A/N: This takes place after XY(Z) the series, but there are some changes. First off is obvious, he's been aging though his journey. Next, Pikachu never replaced Volt Tackle. And the biggest, is this has nothing to do with Pokémon the Series: Sun & Moon (current pokemon anime). The plot will be based from the games, only Ash & Dawn replace the game protagonist. With that, I hope you enjoy...

Dawn was really bummed that she lost another grand festival. But she tried to push those feelings aside as she headed toward the Alola region. There were no contest or pokestying there, but it was a good place to relax. It was just her, Piplup, and Buneary arriving there, as she saw no need to bring her other pokemon. As they got off on Melemele Island, she went to the pokemon center and her and pokemon got a bite to eat. Suddenly, she saw a girl walk off into a path, looking very uneasy and cautious.
"Piplup! I think that girl is up to something!" Dawn shouted.
But Piplup was fast asleep.
Dawn sighed and thought, "I guess all that traveling tired him out." She looked over at Buneary and saw that she was fast asleep too. Dawn asked Nurse Joy to watch over her pokemon, and then she ran off after that girl.

Ash came to the Alola region when he heard about a different challenge here in Alola. Gym battles are nice, but the news of a different challenge here excited the teen. As always, he just took his trusty Pikachu to start off his new journey, so he can get to know the pokemon here in the Alola region. The kahuna here already knows he's coming and has agreed to let him take a starter of his choosing. Ash arrived to Ikki town and found the spot where he was supposed to meet the kahuna, but he wasn't there.
"…Hey Hala! Are you here?" Ash shouted. But there was no response. Ash scratched the back of his head. "… Man. Now what."

Dawn followed her up a path. Dawn was pretty far away so she wouldn't be noticed, but it kind of looked like her bag was pulling her toward a bridge. A pokemon then popped out of her bag. Dawn found a statue to hind behind when they stopped. The pokemon floated to the middle of the long bridge and happily raised its small arms.
"Wow, I never saw that pokemon before. What was it doing in her bag?" Dawn wondered.
Suddenly, a group of spearow came and attacked it.
"No! Nebby!" the girl shouted. The girl just stared with a horrified look at the scene. She walked toward the bridge, but stopped at the edge.
Dawn came running with her bag in her hand and started whacking the mean spearow. The spearow turned their attacks on Dawn. Dawn tried to continue attacking with her bag, but it was no use. Nebby then started glowing, and a powerful blast knocked the spearow away, but also broke the bridge. Dawn screamed and closed her eyes as they plummeted down toward the low, fast moving river. Though, she then felt herself gently hit the ground. She opened her eyes, and notice that they were in fact on the ground where the girl she followed was. Then she heard a pokemon shout "Kokokokokoko!" Dawn looked around, but the pokemon wasn't around.
"Nebby!" the girl shouted.
Nebby floated towards her.
"Thank goodness! You used your powers again didn't you? Remember, you couldn't move for ages afterwards!" Tears started to foam in her eyes. "I don't ever want to see you like that…"
Nebby responded with a quiet, "pew…"
"…No, I'm sorry Nebby. I shouldn't say that. You were just trying to save me that time…" She started crying. "And I couldn't even do anything in return."
Nebby looked at Dawn and shouted, "pew!"
"Huh?" Dawn responded.
Lillie whipped the tears away from her face. "I think, Nebby is saying thank you. And I thank you too, for saving Nebby."
Dawn smiled. "No problem." At first, Dawn thought this girl could've been a pokemon thief like Team Rocket. But she seems to really care for Nebby, so she couldn't really be a bad person. "My name is Dawn by the way! What's your name?"
The girl just shook her head. "If you don't mind, can you please walk me back to town? I'm afraid of getting attacked again."
Dawn gave her a confused look. "…Okay."
"And also… Please don't tell anyone about Nebby, okay?"
"…Alright."
The girl told Nebby to get into the bag, and once it went in, the left.

