The Day has come Ash is in the tunnel waiting for the doors to be open

Ash:Well buddy is time let's do this sucks that Gladion did not make it
Pikachu:Yeah so who are you planning on using

Has he whispered the name

Ash:I think it's time to show the world the light of Alola
Pikachu:Sucks that I could not fight
Ash:Well first you should know that your literally my third strongest Pokémon on my team and that's because we literally did a battle royal and all of you were in there full power and also I may not use you in this one but I'm using you in every other battle and the next tournament Champion
Pikachu:Yes
Ash:But first let's win this
Pikachu:Right

Has the door opens Ash see his opponent Diantha Champion of Kalos has he looks around he see Nanu has the ref

Ash:Nanu
Nanu:Hey kiddo almost to top I see
Ash:Yeah but anything could happen
Nanu:Just don't make this boring
Ash:Don't worry I won't I already know who I'm gonna use
Nanu:Really well good luck champ

Has he goes back to his spot

Diantha:Ash let us have a wonderful battle
Ash:Right but just gonna say it now I'm not gonna go easy
Diantha:That just how I want it
Ash:Then let us start
Nanu:Alright the Battle between Champion of Alola Ash and Champion of Kalos Diantha will now begin this will be a 3 on 3 battle so trainers send out your Pokémon
Diantha:Alright then Gourgeist

Ash:Finally I get to see another of her Pokémon and not just Gardevoir but now it's time
Diantha mind:What Pokémon could he be plaining to use
Ash:Come out Finder of Alola and Light that shines like the Sun the most powerful Ultra beast I choose you  Necrozma!!!!!!!!

Diantha:Who is that
Ash:This is Necrozma the founder of Alola and one of the ultra beast that I captured he is my second strongest Pokémon I'm this close to the finals and I'm not gonna stop because I don't give up until it's over now let's do this Diantha
Diantha:Right
Nanu mind:Damm his not kidding his going almost all out here let's just hope he doesn't use it's full power actually scratched that his definitely gonna use that move-Necrozma vs Gourgeist battle begin
Diantha:Gourgeist use Dark pulse
Ash:Dragon pulse

Both attacks make contact but the dragon pulse just pushes thru and reaches Gourgeist defeating it

Nanu:Gourgeist is unable to battle Diantha send out your next Pokémon
Diantha mind:He wasn't kidding that Pokémon took down Gourgeist in one shoot and being a dragon type the only Pokémon I got to beat it are Aurorus and Gardevoir but first let's freeze it-Aurorus

Nanu:Aurorus vs Necrozma battle begin
Diantha:Now aurorus use Ice beam
Ash:Dodge it and use Stone edge

Has he dodge the ice beam he uses stone edge

Diantha:Block it with Aurora Veil
Ash:Now break thru with Outrage

Has the stone edge was block by the Aurora Vail Necrozma comes to Aurorus but the shield was still holding but cracked

Diantha:We survive barely
Ash:That Aura Vail is Stroger than Daniels Ninetailes but that still won't stop us Necrozma use Rock Blast
Diantha:Aurorus Ice shard

Both attacks collide with each other but then necrozma starts coming towards Aurorus

Ash:Now use Metal claw
Diantha:Aurora Veil

The Aurora veil was destroyed by the claw and the other claw hit Aurorus sending her back but she is now weak  

Ash:Now let's see if disadvantage works here Necrozma use Dragon pulse
Diantha:Use every power you have left Aurorus and Use Aurora beam

Both attacks are in a stand still has The dragon pulse just pushes thru and hits Aurorus

Nanu:Aurorus is unable to battle Diantha send out your last Pokémon
Diantha:It's all up to you Gardevoir

Ash:Finally I would recommend you go mega but that's your decision
Diantha:Considering the the tight spot that we are we have no choice Gadevoir mega evolve

Nanu:Gardevoir vs Necrozma battle begin
Ash:Necrozma use Draco meteor
Diantha:Gardevoir protect

Like a 100 orange ball fall from the sky hitting everything in the stadium has Gardevoir holds on and still keeps the Shield on has the attack end there was only smoke blocking Gardevoir vision

Diantha:Gardevoir focus your energy on finding Necrozma ones you do use Moon blast

Has she focuses her energy to detect him but then a a claw cane out of nowhere Gardevoir move back and blasted her moon blast but necrozma just tosses it aside to the wall has the dust settle everyone gets to see necrozma but in mega

Diantha:WOW Ash this power your a very lucky man
Ash:I wouldn't call it luck more like destiny but now I gonna end this
Diantha:Thinking you can end this in one shot are we getting overconfident
Ash:Not overconfident just Happy Necrozma lets do this

Has he does the Necrozma z-move

Ash:Light that Burns the Sky!!!!!!!!!!!!!
Diantha:Gardevoir full power Shadow ball

Both balls become big but Necrozma's is bigger

Ash:End this!!

