Trivia / My Little Pony: Friendship Is Magic S4 E3 "Castle Mane-ia"
I Knew It: Some fans, judging from the book in the Princess Twilight stained glass and the book Spike was holding in the new opening for the series, speculated that it was some sort of journal recording the lessons she and her friends learned. This episode confirmed the start of such a concept.
Teasing Creator: Meghan McCarthy was wearing her Shipping Goggles during her live Tweet session for this episode; she tweeted "Wishful thinking on Rainbow Dash's part?" in response to Dash telling AJ "You don't have to put your hoof around me".