The Mythical Pokémon Darkrai was distributed at GameStop stores in North America earlier in the year, and, for those that had missed their chance, it returns with a special code distribution.
Those with Pokémon Omega Ruby, Pokémon Alpha Sapphire, Pokémon X, or Pokémon Y can enter the code Darkrai20 to receive the same Pokémon that was given out at GameStop. That means that if you have received it previously, you won’t be able to get another.
The Pitch-Black Pokémon was first seen in Pokémon Diamond and Pokémon Pearl, and it is said that the Mythical Pokémon chases away people and Pokémon alike by making them experience nightmarish dreams.
Darkrai will be Level 100 with the ability Bad Dreams, which reduces the HP of an opponent’s sleeping Pokémon. The Dark-type Mythical Pokémon will have the moves Dark Void, Ominous Wind, Nightmare and Feint Attack.
This code is valid until 31st October 2016, so make sure that you enter it by then.