Well no one knows that.
on dewford island. go by boat
in the city after you get of the boat the second time
surf out to the boat goin to dewford an muville yu must hve dive here yu will also get a luxary ball
In the slateport city boat dock place
The second gym is in Dewford Town, accessible by boat after rescuing Peeko.
You'll take the boat and head to the next city.
Use the boat with mr. briney to the left of petalburg to get to dewford. Then, after you deliver the package for the devon people in the cave, you can boat again to slateport.
he is on the top floor of the boat house (wooden building with a boat beside it) south of the museum
In the house west of Petalburg City, before the forest. He is walking circles around a table.
you take the boat, dip****.
Unfortunately, there is no other way than flying, surfing and boat to get to Dewford town. Cheating and hacking does not count.
in castelia city, city with boat to victini