My Little Pony: Friendship Is Magic

Magical Mystery Cure (3x13)

Air date: Feb 16, 2013

Twilight Sparkle accidentally casts a spell that switches the Cutie Marks and destinies of all her friends, and the only way she can reverse the spell is by writing her own magic. Little does she know that by achieving this great accomplishment, she will fulfill her destiny and emerge as a Alicorn Princess.