A while ago back in 2015 somebody made a fan edit of Pocket Monsters Fire Red that runs through all 5 regions through Unova. Further You Tube video of somebody playing it shows that the story continues in the Jhoto region. I've played this edit myself through the 1st 3 Elite 4 fights actually. In this edit are all 6 generation Pokemon. Pokemon Cloud White 2 and 3 are coming. These games are fan edits. Hopefully we'll see the XY region in Cloud White 2 next.