New Japan Only Promo Event
On September 8th, 2019, the prefecture of Hokkaido announced a new event that would be taking place from September 21st to the 29th. The event specifically mentions Vulpix and features images of Vulpix and Alolan Vulpix in mascot form celebrating the bus promotion.
According to the information on the site, 8 Vulpix themed bus tickets will be granted that can be traded in to receive tickets to the "Hokkaido Daisuki Discovery Corps Bus Big Card".
Shiny Alolan Vulpix will likely be available but there has not been any release of regular Vulpix. Check out their Pokemon pages below!