The Return of The Forgotten

Ash has been away from civilization for a long time. But then he somehow receives an invitation, if he accepts it he's bound to meet up with his past. Will he be able to do that? Disclaimer: I don't own this fanfic, Gerbilftw, https://m.fanfiction.net/u/2100373/ does. It's safe to say though that NEITHER OF US OWN POK...