Mountain Dew Cheetos have arrived and nothing will ever be the same again. The latest limited-edition snack come from Frito Lay Japan, the same people who brought us Pepsi-Flavored Cheetos coated in a sweet cola flavor. According to BrandEating, this isn't the first time a Mountain Dew-flavored item has found its way onto shelves -- back in 2008, they released a mystery Doritos flavor known as "Quest" that appeared here in the US.