At the beginning of Pokemon GO's long and storied existence, there were only four Pokemon that were "regional," meaning they could only be caught in certain parts of the world: Farfetch'd, Mr. Mime, Tauros, and Kangaskhan. Since then, the list of regional Pokemon has grown significantly, with dozens of 'mons now exclusive to certain places on the planet. Some Pokemon are locked to tiny, specific areas, while others will spawn anywhere in an entire hemisphere. It can be confusing to keep track of which Pokemon are where and complete the in-game Pokedex.
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Luckily, it's not too hard to find trading partners that have visited or lived in other parts of the world and caught the area's regional Pokemon. It's also worth noting which Pokemon are in an area that you plan to travel to, so you can catch one while you're there. From the north pole to the southern tips of the continents, here are all the Pokemon that are exclusive to certain regions.
There is a handful of Pokemon that are exclusive to one entire half of the planet. Most of them follow an east-west split, while one Pokemon is exclusive to only the Southern Hemisphere.
Split by the Prime Meridian and the 180th meridian, the two hemispheres of the earth are home to Pokemon that match in some way. Shellos and Basculin come in two forms, but the only difference is their appearance. Heatmor and Durant are considered rivals in the series canon, so it's no surprise they like to stay pretty far from one another.
The Southern Hemisphere has one regional Pokemon — Chatot. This Gen IV Pokemon should spawn anywhere south of the equator. Pachirisu could be considered its counterpart, spawning only in the Northern Hemisphere, but it doesn't
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