https://www.gamespot.com/articles/pokemon-go-may-2018-community-day-exclusive-chariz/1100-6458920/

Pokemon Go's next real-world event is right around the corner. Niantic is hosting May's Community Day this weekend, and ahead of the event, the developer has finally revealed which exclusive move players will be able to get this time.

May's Community Day takes place this Saturday, May 19, and features the popular Red and Blue starter Pokemon Charmander. For the duration of the event, Charmander will spawn much more frequently than usual, and if players manage to evolve it into its final form, Charizard, it will learn the powerful Fire-type attack Blast Burn.