Seaport City

The city connected to Route 17. A Sailor in the north pier will transport you to Polder Town.

Alolan Starters
Given by Parasol Lady in the house far east of the PokéCenter. They include Rowlet, Litten, and Popplio.
 * You can receive a second starter from her after obtaining 7 badges.

"The Rogue Electivire" Mission
If you've completed the first part of this mission (first assigned in Thundercap Mountain), you will be able to find the Electivire and scientist in the basement of the warehouse on the southern pier.

You will battle the Electivire two times: first, normally, and the second Dynamax. The third battle will be with the scientist:

Trainers

 * The following trainers only appear if you've added the "Home for a Hobo" mission (found in Epidimy Town), and spoken with the rich businessman in the the house far east from the PokéCenter

TBD

 * Medium will give something if you show her a super-size Pumpkaboo