My Little Pony: Friendship is Magic

My Little Pony: Friendship is Magic is a Canadian animated series based on Hasbro's popular My Little Pony franchise. The show premiered on October 10, 2010 on Hasbro's The Hub channel, and has currently ended its fourth season. This incarnation of the franchise is referred to as the fourth generation, or G4, of My Little Pony. The show was developed for television by Lauren Faust, who is known for her work on two of Cartoon Network's popular and critically-acclaimed franchises, The Powerpuff Girls and Foster's Home for Imaginary Friends.

The series stars a unicorn pony named Twilight Sparkle, a student of Princess Celestia, the ruler of the magical land of Equestria. The princess gives Twilight the task of learning about friendship and sends her and her assistant, a baby dragon named Spike, to Ponyville. There, they meet some interesting ponies, including action-loving Rainbow Dash, glamorous Rarity, hard-working Applejack, timid Fluttershy, and hyperactive Pinkie Pie. Together, they go on adventures, solve various problems, and learn about the magic of friendship.

The Return of Harmony Part 1 (Season 2, Episode 1)
Princess Celestia tasks the ponies with retrieving the Elements of Harmony and defeating Discord, only for the draconequus to manipulate the ponies with his mind games. Applejack is hypnotized into a liar, Pinkie Pie is hypnotized into a grump, Rarity is hypnotized into being a hoarder, Fluttershy is hypnotized into being a bully and Rainbow Dash is hypnotized into being disloyal. Twilight Sparkle is the only one who does not get hypnotized.

The Return of Harmony Part 1 (Season 2, Episode 1)
Twilight Sparkle falls under Discord's corruption upon failing to defeat him. Unlike the others, she isn't hypnotized.

A Canterlot Wedding - Part 2 (Season 2, Episode 36)
A Canterlot Wedding - Part 2 is the twenty-sixth episode of the second season of My Little Pony Friendship is Magic and the fifty-second episode overall. It is the second episode in a two-part season finale. Shining Armor and Princess Cadance are set to be married, but Queen Chrysalis has a devious plan to ruin Shining Armor's happily ever after and the future of Equestria.

Hearts and Hooves Day (Season 2, Episode 42)
Hearts and Hooves Day is the seventeenth episode of the second season of My Little Pony Friendship is Magic and the forty-third episode overall. The Cutie Mark Crusaders (who are somewhat the antagonists of the episode) create a strong love potion (or love poison, as they later find out), in hopes of making Miss Cheerilee and Big McIntosh each other's "special somepony," but when they discover the serious side effects of the concoction, they quickly regret their actions.

The Crystal Empire (Season 3, Episode 53)
Twilight and Spike are hypnotized by an enchanted door made by the evil King Sombra that makes them deal with their worst fears.

Every Little Thing She Does (Season 6, Episode 138)
In an effort to impress Twilight on her friendship studies, Starlight Glimmer impulsively hypnotizes Twilight's friend in order to do the friendship lessons all at once, but her plan backfires when they are completely stripped of free will to do things on their own without following Starlight's orders, making a hug mess in the castle.

Shadow Play - Part 2 (Season 7, Episode 26)
In a flashback all the ponies are hypnotized by three sirens.

The Beginning of the End (Season 9, Episode 2)
King Sombra, who was revived by Grogar, ends up brainwashing all of the citizens of Ponyville and Canterlot into being his army to take over the latter state and by extension, all of Equestria.