There are many ways to catch a Pokémon, but for two special weekends in June, there’s only one failsafe way for fans to get one of the most unique characters in the enthralling Pokémon universe on their Nintendo DS.

From June 20-22 and June 27-29, Pokémon players are invited to bring their Nintendo DS systems and Pokémon Diamond or Pokémon Pearl games to the nearest GameStop store where they can receive Deoxys, a legendary character with transformative powers and an impressive set of battle-ready moves.