Dawn walked with this mysterious girl back down towards the town, and noticed Ash.
"Ash!" Dawn shouted. Then she ran towards him.
"Dawn!" Ash shouted.
They stopped right in front of each other.
"What are you doing here?" Dawn asked.
"I'm here to take the island challenge here in Alola!" Ash responded. "What are you doing here?"
"I'm just here for a little break. Though if you're here, I'd like to tag along with you, if that's okay."
"Of course it is!" Ash groaned. "But… all we are doing now is waiting for a guy named Hala."
"Well, I don't mind hanging with you till he gets here!"
"Great! It'd be much better waiting with someone than waiting alone!"
Pikachu gave Ash an unamused look to Ash.
"Of course, there's never a dull moment with you, Pikachu…"
Pikachu left Ash's shoulder and went to nuzzle Dawn.
"Aww Pikachu! I'm glad to see you too!" Dawn said.
Then ash noticed the girl who Dawn was traveling with. "Hey Dawn, who is that?"
"I don't know. I met with her up in that path, but she won't tell me her name."
"Woah. How weird."
Then a guy ran up to the girl and shouted, "hey Lillie! There you are!"
Lillie frowned at him. "Kukui… I'm sorry for worrying you."
"It's no problem at all!" Kukui then turned to Ash. "So you must be Ash! I wanted to meet you at the ferry, but you seemed to have made it here alright!"
Ash gave out a nervous laugh as he remembered how lost he was when he got here. "Yeah…"
Then an older guy appeared.
People started talking excitingly. "Look! Kahuna Hala has retuned!"
"Hala! Finally, I get to meet you!" Ash shouted.
Hala laughed. "Yes! I'm glad you're okay, boy! When I've heard you arrived, I waited here. But hours passed, and you never showed up!"
Ash gave out a nervous laugh. "Well, I was just so excited to see Alola, that I kinda ran off and got a bit lost."
"Ah. So, that's why I missed you!" Kukui said.
"Typical Ash…" Dawn remarked.
"…Well, before I could go and get a search team for you, something came up. And as the island's kahuna, I had to take care of it!" Hala said.
"I see. Well, if everything's fine now, I'm ready for my pokemon!" Ash shouted.
"Just a moment…" He turned to Lillie. "I saw Tapu Koko flying about. Lillie, do you possibly know what was going on?"
Lillie looked toward Ash with an uneasy look. She looked toward her bag. "Nebby… and Dawn…" she looked towards Dawn. "ran into trouble, as the bridge broke. But then Tapu Koko saved them!"
"So… That's what happened. But what's a Tapu Koko?" Dawn wondered.
"Woah! Even though Tapu Koko is our guardian, he's a fickle creature. Yet he was moved to save you! I think we shall celebrate by letting you chose your own pokemon!" Hala said.
"Hey! What about me!" Ash shouted.
Hala laughed. "Of course, you can choose one too!" Hala let out the Pokemon they can choose from. Which was between a Litten, Rowlet, and Popplio.
"Wow! They all look so cute!" Ash shouted.
"Hey Ash! I know this is important for you, so you should choose first!" Dawn said.
"Alright! Thanks Dawn!" But then he frowned. "But who should I choose?"
The Litten looked away from them with an uninterested look, while Popplio played around with a rock. But the Rowlet flew to Ash, and hooted to him.
"Hey! Would you like to help me out on my adventure?"
It happily hooted.
Hala laughed. "Well! I never expected that a trainer would let a pokemon choose him! I think you'd fit here in Alola just fine, Ash!"
"Wow! You really think so?"
"Totally! Well Dawn. What starter would you like?"
Dawn looked between the Litten and Popplio. She wasn't really sure which to choose.
The Rowlet then went to Pikachu, and happily greeted him, and Pikachu happily greeted back.
The Litten looked at the Rowlett. While Popplio and her never paid much mind to each other, the rowlet got her to open up and Litten enjoyed playing with him. Dawn looked at the Litten, reminded of the glameow her mom and Zoey own, she then wanted to have a Litten.
"I would like to have Litten, sir!" Dawn said.
Hala laughed. "Well, okay! But now the true test comes in!"
"What?"
"Here in Alola, the pokemon must also choose its trainer. It is then that you can truly call it your partner!"
"I see…" Dawn looked over at Litten.
Lille knows how littens can be. She believed that there was no chance that Litten would come to Dawn. She looked at her with a frown. Dawn was so nice to her, and she doesn't want it to refuse her.
"Hey Litten… How would you like to travel with me? I got loads of friends for you to meet, and I'm sure we'll have lots of fun together!"
Litten looked away with an unamused look.
"And we'll also have Ash and his pokemon to travel around with too!"
The litten looked at Dawn with a surprised look and let out a "Mewrr!"
"…So, what do you say?"
The litten ran up to her, and gave her a smile while wagging her tail.
Lillie's mouth opened wide as her shock of what she saw.
Dawn picked her up, much to Litten's displeasure. "Alright! I got Litten!"
"Alright! Congratulations you two!" Kukui said.
They both told him thanks.
"And here, you can have these too!" He gave Dawn and Ash pokedexs. "These Pokedexs are updated for Alola pokemon! And the pokemon you got are already registered in them!"
"Awesome! Thanks Kukui!" Ash said.
"No problem! Well, it's getting late. I need to start hitting the hay!" He turned to Lillie. "Let's start heading back."
Lillie nodded.
"Right. I shall be taking my leave too. Good luck on your adventure!" Hala said.
"Right. And thanks so much for all what you did!"
"Don't mention it, boy! Well, see you around!"
"Bye!"
Once they all left, Dawn and Ash went to the pokecenter.

Dawn's Piplup happily cheered when he saw Dawn and Ash.
"I'm glad to see you too, Piplup!" Dawn said.
"So Dawn… Whose this Nebby Lillie talked about?" Ash asked.
Dawn gave a nervous look, remembering Lillie didn't want her to tell anyone about Nebby.
Piplup looked up and gave a curious look, also interested in hearing about Nebby.
"W-well, it's… her little brother!" Dawn shouted.
"Reallly…" Ash then gave a confused look. "But then… why wasn't he with you when you two returned?"
"T-that's cuz… they had a fight, and ran angrily off!"
"Oh no! Well, maybe we should go out and look for him tomorrow!"
Dawn looked away with a frown. "I-I'm sure Lillie can find him on her own…"
"But, we look together we can find him sooner! And the sooner the better!"
Dawn fiddled her hands. "True, but… she told me she rather find him herself."
"I say we help her look anyway!"
Dawn looked at him with a frown. If this was a true story, she'd defiantly agree with him. His determination to help those in need is what Dawn really admired about him, regardless if she really wished that he'd just agree to let Lillie handle it.
"But, tomorrow would be better. So let's get to bed, so we can help out bright and early tomorrow!" Ash and Pikachu ran to their room.
Dawn sighed and wondered what she was going to do to get out of this.