In "Pokemon GO," you must have at least two legendary Pokemons to be called a Master Trainer. But, unfortunately, catching this legendary Pokemons is not an easy thing to do. Articuno, Zapdos and Moltres are the legendary birds that are rumoured to be included in the game, but the big problem is how to catch them.
According to Mobile & Apps, fans have found out that Articuno, Zapdos and Moltres are included in "Pokemon GO" app files. As a matter of fact, even Ditto Mew and Mewtwo were in the list of assets found in the "Pokemon GO" game file
However, it should be noted that none of these Legendary Pokemons were caught yet because they never appeared anywhere in the map. Niantic, on the other hand, has confirmed that these legendary Pokemons will be found soon in the "Pokemon GO" game, but this may be until a special event is held.
Nick Johnson proved that catching these legendary Pokemons in "Pokemon GO" is very impossible at this point in time. Nick is the first "Pokemon Master" because he managed to catch every single one of the Pokemons in "Pokemon GO," crashing out the 145 list of Pokemons in the Pokedex one after the other. Nick Johnson is still waiting for the appearance of legendary Pokemons like Articuno, Zapdos and Moltres.
Meanwhile, according the University Herald, a "Pokemon GO" player has already found images of six Pokemon creatures and retrieved a McDonald's icon. Sources have claimed that the photos could possibly be used in near future especially with some upcoming events.
The "Pokemon GO" player speculated that it is a hint to a promo with McDonald's to get a legendary Pokemon, as Nintendo News reported. So, for now, "Pokemon GO' players must be prepared for the arrival of the legendary Pokemons. Nobody really knows where and when will Articuno, Zapdos and Moltres may pop up. So, better get ready when the right time comes.