So, when are all these coming? We know for sure the Celebi will arrive during a research quest for Pokémon GO Fest in Chicago this upcoming weekend. Smeargle may be part of that quest as well.

It's Halloween in Pokémon GO, and this year's event comes with something ... the mythical Kanto region Pokémon, followed by Celebi from the Johto region. And while those are excellent rewards ...

Pokemon GO players are alerted to an opportunity to ... their journey to completing the Pokemon Gen 2 Pokedex, including ...

On the very outer edge are the Mythical Pokemon that were released at the time: Celebi, Mew, Jirachi, and Deoxys. On top of this, there are the names of other Pokemon that have yet to be revealed.