return of the true champion

Ash Ketchum of pallet town is dead. During a battle against the evil team rockets boss Giovanni two attacks collided causing an explosion all that remains of the hero who's decision to save his friends cost him his life is his hat and 2 pokemon he had with him as well as those of his pokemon that were being taken care of by professor oak. in his death the champions of each region have all decided that he will be considered to have been among the best trainers to ever walk the earth put in the hall of fame in Kanto where his father red was once champion... the talking stops as the television is shut off a boy who looks almost exactly like the boy shown in the picture of the hero stands

I'll make things right but first I need to be stronger, I will return the boy thinks.

Ash Ketchum has now been "dead" 3 years there is an all region championship tournament being held in honor of his death what happens when a mysterious figure who says his name is Satoshi shows up with an all to firmilliar greninja, pikachu, and more seemingly familliar pokemon.