As you can see from the chart, things have changed. Now we have:
● 15% chance the pokémon will be a Pidgey
● 5% chance the pokémon will be a Rattata
● 15% chance the pokémon will be a Zubat
● 5% chance the pokémon will be a Growlithe
● 50% chance the pokémon will be a Goldeen
● 10% chance there will be no pokémon
Now, if we run our simulation with the updated chart, what do you get? I got:
2, 8, 16, 17, 2, 10, 6, 16, 19
This means that the nine pokémon in the space with water are:
As you can see, while on land we had more Pidgeys, Rattatas and Zubats, but Goldeen rains supreme by the ocean. This is because there is a higher chance of Goldeen appearing based on the player's proximity to water. It’s safe to say then, if the player were near a volcano for example the number of Growlithes would increase just like the number of Goldeens increased when the player was near the water. Because of the random number generator, it is possible to find an area that has no pokémon, or even only one kind of pokémon. Though this is unlikely because Niantic is working with 150 different pokémon instead of just five.
Is it possible to catch any pokémon at any location?
I believe so. I know it sounds crazy, but at times I’ve found Goldeens and Goldducks in the middle of downtown L.A. miles away from the water. I think the possibility of a Goldeen showing up though is so miniscule that it will almost never happen. While our example used only 20 slots to choose pokémon from, Niantic’s would be using hundreds of slots resulting in some pokémon appearing less than .001% of the time.
Side note: Imagine you lived in the middle of Kansas with your dog Toto. What if a super rare pokémon to the area, like Venasaur, popped up? You’d race towards that Venasaur. This is the kind of effect they’re creating in players by allowing pokémon to appear anywhere just at an incredibly small probability. Players’ excitement will be rekindled again long after the initial excitement has dwindled because of this rare find. Additionally, they may have done it this way to simulate wandering pokémon who maybe got lost.
So, what factors cause the chart to adjust?
Niantic has come out and said that there are a couple of factors which influence pokémon appearing:
● Location - Geography and location on the planet
● Time of day - different pokémon come out at night than during the day
● Pokémon rarity - how rare is the pokémon?
So, your location at midday might cause you to run into more Pidgeys, but at night the chart readjusts and there may be a higher chance of Growlithes.
Now that you understand the basics of how pokémon are distributed, we’re going to add one additional layer, common, uncommon, rare and legendary. This is actually a third factor, which influences which pokémon appear. Common pokémon, like Pidgeys, will appear in greater numbers than an uncommon pokémon. Uncommon pokémon will appear in greater numbers than rare pokémon and rare pokémon will appear in greater numbers than legendary pokémon. To help you visualize the distribution of these kinds of pokémon, check out this chart: