When Pinkie Pie uncurls from a ball, the transformation sound from Transformers (1984) is heard. Both My Little Pony and Transformers are owned by Hasbro.
Pinkie Pie asks Twilight Sparkle if she has a sister that looks the exact same as her, and has a dog named Spike that looks exactly like her dog, hinting at the fact that there is an alternate Twilight Sparkle, just the same as everyone else.
It has been stated by Meghan McCarthy and others who work on the cartoon that the events of this film will have no bearing or effect on season four of My Little Pony: Friendship Is Magic (2010), responding to the concerns of some fans who didn't want to see the show changed because of this film.
WILHELM SCREAM: Heard in the crowd after Sunset Shimmer tears apart the opening to the school.
Every time Twilight is about to tell all of them something, Pinkie Pie says it exactly.