Andrea Libman does Fluttershy's singing voice, but not Pinkie Pie's. She stated the reason is because Pinkie Pie's high pitched voice tends to be a strain and that singing with it really hurts her throat.
Pinkie Pie says her full name is Pinkamina Diane Pie, however Lauren Faust once said that Pinkie may not have been 100% truthful about this.
Princess Celestia owns a Phoenix called Philomena.
The phrase "My little ponies" is used several times to describe secondary characters, the Cutie Mark Crusaders; Applebloom, Scootaloo, and Sweetie Belle
In several episodes, there is a brown male pony with an hourglass for a cutie mark who is believed to be created after the Doctor is Doctor Who. Therefore, the pony' s name is Doctor Whooves.
Broke My Little Pony 'n Friends (1986) record of being the longest running My Little Pony TV series. Furthermore, at 100+ episodes, this series is also the longest running individual television series featuring a Hasbro toy property in the company's history.
Spike is voiced by a female
Applejack is the only main character to remain mostly the same to the character she was based on. The other five main pony characters are all amalgamations of several characters from past generations of the show
Twilight Sparkles appearance is based on a pony character from the first series; Twilight Velvet who makes appearances as Twilight Sparkles mother.
Almost all of the main voice actors have worked on previous versions of My Little Pony.
Background pony Derpy had her eyes fixed and voice changed by Hasbro in a bid to make her seem "less disabled".
Lauren Faust has said that she always felt that the Cutie Mark Crusaders - Apple Bloom, Scootaloo and Sweetie Bell - should have their own spin-off show aimed at preschoolers - where children learn how to do various activities as the three ponies try them out looking for their Cutie Marks.
While the show is labled for younger female audiences many of the jokes and references in the show have adult themes to them. Some include references to alcohol, movies for adults (like The Big Lebowski), and a few references to older bands and music (like Diamond Dogs).
Initial toys for Princess Celestia showed her with a pink coat, rather than white as is in the show. This is apparently due to Hasbro thinking a pink toy would sell better to young girls. Since a canon pink princess character - Cadance - was introduced, toys of Celestia have been released in show-accurate white.
Rainbow Dash is the only main character to feature a "cutie mark" that is a single symbol. Rarity, Applejack, Fluttershy, and Pinkie Pie all have "cutie marks" that are displayed in a cluster of three. Twilight Sparkle has a huge sparkle surrounded by five little sparkles.
According to series creator Lauren Faust, the inspiration for Canterlot was the city of Minas Tirith from The Lord of the Rings trilogy.
Because of the show's overwhelming popularity, which generates a high volume of fan-related content, the show creators have to do their research to make sure any one of the several pre-existing characters they wish to feature in an episode don't use a name that in any way sounds similar to one created by the fan base.
Minor recurring villain Trixie was originally planned to be a boy, until the episode's scriptwriter suggested to Lauren Faust to make the character female. Faust later said that the change was absolutely for the better.
Some of the cities mentioned in the series are puns: Fillydelphia, Manehattan, Baltimare, Las Pegasus, Saddlarabia, Cloudsdale and Trottingham.
The character of Princess Celestia was originally supposed to be Queen Celestia, but Hasbro executives decided against the title of Queen since Disney had started the trend of animated Queens always being villains(excluding Elsa from Frozen). There later was an evil queen in the Season 2 finale (Queen Chrysalis) and possibly to build on that trend, the following season opened with an evil king (King Sombra).
Producer Lauren Faust developed this series with the goal of creating a more sophisticated version of the My Little Pony franchise with more realistic and proactive characters than the usual sexist stereotypes she saw in earlier incarnations. For instance, the insistence on the part of Hasbro executives that clothes and fashion be a part of the characters' interest was addressed by making Rarity obsessed with fashion in the context of being a professional artist and a small business owner with clothes as her preferred medium.
Tabitha St. Germain, Ashleigh Ball, Andrea Libman and Tara Strong are all Canadian.
Although never credited, Lynne Naylor did the final design of Princess Luna/Nightmare Moon.
The show has never shown any male alicorns until Big Macintosh became one temporarily in a dream world. All the female alicorns are Celestia, Luna, Cadance and Twilight.