My Little Pony: Equestria Girls - Forgotten Friendship

A colorful, heartfelt family adventure about friendship and redemption, where a character must prove her worth to friends who've forgotten her.

The story follows Sunset Shimmer, who (using her powers) finds out that her friends' memories of her have been mysteriously erased, resulting in them getting amnesia. Determined to set things straight, she'll need Princess Twilight's help from Equestria in order to find out the source of what caused her friends' memory loss.