My Little Pony: Rainbow Roadtrip (2019) on Netflix

Plot summary

An invitation reaches Rainbow Dash: Hope Hollow wants her as guest of honor at its Rainbow Festival. She and her friends travel there by hot air balloon. Petunia Petals, who runs the hotel, gives them rooms. The next morning the town and its residents have no color. Mayor Sunny Skies tells them apathy has taken hold. His grandfather began the Festival and constructed a Rainbow Generator meant to fill the sky with color; after Sunny took office, the machine failed and the color drained away. Twilight Sparkle and her friends offer their help.