According to Tom Cosgrove, the General Manager of Discovery Family, a series reaching 100 episodes is considered a "tremendous accomplishment".
Friendship Is Magic was not expected to reach this mark when the show started back in October 2010, according to Hasbro Studios executive director Brian Lenard, who had worked on the show from its inception. Lenard attributed the show's success in part to the reaction of the older fanbase of
bronies, which allowed the show to grow organically with the interest of fans on other characters besides the main characters; According to the episode's writer,
M.A. Larson, Hasbro proposed using the 100th episode to focus on background ponies, an idea which Miller initially argued against. Writer
Amy Keating Rogers was originally assigned to write the episode's screenplay, but due to scheduling issues, she exchanged episodes with Larson to write the previous episode "
The Lost Treasure of Griffonstone". The episode was first publicly discussed on a
My Little Pony panel at the 2014
San Diego Comic-Con, where the crew mentioned the episode's focus on background and minor characters popularized by the show's fandom.
Meghan McCarthy said in a Q&A session at
Australia's 2015 PonyCon that the episode would not focus on the main characters, and that some featured characters' personalities would be based on fan interpretations, including "Doctor Whooves", whose name fans coined for his purported likeness to
David Tennant's portrayal of
the Doctor from the British television series
Doctor Who. According to episode writer
M.A. Larson, two working titles for the episode were "A Tour of Ponyville" and "A Tour of Equestria", and the episode originally featured Twilight Sparkle in a more prominent role prior to his involvement. In Larson's initial drafts, the episode also featured several other supporting characters, including
Flash Sentry,
Coco Pommel, and the royal guards, whose scenes had been cut for time. The music that played in DJ Pon-3's headphones was arranged from
DJ Snake and
Lil Jon's "
Turn Down for What". Kora Kosicka designed the bugbear. Rebecca Dart and Phil Caesar designed DJ Pon-3 and Octavia Melody's house. Electric cellist
Tina Guo performed Octavia's cello part during the episode's final sequence. During the episode, there is a split-second appearance of a group of people wearing
horse head masks; they are storyboard supervisor Timothy Packford (black horse mask), director Jim Miller (brown horse), storyboard artist Katrina Hadley (pink horse),
Friendship Is Magic supervising director Jayson Thiessen (white unicorn), and
Rainbow Rocks co-director Ishi Rudell (zebra). == Broadcast and reception ==