- Ascended Fanon: The oldest instances of Rarity wearing a Guard Uniform date back to 2011.
- Blooper: When Twilight goes in-depth about the sibling rivalry, Spike suddenly disappears when she flies.
- For years, one of the more popular interpretations of Twilight and Spike's relationship was that of mother-and-son, since Twilight hatched Spike's egg. This episode finally confirms that their relationship has always been Like Brother and Sister instead. Additionally, it shows Spike was reared in Twilight's household, jossing the Word of Faust that he was reared by Celestia.
- The fact that space exists shows that the universe G4 is set in uses "planets" unlike some fantasy worlds which use "planes of existence".
- Milestone Celebration: This episode serves as the 200th episode of the series, according to Jim Miller, with "Best Gift Ever" being counted as the 196th.
- Written by Cast Member: The episode is made up of the entire main cast's top picks for things they wanted to do with their characters that hadn't happened yet. They thus get a joint "Story By" credit:
- Tabitha St. Germain: Rarity organizes a heist, which serves as the backbone of the episode.
- Andrea Libman: Pinkie Pie goes into space, and Fluttershy gets a Badass Adorable scene as a super spy; both happen in an Imagine Spot.
- Ashleigh Ball: Applejack is revealed to have a double life as a country singer, and Rainbow Dash gets more interaction with Zephyr Breeze; these play into both ponies' attempts to distract the guards.
- Cathy Weseluck: Spike's family relationship with Twilight is explored, solidifying them as being Like Brother and Sister, which is a prime motivator for Spike in this episode.
- Tara Strong: Twilight has long-standing Sibling Rivalry with Shining Armor, which ties the entire plot neatly together.
- Working Title: The episode was announced in scheduling media as "Twilight's Seven", but the in-episode title, as well as used by Discovery Family in the days leading up to it, was "Sparkle's Seven".
Trivia / My Little Pony: Friendship Is Magic S9 E4 "Sparkle's Seven"