I am the who when you call "who's there?" I am the wind blowing through your hair... I am the shadow on the moon at night, filling your dreams to the brim with fright!
After the student body of Canterlot High is swayed by yet another surprise musical number during lunch, Sunset Shimmer muses the students are easily influenced by songs at this time. Pinkie quickly comes up with a song of her own.
Trixie hates pretty much everyone, especially high school students, so when she finds herself trapped in a mall with only the Dazzlings and a horde of zombies for company... she's fine with that.