In this special 100th episode, Twilight Sparkle, Fluttershy, Applejack, Rainbow Dash, Pinkie Pie and Rarity battle a monster as the rest of Ponyville rushes to make it to a wedding on time.

When Pip Squeak decides to run for class president, the Cutie Mark Crusaders rally around their friend, but find themselves helping their long-time nemesis, Diamond Tiara, in an unexpected way.

After reminiscing about her Canterlot days, Twilight realizes that she left for Ponyville without really saying goodbye to her old friends, and tries to reconnect and re-open friendships lost.

The Mane 6 are summoned to solve a friendship problem only to find a utopian village where everyone has given up their Cutie Marks.

The Mane 6 have had their Cutie Marks taken and must find a way to get them back. When a deep dark secret is revealed about the pony who took them, they think they may have the answer.

When the mysterious Tantabus escapes Princess Luna’s dreams, the Princess must find a way to stop it before it turns everypony's dreams into nightmares.

An old friend of Applejack’s has become a huge pop star, but Applejack is worried that the singer’s manager does not have her best interests at heart.

Starlight Glimmer casts a time travel spell as a new plot for revenge against Twilight Sparkle.

Twilight Sparkle tracks down Starlight Glimmer in the past and tries to find a way to stop her revenge plot.

After finding out that Fluttershy is taking a new friend to the Grand Galloping Gala instead of him, Discord goes to extreme lengths to show that it doesn't bother him.

Rarity must prove that her friend is innocent when Rainbow Dash is accused of a crime that she did not commit.

When Applejack is called away and has to miss participating in the Sisterhooves Social with Apple Bloom, Big Mac decides to fill in for her.

Rainbow Dash can't accept the fact that Tank must hibernate for the winter and decides that the solution is to stop winter from coming.

Rainbow Dash and Pinkie pie are called by the map to the ancient kingdom of Griffonstone but have conflicting ideas as to what problem they have been called to fix.

Pinkie Pie must try to keep an unintentionally-shared secret involving Princess Cadance and Shining Armor.

Apple Bloom's anxieties about getting her Cutie Mark turn her life into a nightmare from which she may never escape.

Applejack is excited to celebrate Hearthswarming Eve with Pinkie Pie's family but soon discovers that the Pies have very different ways of enjoying the holiday at their Rock Farm.

Determined to overcome her timidity and face her fears, Fluttershy decides to participate in the scary fun of Nightmare Night with her friends.

When her friends find out that Princess Twilight has been avoiding her new castle, they offer to make it feel more like home.

Rarity's dream of owning a boutique in Canterlot finally comes true, but it comes at a price Rarity may not be willing to pay.

An important friendship summit takes a disastrous turn and it's up to Pinkie Pie to save the day.

Applejack and Rarity are called to Manehattan to solve a friendship problem, and find themselves helping Coco Pommel with a major project in her neighborhood. The three soon discover that they've bitten off more than they can chew.

Twilight Sparkle and Fluttershy are called upon by the Cutie Map to settle a bitter family feud.

When notorious outlaw Troubleshoes Clyde returns to menace the Appleoosa rodeo, the Cutie Mark Crusaders realize that bringing him to justice might be the key to finally getting their cutie marks.

When Spike is put in charge of making sure nothing disturbs Princess Twilight, the power soon goes to his head and he begins making decisions in her name.