The Pokémon Company is giving out download codes for rare breeds of three legendaries next month. Signing up for the Trainer Club newsletter will grant access to Articuno, Zapdos and Moltres — each with its hidden ability — starting in May.

Those who aren't subscribed to the Trainer Club, which allows fans to check out the online trading card game, Pokémon Global Link and more, can do so until April 22 to qualify for the promotion. The issue containing the bird Pokémon will be sent to the Trainer Club mailing list sometime in May.

Must Read Check out which mythical Pokémon you can download this month

The download codes will be compatible with each of the Nintendo 3DS games (Pokémon X, Y, Omega Ruby and Alpha Sapphire) and offer versions of the monsters never before obtainable in-game, according to The Pokémon Company.

While Articuno, Zapdos and Moltres can be caught across a variety of Pokémon role-playing games, next month's downloads include their rare hidden abilities. You can see the special birds in action in the trailer above.

In advance of this latest giveaway, the Pokémon streaming website Pokémon TV is broadcasting Pokémon 2000: The Movie, which stars the three legendaries. That film is now free to stream for a limited time.