Since most Pokemon Go players play in cities, they are more likely to encounter “urban” Pokemon such as rats, birds, and worms. The time of day also has an impact on the “occurrence” of pokémon. For example, you will often see bats at night.
However, there’s no denying that some Pokémon are rarer than others, and some are almost impossible to find. Players have even created a special rating of the rarity of Pokémon, which we are happy to share with you.
Ubiquitous
Ordinary
Unusual Pokémon
Rare Pokémon
Very rare
Unique Pokémon
Epic Pokémon
Legendary
You can also save the pokémon ranking summary table to your computer (Right mouse button – Save Image).