The idea i have for this is that some huge catastrophe occurs in the Pokemon world maybe caused by some team rocket type organization although i'm considering some sort of threat from space scenario as that sounds a lot more generally epic i guess. Nonetheless, these events would cause a need for a master trainer to be sent to face whatever the cause of the events would be, just as some sort of last hope for humanity and stuff like that. Upon his failure the whole world would be plunged into a darkness of natural disasters and just bad things leaving people to live in small pockets of civilization among the rubble of the once great cities and in large ships that just perpetually sail around and collect supplies that they then distribute among the various regions. The actual rp parts of this would revolve around new trainers existing in this world that go out into the dangerous world and attempt to do what the master trainer failed to in an attempt to regain what humanity had lost. I dont think i have really fully thought about all the details so any suggestions would be very welcome.