Niantic recently revealed that later this year, a shiny variant of Corsola will debut in Pokemon Go. Shiny variants are rare for any Pokemon, but once Corsola's arrives, it will be one of the rarest in the game. That's because Corsola is one of a small handful of region-locked Pokemon. Unless you live pretty close to the equator, odds are you don't have a Corsola, nor will you have ever even seen one in Pokemon Go.
Corsola will not spawn or hatch from eggs outside of areas like Florida, northern Australia, and other locations that fall on or close to the planet's dividing circumference. Other region-locked Pokemon include Tauros, which can only be found in North America, and Sigilyph, an Egyptian exclusive. However, I think more of Pokemon Go's growing roster should be restricted to appearances in certain parts of the world.
Niantic will often hold events where Pokemon switch regions or drop their exclusivity entirely. Sometimes those switches or changes are permanent. Plusle and Minun, for example. The pair used to be region-locked but can now be found anywhere. Some of the events have Pokemon travel, which makes sense in a world where you imagine they act like the animals that actually fill our world. However, I think Pokemon and real animals should act even more alike in Pokemon Go.
By that, I mean region exclusives should be a much bigger part of Pokemon Go. As touched on above, even though they exist, they are few and far between. Most Pokemon added to Pokemon Go so far can be found just about anywhere as long as you're in the right environment. Yes, some are rarer than others, and although it might sound counter-intuitive to a great Pokemon Go experience, I don't think they're not rare enough.
Take Pokemon Snap, for example. Snap's Lental Region boasts a number of islands with various backdrops and climates. Charmander isn't going to show up on a snowy tundra, nor can a Goldeen be snapped chilling in a volcano. Extreme examples, I know, and I'm certainly not advocating for trainers to have to traverse the side of a volcano in the name of completing their Pokemon Go Pokedex. Please don't do that and leave a trail of blame breadcrumbs back to me, fellow trainers.
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What I'm talking about is more Pokemon that can only be found in certain parts of the world. You wouldn't find a lion in the wild outside of Africa, nor would you see an elephant in your local park if you live in London. Since Pokemon Go is the closest we will ever get to becoming real Pokemon trainers, it should better reflect what it would be like if Pokemon really existed in the real world. The only part I'm not advocating for is kids being sent out into the world to fend for themselves at the age of ten. Wait until you're all grown up to leave your responsibilities behind in your quest to catch every virtual monster.
There are obvious reasons why this isn't a reality and probably never will be, of course. Good reasons that it's hard to blame Niantic for having in place. In fact, it's quite something that there are any region-locked Pokemon in Pokemon Go at all. That a developer is confident enough in its product that it would say, “Yeah, you want this Pokemon? Well, you're going to have to travel to South Korea to get it.”
I think the lack of backlash aimed at certain Pokemon only being found in particular parts of the world is evidence that Niantic might be able to push its luck on this. Lock a few more Pokemon to different places. Split two similar Pokemon and disperse them across opposing halves of the globe. Yes, some trainers will hate it and it will mean most of Pokemon Go's players never have a full Pokedex, but that's the beauty of something that brings being a Pokemon trainer as close to reality as Pokemon Go. Millions of people playing the same game, all having a completely different experience. Everyone finding and catching all the Pokemon is boring. If you want to do that then play a regular Pokemon game. Well, any regular Pokemon game before Sword and Shield.