Mahalo Trial

Walkthrough: The first area that can be can described in Pokemon Sun is the Mahalo Trial. Before you even obtain your Starter Pokemon and are allowed to go into Wild Grass and Battle other trainers, you must search for the Kahuna of Melemele Island in this area. You never do find the Kahuna here, but instead find and meet Lillie, Professor Kukui's Assistance, and her Cosmog, nicknamed Nebby. Nebby quickly gets attacked by a pack of wild Spearow and you must save it, with the end result of both of you being saved by the Legendary Island Guardian Tapu Koko.

Wild Pokemon: There are no wild Pokemon that can be found on the Mahalo Trial, not even later in the game when the bridge has been repaired.

Trainers: There are never any trainers to Battle here.

Zygarde Cells: There are also no Zygarde Cells found later in the game in this area.

Items:

Sparkling Stone - Given to you by Lillie after saving Cosmog, but said to be left by Tapu Koko himself for you. Later turned into your Z-Ring.

Electric Seed - Found later in the game on the opposite side of the the bridge to the right.