Has he fires the giant green ball that leaves a giant explosion leaving a wave of wind has the dust settles Gardevoir was fond on the floor defeated

Nanu mind:Called it-Gardevoir is unable to battle the winner and moving on to the Final round is Champion Ash
Diantha:Well has least we made it far

Has she see Ash patting necrozma to then returning him he goes towards him

Ash:Well sorry we couldn't do and actually battle but a knew you were strong so I decided to go strong
Diantha:Well it was a good battle but for next time we battle least battle with regular Pokémon
Ash:Define regular Because all my Pokémon can mega and that includes Pikachu

Has they leave the stadium Ash gets hug by his two angels Lillie and Lara

Lara:Yay daddy is in the finals
Lillie:Your almost had your dream
Ash:Thank you my angels now let's go home
Lara/Lillie:Okay
Ash:See ya Diantha

Has he leaves they leave a almost jealous Diantha seen it seems she had feelings for Ash.The next Day Ash is in the door of the tunnel ones again

Pikachu:Something wrong buddy
Ash:No just happy that we finally made it to the end of this nightmare with this win I'm not gonna be haunted by those assholes I will be free of the suffering and free of the death of Bayleef
Pikachu:She may have been a traitor but she was a good friend and sister
Ash:Yeah if only I would have understood her feelings for me she may have not done what she did
Pikachu:Come in don't blame yourself for her death now let's focus on the battle remember who you are using
Ash:Yeah do you think this is overkill
Pikachu:For trainer like Cynthia maybe 49% overkill

The doors open and he goes thru seeing his opponent champion of Sinnoh Cynthia and Kiewai has the ref

Ash:Kiewai
Kiewai:Hey Ash ready for your last battle
Ash:Yes and I'm aiming to win

Has he goes back to his spot

Cynthia:It's time Ash show me how much you have grown
Ash:Oh Cynthia what I'm gonna do is the most amazing thing I have ever done
Kiewai:The battle between Ash the Champion of Alola and Cynthia the champion of Sinnoh will now begin Trainers send out your Pokémon
Cynthia:Togekiss

Ash:Now show them why you are the God of Pokémon I choose you Arceus!!

Cynthia:Your kidding me that he is actually gonna use that
Arceus:So it's finally my turn
Ash:I save the strongest for the end
Kiewai mind:He always surprises me with this tactics-Togekiss vs Arceus the god of Pokémon battle begin
Cynthia:Well this will be an honor and a challenge now togekiss use Aura sphere
Ash:Judgment Dragon pulse

Both attacks collide but the dragon pulse just moves towards its target and defeats togekiss.Ash only using Arceus defeated Cynthia 5 Pokémon

Kiewai:Lucario is unable to battle Cynthia send out your last Pokémon
Cynthia mind:Ash's was not joking off his really aiming to win well even if I do Arceus if it's possible it's all up to her-Garchomp let's go

Ash:I'm just gonna say it now attract does not work on Arceus I tried with Serperior in her mega form and it still not work just letting you know
Cynthia:Well that changes a little of what I was doing first but still I'm not gonna give up Garchomp mega evolve

Ash:Good my turn
Cynthia:Nani!?
Ash:Arceus Mega Evolve

Kiewai:Garchomp vs Arceus battle begin
Cynthia:Now this got even more serious Garchomp use Dragon rush
Ash:Judgment Dazzling Gleam
Cynthia:What

Both attacks collide with each other but Garchomp was the won thrown back

(before I do this last attack the next attack is my creation and don't judge)

Ash:Let's end this nightmare Arceus ready
Arceus:Yes
Cynthia mind:His preparing for one final attack-Garchomp start charging up Dragon pulse
Ash:Now it's time use True Judgement

Has the ring in the middle part of Arceus crystal start glowing both Pokémon charge there attacks and ready themselves for the final blast

Cynthia:Fire now
Ash:That won't be enough go full power

Both Blast were shoot the dragon pulse hold but the true judgment just pushed thru after making and explosion in front of Garchomp has arceus uses guts to blow away the smoke we find Garchomp defeated

Kiewai:Garchomp is unable to battle the winner is and are Pokémon Master Ash Ketchum champion of Alola!!!!!!!!!
Ash:Yes Arceus we did it
Arceus:Was there any doubt
Pikachu:Heck no

After that Ash was named the first Pokémon Master and the strongest Trainers He was a Trainer,Champion,Pokemon Master,Rival,Friend,Son,Student but most importantly a Husband and a father

The End