pokemon : legend of chosen one

after becoming alolan champion and defeating world champion Leon ash ketchum got sent on a mission by arceus in this mission ash have to face a new enemies and save the world again but this time he had to be alone without telling his family and friends because arceus told him if he his loved ones into this he might lose them in this story ash will be a 18 yrs old and he will take only few of his Pokemon and that also includes legendary Pokemon and ultra beasts when his friends finds out that ash is gone for a long time they got worried and go set to find him

this will be ash harem story and yes ash will be using mega evolution and z rings

read to know what will happen when they find him