Pokemon Go: Celebi Special Research Quests Now Available
https://www.gamespot.com/articles/pokemon-go-celebi-special-research-quests-now-avai/1100-6461207/
Pokemon Go players will soon have a chance to add another Mythical Pokemon to their collections. Niantic has announced it is kicking off a new Special Research questline in the game next week, beginning August 20, and those who complete enough of the tasks will be able to encounter the Time Travel Pokemon Celebi. [Update: The Special Research quest to get Celebi is now available in Pokemon Go.]
This isn't the first time Celebi has appeared in Pokemon Go; players who attended the Pokemon Go Fest event in Chicago earlier this summer were able to encounter the Mythical Pokemon by completing an exclusive batch of Special Research tasks, but this marks the first opportunity all players around the world will have a chance to capture it.