My Little Pony: Equestria Girls - Twilight's Sparkly Sleepover Surprise is a Tie-In Novel of My Little Pony: Equestria Girls. Chronologically, its events take place after Friendship Games but before Legend of Everfree. The story is about Twilight Sparkle adjusting to her new life at Canterlot High with her new friends.
This book provides examples of:
- Contrived Coincidence: In Rarity's slumber party game Spin The Nail Polish, Rainbow Dash had all of her nails painted red. There are nine different nail polish colors,note meaning there is a 1 out of 9 chance to pick red. For all 10 of Rainbow Dash's nails to get painted red, raise 1/9 to the 10th power. The formula here is (1/9)10, which equals to 1/348,678,401. This means that Rainbow Dash had a 1 in over 300 million chance to have the same color for all ten of her nails.
- It is unknown whether the girls painted their fingernails only, or also their toenails. If so, then the equation for Rainbow Dash having red picked for all 20 nails even lower. The equation is now (1/9)20, which equals to around 8.22526334×10−20.
- Russian Reversal: How Rarity describes her Spin The Nail Polish game encompasses this trope perfectly.
Rarity: In this game, we don't choose the colors; the colors choose us!
- Slumber Party: Obviously in the book's name, these are front-and-center in the story.
