Dew City is a horrible (yet strangely refreshing) post-apocalyptic Earth where the planet's entire water supply has been transformed into Mountain Dew and a gleaming emerald cityscape rises to cover the entire planet. Dew City's origins are unknown, but it appears to be linked the All Spark nearly colliding with a 20oz. bottle of Mountain Dew while floating in orbit of Earth. The Mountain Dew Robots probably have something to dew do with its existence.