GameStop locations across the United States have started distributing codes for Palkia and Dialga, as part of the Year of Legendary Pokemon celebrations.
The codes will be distributed between February 2 to February 28, 2018. No purchase necessary. You’ll get Palkia if you own Pokemon Ultra Sun/Sun and Dialga if you own Pokemon Ultra Moon/Moon. Codes expire on May 23, 2018.
Check out the full list of upcoming Legendary Pokemon distributions.