After completing the challenge in the Trainers' School, you explore Hau'oli City.
Hau'oli City Beachfront
When you enter the Beachfront, a girl shows you how to do the Alola greeting. Go farther north and talk to the woman on the right to get a Potion.
Go down the first set of stairs to the beach, and get the Poké Ball that is south of those stairs.
Hau'oli City Shopping District
When you go farther north up the road, you reach Hau'oli City Shopping District. Go north and Hau will meet you and take you into the nearby Tourist Bureau, where you get a Poké Finder for your Rotom Dex. While you are here, you can talk to the woman on the left side of the counter to play the Loto ID. She will draw a random number, and if some of the numbers match the original trainer IDs of any of your pokémon, you win a prize.
Talk to the guy in the bottom-left corner of the room. If you have caught ten different species of pokémon, he gives you 10 Ultra Balls. If you haven't caught that many yet, just come back and talk to him later.
Go outside to meet up with Hau and Lillie again. Rotom will fly off and take a photo. Afterward, the guy nearby will tell you that the broken wall is a photo spot. Go up to the crack in the wall and press R or tap Rotom to activate the Poké Finder. Take at least one picture of the pokémon. Try to take the picture when the pokémon is facing the camera, and zoom in to make the pokémon as big as possible in the picture. Then choose the photo that seems best. You will upload it and get comments on it. After that, you should use the Poké Finder again and take up to six photos, and choose one. After you earn a total of 1500 points, your Poké Finder will be upgraded to Version 2, which allows you to zoom in. Taking a picture of a pokémon will add it to your pokédex as seen.
When you go farther up the street, you will find Lillie outside the apparel shop. She will give you a Lens Case, and if your character is female, a Makeup Bag. After Lillie departs, talk to the woman outside of the shop to get a Silk Scarf.
If you go into the apparel store, you can talk to the woman behind the counter to buy new clothes. You can go into the changing room on the left side of the store to change clothes, eye color, and for female characters, lip color.
Next door, there is a hair salon. You can change your hair style, hair color, or both. Your photo in your passport will automatically be updated with your new hairstyle.
The shopping mall up ahead is closed for renovation, but you can go across the street and through the red gate to find a Tiny Mushroom in the corner of the area.
Past the closed shopping mall, a Pokémon Center is on the right. As you approach it, Captain Ilima will talk to you. He explains that he has been putting up Totem Stickers to help trainers on their Island Trial. But he has also seen Team Skull in the area, trying to interfere. Be sure to check on the stickers to collect them. There is one between the Apparel Shop and the Hair Salon.
Talk to the guy outside of the Pokémon Center to get a Heal Ball.
Inside of the Pokémon Center, talk to the woman on the left and she will ask you to add an Abra to your Pokédex and show it to her, and she will pay you if you do. She says that you can find Abra in the grass around Hau'oli City.
In this Pokémon Center, there is an old man who is a Move Deleter. Talk to him if you want your pokémon to forget any moves.
If you go through the red gate across from the Pokémon Center and go through all the grass, you will find a Revive next to the palm tree.
Go past the Pokémon Center and turn left. There are some people talking to each other. If you go to the left from those people, you will find Ilima's house. Talk to the woman in the kitchen to get a Lumiose Galette.
Outside, if you go north in the yard of Ilima's house, you find a pool, and north of that you will find an Ether.
If you go down the street facing Ilima's house, you will find Hau'oli City Hall. Talk to the person on a couch to get a Revive.
You can come back to City Hall later to battle Gentleman Reginald. He has a level 14 Dunsparce. You get 2800 Pokédollars for winning. Reginald gives you a Nugget after the battle.
Go back to the street and continue following it. You will find Hau outside of the Malasada shop. But some Team Skull Grunts harass you. Talk to one of the Grunts to battle him. The Grunt that you battle has a level 9 Zubat. You get 288 Pokédollars for winning.
Afterward, Ilima will heal your pokémon. Then he challenges you to a battle. Say Yes if you are ready to battle Ilima. Captain Ilima has a level 10 Yungoos and a level 11 Smeargle. You get 1320 Pokédollars for winning.
You can go into the shop and buy Big Malasadas from the girl on the right for 350 Pokédollars. You can take Big Malasadas with you to feed to your pokémon later. You can also buy smaller malasadas from the girl on the left for 200 Pokédollars. These malasadas can be different flavors, such as Sweet, Spicy, and Sour. When you buy one, you have to choose a pokémon to feed it to, and your pokémon will eat it in the store.
Outside, if you go past the Malasada shop, you find the Alola Photo Club, but it's not open yet. Across from that building, there is a red gate. Go through the gate and go through the grass to find TM49 Echoed Voice.
Go past the police station and go down the road to reach the Marina.
Hau'oli City Marina
At the Marina, there is a lowered area on the east side. Go down this area and you will find a Super Potion at the end. There is a Totem Sticker near where the Super Potion was.
Talk to the girl outside of the Ferry Terminal to get an X Defense. Talk to the guy next to her to get an X Attack. There is a Totem Sticker on the wall near these people.
When you are ready to move on, go up the street next to the Pokémon Center. Lillie will talk to you. Go farther north and talk to Kahuna Hala. Go up and check on Tauros. Choose "Grab it by the horns". Then after Hala and Tauros leave, go north to reach Route 2.