Vincent Tong's voice for Garble was pitched down digitally from his original performance.
The Great Dragon Migration is said to occur only once per generation. In real life, a generation lasts about thirty years.
Fluttershy only appears in the cold open and is never seen again after running off, save for her appearance in one of the photos as Spike is writing his friendship report.
Friendship Report: Spike learned what he is on the outside isn't the same as who he is on the inside.
Fluttershy's fear of dragons is brought up again since "Dragonshy".