Hello,
I've started playing this game for about 2 weeks. I understand that the game utilizes a spawn system using discrete levels of rarity (tiers) from 1-9. I usually refer to the PRO wiki spawn data for catching purposes, however, I'm wondering what are the probability formulas with respect to these rarity tiers?
With that, anyone should be able to calculate the encounter probability of any given Pokemon on any given map, not just a qualitatively descriptive "tier". I understand that there is some kind of weighting algorithm in there, meaning the spawn rate for a certain Pokemon on a certain map is not only determined by its own rarity tier, but also those of other Pokemons spawning there.
I'm sure there is a formula, since the game relies on an algorithm to perform spawning, and I hope it is not a secret. I searched through the forum and haven't found much related discussion, and with such a big player population that seems a bit weird.