The next Day cane Ash wakes up but Lillie still sleeps so he gives a kiss in her forehead and goes down to make breakfast after making breakfast and eating it he goes outside has his Pokémon come to him

Sceptile:Whats up Ash
Ash:Today is tag battle and we are facing

Flash Back
Ash and Gladion go to see who there next Battle is against has they go in they find the other members of the elite four of Alola

Hau:Ash and Gladion
Acerola:Sucks that Hau got put against Alder
Hau:Hey had least I put a fight
Daniel:Well now that your pay back is done the only thing left is winning this thing
Ash:Yeah
Gladion:But be careful you could be put against one of us or a champion

Has they look had the screen they all find everyone
Daniel vs Palmer
Gladion vs Karen
Acerola vs Caitlin
Ash vs Korrina

???:Ash
Ash:Korrina?
Korrina:I won't hold back hit me with your best shot

Ash the smirks and shakes her hand

Ash:You bet I'll bring a strong team

Flash back end

Greninja:Korrina huh well who will you fight with
Ash:Well first Lucario your up
Lucario:Finally my time
Floatzel:Sucks that Maylene's lucario lost I really wanted to fight
Ash:Will visit someday but now Cobalion ready for a fight
Cobalion:Ready

Then Gladion pops up

Gladion:Choosing your Pokémon
Ash:Yeah I'm going with Lucario and Cobalion
Gladion:Fighting types can Fighting types so like you
Lucario:Wait Ash when are we battling Korrina
Ash:We are the last battle
Cobalion:Well has least we can relax first

Later on it's the last fight Ash and Korrina are in the stadium

Korrina:Well Ash it's time for are rematch
Ash:Yeah but Pikachu is not in this one I save a special team for this
Korrina:Is that so then let's begin
Ref:This battle between Ash the Alola region Champion and Korrina the gym leader will now begin Trainers send out your Pokémon
Ash:Lucario and Cobalion I choose you

Korrina:A lucario and the legendary Pokémon Cobalion of Unova this will be awesome now Lucario and Lopunny come out

Ref:Battle begin
Ash/Korrina:Swords dance

All four Pokémon increase there power

Ash:Lucario Extreme speed and Cobalion Quick Attack
Korrina:Lucario ready yourself with Bonerush and Lopunny use mega kick
Ash:Let's put something yes Lucario use bonerush in extreme speed and Cobalion Secret Sword

Both Pokémon summon there weapons and collide with each other the lucario's push each other back and Cobalion matched to land the hit on Lopunny

Korrina mind:Can't forget that Cobalion is a legendary Pokémon so I should not underestimate so there's only one thing to do
Ash mind:I know what's coming next
Korrina:Unlock the power with in and mega evolve

Ash:Mega lucario and Mega Lopunny this will be interesting you know what to do boys Lucario and Cobalion Mega Evolve

Korrina:Incredible Mega Cobalion
Ash:Lest do this Lucario Dragon pulse and Cobalion Flash Cannon
Korrina:Oh no Both of you Aura sphere

The attacks collide and stand there ground but the ones of Ash push thru

Korrina:Dodge it
Ash:Now let's end this Lucario Power up punch then Aura sphere and Cobalion Double kick then use Iron head

Both Pokémon jump towards there opponents Ash's Lucario hits Korrina's Lucario to the ground them shooting the aura sphere defeating it and Cobalion those the same only that he slams harder the Pokémon

Ref:Korrina's Lucario and Lopunny are unable to battle the winner is are champion Ash
Ash:Good work you two
Lucario:He was a strong one but I have more experience
Cobalion:As do I
Korrina:Hey Ash
Ash:Korrina what's up
Korrina:Good battle it looks like me and Lucario need to work harder if we want to beat you
Ash:Then let's battle again just give me a call
Korrina:Right

Has they shake Hands later Ash's Three elite four made it thru there first battle of the Double battle and go to see who there next opponents are Ash looks around and finds that's his battling Olympia

???:Looks like destiny has brought us to battle again Ash
Ash:Olympia it's been awhile and yes it has well I hope you have gotten stronger than last time
Olympia:I have but let's see how you do in battle

Ash returns home and decided to see his Pokémon

Charizard:Did you win
Ash:Yes and are next Battle is against Olympia Greninja your up let's show her what she told us
Greninja:right
Krokodile:And who is the other
Ash:No one
All of them:What!!!
Serperior:Ash what do you mean your only gonna battle with Greninja
Ash:Yes and greninja understands
Greninja:I do and it's the only option
Noivern:We if you say so daddy
Ash:I'm still not used to that even knowing I have like one human daughter and Three two boy and a girl Pokémon who still call me Daddy

The next day cane Ash and Olympia are in the battlefield ready to start

Ref:This battle between Olympia the gym leader and Ash the Alola Champion will now begin trainers send out your Pokémon
Olympia:Meowstic

Ash:I'll show you what you showed me
Olympia:What would that be
Ash:Oh you know Greninja

Ref:Champion Ash is there any other Pokémon
Ash:Nop I'm only gonna battle with Greninja
Ref:Alright Battle begin
Ash:Let's start this right Greninja use Rain dance

Has the sky turns dark and starts raining

Olympia mind:What could you be plaining-Meowstic use Helping hand and Future sight
Ash:Oh no you don't Greninja water shuriken on that Future sight

Has the two shuriken' shut the psychic rocks before they enter the portal

Olympia:Impassive and because of Rain Dance Greninja speed and Power have increased
Ash:Knew you catch on but we are not done right greninja
Greninja:Right
Ash:Stronger and Stronger here we go

Has the giant water so rounds greninja transforming into its Ash-Greninja form

Olympia:There it is the power you two were meant to have
Ash:If it weren't for you to tell us we would have been lost but now we have mastered it and perfected so get ready because the rain is still on and we know how to stop your future sight
Olympia:Indeed then I forfeit

That left everyone even the ref surprised

Ref:Really
Olympia:Yes
Ash:What the
Greninja:Heck is going on
Ref:Gym leader Olympia has Forfeited the match the winner is Ash!!
Olympia:Until we meet again Ash

Has she leaves

Ash:Well that's the first
Pikachu:I would say she may have seen the future and saw something
Greninja:Probably but we may never know

They go back home