herself.
Adagio:
She'd love the dress and the musical
Fluttershy:
Just her style