VIDEO : Mysterious Ultra Bonus Reward For Pokemon Go Remains A Mystery

According to ComicBook.com, Pokemon Go is set to announce the reward for players that complete all three Global Challenges on September 10th. The secretive "Ultra Bonus" reward was announced at the beginning of the summer as part of Pokemon Go's worldwide tour of live events. For each Global Challenge completed, players received in-game bonuses. Pokemon Go has kept the Ultra Bonus a mystery, but many trainers speculate the app will somehow add the Mythical Pokemon Deoxys to the game or possibly Ultra Bonus could unlock a "Mewtwo Day" event. Pokemon Go's final Global Challenge will start on September 1st and run through September 2nd.