My version of Alola league

by Aerozard

As Ash is about to compete in the Alola League he gets word from Professor Oak that Greninja, Pidgeot, squirtle,and Primeape have all returned. This along with the Alola league hosting 8,192 contestants and needing to be brought down to 1,024. Also Ash’s old rivals return. So for months Ash trains with his all his Pokémon. Will it pay off?

This will be my version. After Greninja, Pidgeot, and Primeape return to Oak's lab Ash decides to use his older Pokémon along with Ash's old rivals returning.