Pokemon GO's Season of Alola has featured numerous events so far, many of which have introduced Generation 7 Pokemon to the popular augmented reality mobile game. With fresh Special Research and legendary Pokemon Tapu Bulu having joined Pokemon GO just recently, Niantic has now shone a spotlight on the game's next event. Pokemon GO's Sustainability Week event begins Wednesday, April 20 at 10:00am local time and lasts until Monday, April 25 at 8:00pm local time, and fans will definitely want to participate.