Alola to New Adventures

"Attention, passengers, this is your captain speaking. We will be arriving in Hau'oli Harbor shortly. Thank you for flying with us today, and we hope you enjoy your visit." 
"Hear that Pikachu, we're only minutes away from a new adventure!" 
"Pika-Pika!" 
On board the sea plane was Ash Ketchum, the legendary trainer from Pallet Town who saved the world more times than he could count. Shortly after his adventures in the Kalos region, his mom had decided to treat him with a vacation in Alola for making it that far. Fortunately, Professor Oak had been kind enough to let them use his vacation home while they were there. 
Joining him was his older brother and Indigo League Champion, Drake Ketchum.
"Don't forget your promise to Oak, Ash. Once we're there, you're to find Professor Kukui and give him that egg as soon as we arrive." 
"Don't worry, mom. I'll make sure that's what I do." 
Of course, Oak had expected something in return for his kindness. He had discovered an unusual Pokemon egg in his ranch, which didn't appear to match any egg from the other six regions.
'I've never seen anything like it before.' Ash recalled him saying. 'And neither have any of the other Professors. Perhaps old Kukui will have some information about it. At the very least it'll give him an opportunity to study egg moves.'
Ash had no problem with fulfilling this task. After all, it was the least he could do for Oak after all he had done for him, up to and including acting as a father figure towards him. At the very least, it would give Ash a chance to see more of the region.
"Attention passengers, this is your captain again. We are now beginning our descent into Hau'oli Harbor. Thank you for choosing Alola Airlines." 
"Look, Ash! Isn't it beautiful?" 
Ash and Pikachu crowded the window. Approaching rapidly was Hau'oli City and with it the Alola Region. Even from there they could see the large buildings and massive structures.
"Whoa! It's beautiful!" 
Pikachu chirped in agreement.
Before long the plane descended into the Marina, and everyone hurried off the plane to begin their vacations. Ash smirked as he leapt off the plane.
"Look out Alola! Future Pokemon Master coming through!" 
"Pika-Pi!" 
"Ash, I'll finish unpacking here. You go drop that egg off at our new neighbor's house." 
"Okay, mom! Come on, Pikachu!" 
"Pika!" 
After dropping their luggage off at their vacation home, Ash and Pikachu made a beeline for Kukui's lab. As coincidence would have it, it wasn't too far from the house, near Ten Carat Hill.
To say Ash was surprised by the lab's appearance would be an understatement. It looked nothing like Oak's ranch, being much smaller in comparison. The woodwork was worn out, the roof looking like it had been replaced numerous times.
"Looks like Kukui needs to do some home improvement, huh Pikachu?" 
"Pika." 
"Well, we have an errand to run. Let's drop this egg off and go exploring." 
Too excited to sit still, Ash knocked on the door rapidly.
"Coming! You don't need to knock so much." 
To Ash's surprise, a young tanned woman with white hair answered the door. Fortunately, he managed to quickly compose himself. 
"Hi, I'm Ash Ketchum from Pallet Town. I have a gift from Professor Oak to Professor Kukui. Would that be you?" 
The woman laughed lightly.
"Sorry, but that's not me. I'm his wife Burnet. You just missed him, I'm afraid. He just went to Iki Town for a meeting with Kahuna Hala." 
"Kahuna?" 
"I would take that egg for you, but I need to catch the ferry back to Akala Island. Iki Town is just north of here, follow Route 1 and you should get there in a few minutes." 
"Thanks, Burnet." 
"Pikachu!"
Burnet waved them off before heading for the Marina.
True to her word, Ash and Pikachu arrived in Iki Town before long. Compared to Hau'oli City, it was absolutely tiny, with only a few small buildings and a small amount of people wandering about.
"Alright, Pikachu. Let's go find the professor! It shouldn't be too hard!" 
"Pika!" 
Unfortunately for Ash, it was. Everyone he asked hadn't seen either Kukui or Hala all day, and before long they checked all over town. Defeated, Ash and Pikachu slumped to the ground at the edge of town.
"Ah, man! We'll never find the professor at this rate." 
"Pikachuuu." 
Right as he was about to give up and go home, Ash caught something out of the corner of his eye.
A blonde-haired woman in white clothes and a large hat was standing at the edge of town, her bag rustling. Glancing around to make sure no one was watching, she hurried off out of town.
"Hey, maybe she knows where Kukui is. Come on, Pikachu!" 
"Pika!"
It wasn't long before Ash found the lady at a nearby bridge, cowering in fear. A horde of Spearow were swooping down, pecking at some creature Ash had never seen before.
"Hey, are you alright?"
The girl turned to Ash, fear showing all over her face.
"Please save Nebby! I only turned around for a second and he's already gotten himself into trouble!"
"Pikachu, Thunderbolt!" 
"Pika-CHUUUUUUUUUUUUUUUUUUUU!"
Large bolts of lightning shot from the rodent's body, hitting the flock of Spearow and drawing their attention to it.
"Great job, Pikachu. You keep them busy while I get Nebby." 
"Pika?"
"Don't worry, I'll be fine."
Before either of them could stop him, Ash dashed onto the bridge, dodging the swooping Spearow before reaching the Pokemon. Before he could scoop him up and turn around, the Spearow came back around pecking at him and forcing him to kneel. Pikachu tried to help from afar, but to no avail.
"Pew! Pew!" 
Without warning, Nebby unleashed a large burst of energy, dispersing the Spearow and destroying the bridge, sending it and Ash falling down to the river below.
"Nebby!"
"Pika!"
"Koko!"
Before anyone could react, a large figure swooped down, picking up Ash and Nebby and returning them safely to the ground. Ash looked up to find a mysterious Pokemon staring him down, nodding before flying off.
"I can't believe it! Tapu Koko just saved you himself! A guardian deity rarely leaves their home."
"Tapu Koko? Guardian Deity?" 
"Pika?"
"Hey, what's that in your hand?"
"Huh?"
Ash opened the palm he didn't know he had closed to find a sparkling stone, shimmering in the bright sunlight.