My Little Pony: Rainbow Roadtrip (2019)

When Twilight Sparkle and her friends arrive in Hope Hollow, they find the town and all its residents completely devoid of color their dream vacation is starting to feel more like a nightmare. The Mane 6 will have to solve the mystery behind this washed-out world if they hope to bring the 'rainbow' back to the Rainbow Festival and color back to the lives of their new friends.