Alex Heath / Business Insider
There are 151 Pokémon in "Pokémon Go." The game contains the entire first run of Pokémon, which originally debuted in the mid-'90s.
You cannot, however, catch them all. At least not yet.
That original list of 151 includes three "legendary" Pokémon - Articuno, Zapdos, and Moltres - who definitely aren't in the game yet. It also includes Ditto, Mew, and Mewtwo, who definitely aren't in the game yet. And some Pokémon on that list are exclusive to certain territories (Tauros to North America, Mr. Mime to Western Europe, etc).
Here's what we know: The in-game encyclopedia of Pokémon, the Pokédex, increases in size as you discover Pokémon (as seen above).
The in-game list is identical to this official list of Pokémon in the online Pokédex, not just in number, but in order.
One of our staff video producers has a Dragonair (#148). None of us has ever seen a Mr. Mime (#122), but our executive editor has a Tauros (one of the region-specific ones, supposedly tied to North America). No one has found Ditto (#132) anywhere in the world.
All of which is to say: Expect the entire lineup of 151 original Pokémon to be capturable at some point. Currently, it looks like each region tops out at 142. Without further ado, here's every Pokémon you can currently find in "Pokémon Go."