After you defeat Island Kahuna Olivia, you go to Hano Grand Resort and visit Hano Beach before going in.
Explore the Beach
At Hano Grand Resort, you can go east to Hano Beach, where there is a green sparkle under the first beach umbrella for the Zygarde Cube.
There is a hidden Soda Pop to the right of the upper-left beach umbrella.
There is a hidden Pearl to the left of the Swimmer.
A woman standing on the beach will give you a Soda Pop.
To the left of the woman who gave you the Soda Pop, there is a hidden Pearl.
You can talk to the bellhop in the eastern part of the beach to become a Pyukumuku chucker. Just go up and down the beach looking for Pyukumuku, and check on each one you find. After you get all six, talk to the bellhop to get 20000 Pokédollars.
There is a green sparkle for the Zygarde Cube under the lifeguard tower behind the bellhop.
There is a hidden Pearl behind that lifeguard tower.
To the north, near the Trainer Tips sign, there is a hidden Heart Scale.
North of this, there is another hidden Heart Scale near the northernmost beach umbrella.
In this northern part of the beach, you can walk onto the rustling sand to battle pokémon such as Staryu and Sandgast.
In the southwest water of Hano Beach, you can battle Swimmer Chelsea, who has a level 25 Pyukumuku. You get 600 Pokédollars for winning.
Near Chelsea, there is an Antidote.
Northeast of that, you can battle Swimmer Roddy, who has a level 25 Gyarados. You get 600 Pokédollars for winning.
Near Roddy, there is a Dive Ball.
Northeast of Roddy, you can battle Swimmer Laura. She has a level 24 Finneon and a level 25 Shellder. You get 600 Pokédollars for winning.
Northeast of there, you can battle Swimmer Lawrence. He has a level 24 Wingull and a level 25 Barboach. You get 600 Pokédollars for winning.
On the island north of Lawrence, there are Black Glasses.
North of that island, you can battle Swimmer Alicia. She has a level 25 Psyduck. You get 600 Pokédollars for winning.
North of Alicia, you can battle Swimmer Logan. He has a level 25 Wishiwashi. You get 600 Pokédollars for winning.
To the north, there are splashing water spots. If you get too close, the splashing water will swim toward you, and you battle a pokémon.
North of the splashing water, there is a Pearl String underwater.
Hano Grand Resort
In the hotel, go up and you will meet Faba. He asks if you will go for a tour of Aether Paradise. If you are ready to go, say Yes. But there are some things that you can do in the hotel lobby before you go:
In the hotel, there is a man who will teach moves to Keldeo or Meloetta.
There are a couple of Golfers bothering a Machamp on the left side of the lobby. If you try to stop them, they battle you. They are Golf Buddies Tara and Tina. They have two level 25 Oricorio. You get 3000 Pokédollars for winning.
Afterward, you get TM45 Attract.
In the upper-left part of the lobby, you can battle Veteran Roger. He has a level 27 Trumbeak. You get 2376 Pokédollars for winning.
Afterward, you get a Metronome.
Now, if you are ready to move on, agree to go with Faba to Aether Paradise. Before you go, Professor Kukui asks you to meet him in Malie Garden when you reach Ula'ula Island.
Aether Paradise
In Aether Paradise, Faba will introduce you to Wicke. In the conservation area, you can go to the upper-middle part of the area to find President Lusamine.
After a cutscene, go up to the pokémon to battle it. It can attack with Venoshock. After a few turns, it will run away.
During the next cutscene, Wicke gives you TM29 Psychic.
After a cutscene, you will arrive in Malie City.