After looking for Olivia in Konikoni City, you continue the search in Memorial Hill.
Go Through Memorial Hill
Go east and up a short set of stairs. There is a hidden Heal Powder on the grave to the right of the girl and the Rockruff.
Go east from there and follow the path. When the path splits, go west and you can battle Gentleman Smith. He has a level 24 Jolteon. You get 4800 Pokédollars for winning.
Check the grave near the Gentleman to find a hidden Adrenaline Orb.
South of there, you can battle Preschooler Liam. He has a level 23 Magby and a level 23 Ledian. You get 276 Pokédollars for winning.
East of the Preschooler, you find a Cleanse Tag.
Now go north and check in front of the northwest grave to get a Super Repel.
Farther north, you can battle Madame Sayuri. She has a level 24 Furfrou and a level 24 Comfey. You get 4800 Pokédollars for winning.
West of Sayuri, there is a hidden Revival Herb.
Go through the grass to the west and follow the path to find a Dusk Ball.
To the east of Madame Sayuri, you can battle Punk Girl Melissa. She has a level 24 Ariados. You get 768 Pokédollars for winning.
Go southwest from the Punk Girl to find a Spell Tag in front of a grave.
Go east through the grass to find a path that goes behind some trees. At the end of that path, you find a Hyper Potion.
Go back to the grass, then go south along the path and you find some Aether Foundation people arguing with Team Skull. The Aether Foundation Chief asks you to fight on his behalf.
You battle a Team Skull Grunt that has a level 24 Raticate. You get 768 Pokédollars for winning. The Chief asks you to meet him at Hano Grand Resort after your trial.
Go east from where you battled the Team Skull Grunt, and you will reach Akala Outskirts.