Niantic Labs 

Niantic Labs via Pokemon Go is offering select Pokemon Go: In-Game/App Items for Free when you apply the listed promo code 5PTHMZ3AZM5QC (must be logged into your account). Includes10x Pokemon Ultra BallsAn ultra-performance ball w/ a higher catch rate than a Great Ball10x Pokemon Max PotionsA spray-type medicine that completely restores all HP of a single Pokemon1x Pokemon Sinnoh StoneA special stone originally found in the Sinnoh region that can make certain species of Pokemon evolve.