After his battle against Y/n Ash now has the chance to battle against professor Kukui

After the battle Nanu grabs the mic and begins to speak.

Nanu:Can I have everyone's attention please?

The people of alola all look at Nanu.

Nanu:After watching this alola league, especially the final battle, I have made a very important decision. To step down as Ula Ula Island kahuna.

The audience, Kahunas, Aether paradise members and pokemon school students all gasp.

Nanu:The guardian of Ula ula island and I have agreed that there is somebody better than me to take on my role. And now I present my successor for Island Kahuna, Y/n!

Flash back

The day fter his battle against Ash, Y/n went to go visit Nanu who asked him to come see him.

Y/n:Kahuna Nanu, why did you ask for me to meet up with you?

Nanu:Well, I want you to become the ula ula island Kahuna.

Y/n:What?!

Nanu:I believe that you would be better than me. Your mastery over your dark type pokemon far surpasses mine. That last battle of the league just proves my point even more.

Tapu bulu appears by Nanu's side.

Nanu:Even Tapu bulu agrees. So would you please take my position as Ula ula island Kahuna?

Y/n begins to think about all the events that has led up to this point. He parents death, leaving his step parents house, meeting team skull, the day he asked Plumeria to be his girlfriend and now all of the battles that he has had during the pokemon league. It has all led up to Nanu asking him to become Ula ula island kahuna.

Y/n:Nanu I accept this offer.

End of the flash back

Team skull as well as the audience all gasp as Y/n enters through the gate with his partner pokemon Hydra flying by his side. He walks up to the stage as tapu bulu appears. He then takes his z ring from Y/n and prepares a ceremonial dance. The z crystal glows green as it lands in his palms.

Y/n:I promise to take this purified z ring and with my dark type squad, become a new kahuna.

His enter team exit their pokeballs as they bow down to Talu bulu, swearing to be the best that they can be for the greater good of Ula Ula Island as the crowd all clap as the new island kahuna is presented. Plumeria exits her seat and runs to her boyfriend as she hugs him.

Plumeria:I am so happy for you Y/n.

Y/n:Well it is all because of you.

Plumeria:Huh, what do you mean?

Y/n:Your kindness and support helped me reach new heights that I never thought I would ever get to. You Always make me feel amazing about myself and I could never think of my life as complete without you by side.

He begins to crouch down on the ground as Plumeria covers her mouth with tears forming up. Y/n hold out a ring.

Y/n:Plumeria will you make me the happiest man in the world and marry me?

Plumeria:Needed no time to state her answer.

Plumeria:Yeah! Yes I will be your wife!

The two of them hug each other and share a kiss as the entire alola region cheer for the newly engaged kahuna and his new fiancé.