Region Exclusive: Corsola
As like the Mainstream Pokemon Games where some Pokemon are exclusive to a given Version of a Game, so something similar is found within Pokemon GO. Instead, however, a handful of Pokemon are exclusive to a given region or country in the world. Within the 2nd Generation of Pokemon GO, there are two different Pokemon that are Region Exclusive.
Of these two Pokemon, one of them is Corsola. But unlike most of the 1st Generation Region Exclusive Pokemon, Corsola isn't set to one given country. After the 2nd Generation Update came to Pokemon GO, many experts believed Corsola was exclusive to what was being called the Tropics. However, after more analysis and examination, it has been found that Corsola is exclusive to a given gap in Latitude, from 26S to 31N, in what is now called the Corsola Strip.
Since Trading has yet to be incorporated in Pokemon GO, the only realistic way of obtaining Corsola is by visiting one of these given areas. Sometimes there may be given events that are held which will see certain Region Exclusive Pokemon being found in other areas of across the globe, but said events are unpredictable. It was also once believed that a player could find Region Exclusive Pokemon of other countries in Pokemon Eggs, but that concept has since been deemed impossible.