A magical spell cast by Twilight Sparkle causes the "Elements of Harmony" to change, resulting in the "Mane Six" ponies switching cutie marks and destinies. Twilight tries to reverse the spell but discovers there's no counter spell. Instead, she decides to show her friends the value of their original relationships, helping them to rediscover their true selves. As they work together, their cutie marks return to normal, and Twilight realizes the spell was trying to tell her something. She finally understands the true meaning of the spell and, with newfound knowledge, becomes an Alicorn princess, earning her place as Equestria's newest princess.
Here are the key facts extracted from the text:
1. Twilight Sparkle received a special delivery from Princess Celestia with a secret spell.
2. The spell was Star Swirl the Bearded's unfinished masterpiece.
3. Twilight Sparkle cast the spell, but it changed the elements of harmony and altered the cutie marks of her friends.
4. The spell swapped the cutie marks, causing her friends to behave out of character.
5. Fluttershy's cutie mark was swapped with Rainbow Dash's, and she was struggling with her new role.
6. Rarity's cutie mark was swapped with Applejack's, and she was trying to make dresses.
7. Pinkie Pie's cutie mark was swapped with an unknown pony, and she was struggling with her new role.
8. Twilight Sparkle realized that she had to find a way to reverse the spell.
9. She decided to show her friends what they meant to each other, hoping it would help them remember their true selves.
10. Fluttershy's cutie mark was restored after she helped Rainbow Dash with her animals.
11. Applejack's cutie mark was restored after she helped Pinkie Pie with the apple farm.
12. Twilight Sparkle realized that the key to reversing the spell was understanding the true meaning of friendship.
13. She cast a new spell that restored her friends' cutie marks to normal.
14. Princess Celestia appeared and told Twilight Sparkle that she had passed a test and was ready to become a princess.
15. Twilight Sparkle was crowned as the new Princess of Equestria.
16. The coronation ceremony was attended by all of her friends and the people of Ponyville.
17. Twilight Sparkle gave a speech, thanking her friends for teaching her about the true meaning of friendship.
18. The episode ended with a group hug and a celebration of Twilight Sparkle's new role as a princess.