Every year, Rarity takes on too many Nightmare Night costume orders and winds up working herself silly and sleeping through all the festivities. Sweetie Belle is feeling left out when all of her friends' older siblings will be going with them this year, but Rainbow Dash is curiously gung ho to come up with a plan to fix that problem.
My (first) entry for the RariDash Spooktacular Writing Contest, and third place winner!. I also have a second entry. (The two stories are not otherwise related.)
Editing assistance by Azusa and Titanium Dragon.
Cover art vector credits (a lot):
Twilight, Applejack, Rainbow Dash, Rarity, CMC, Spike, Luna, Pumpkin