atlanta
A US city starting with I is Indianapolis, IN.
Saint Petersburg, Russia; Salerno, Italy; San Juan, Puerto Rico; Santiago, Chile; Seoul, South Korea; Seville, Spain; Shanghai, China and Sydney, Australia are cities. They begin with the letter S.
There is no such city anywhere in the world.
You cannot get Oak's Letter anywhere in Canalave City or anywhere else in the game for that matter. Oak's Letter is only available through Nintendo events or via cheating.
No.
Kansas City
Indianapolis
Venice
Gauda
Appleton
Fananas