Wilson, Brewster, and Koko's Adventures of My Little Pony: Friendship is Magic - The Magic of Friendship is the first upcoming Chuggington/MLP Crossover film to be created by Stuingtion.
Twilight Sparkle learns that the evil Nightmare Moon will return during the upcoming Summer Sun Celebration after one thousand years of imprisonment in the moon. She tries to warn her mentor Princess Celestia, but the princess ignores her and sends her to Ponyville to check on the preparations for the celebration. There Twilight reluctantly meets Applejack, Rainbow Dash, Rarity, Fluttershy, and Pinkie Pie for the first time. At the celebration, Nightmare Moon appears in place of a missing Princess Celestia and decrees everlasting night. After Nightmare Moon decrees eternal night, Twilight Sparkle, with the addition of her new friends, ventures deep into the Everfree Forest to find the Elements of Harmony, a set of artifacts used to defeat Nightmare Moon in the past. Nightmare Moon creates obstacles to stop the six ponies, but each of Twilight's friends helps the group overcome them using their own strengths. Once they find the Elements, Nightmare Moon appears and shatters them. Twilight realizes that she and her new friends embody the Elements of Harmony—Honesty (Applejack), Kindness (Fluttershy), Laughter (Pinkie Pie), Generosity (Rarity), Loyalty (Rainbow Dash), and Magic (Twilight Sparkle)—and the six wield them to defeat Nightmare Moon, returning her to her original form as Princess Celestia's younger sister Princess Luna. Princess Celestia returns and forgives Luna, and orders Twilight to remain in Ponyville to continue studying the magic of friendship.