It's what plenty of fans have been waiting for. Niantic and The Pokémon Company have revealed that after much speculation legendary Pokémon will be arriving in Pokémon GO this weekend. 

The trailer below shows off the recently-implemented Gym features, included Gym badges and Raids, before revealing that a "Legendary Raid" is about to begin. Then, exploding from the eggs, Legendary Pokémon Articuno, Zapdos, Moltres, Lugia & Ho-Oh all take to the skies as trainers attempt to catch the mythical beasts. The video ends with a tease of fan favourite Mewtwo, which is briefly seen at the end of the video. 

Niantic has also posted information about how the Legendaries will work, including where the Pokémon will first appear. Starting 22nd June at the Pokémon GO Festival taking place in Chicago, players will have to work together to defeat the legendary raid boss before having the opportunity to catch said Pokémon. If successful that Pokémon will begin to appear in raid battles across the globe once the festival has finished. It's also worth noting that, once caught, Legendaries cannot be placed in Gyms and can only be used for battling. 

The full details from Niantic can be read below:

As part of our ongoing celebration of Pokémon GO’s one-year anniversary, we’re excited to reveal that Legendary Pokémon are nearly here! Soon, millions of Trainers around the world will be able to discover, battle, and catch these extremely rare and very powerful Pokémon.

As Trainers around the world go out and explore their neighborhoods in search of Pokémon and Raid Battles, they can keep an eye out for unique Legendary Eggs appearing at Gyms. If Trainers and their team are able to successfully defeat a Legendary Raid Boss, they’ll have the opportunity to catch a Legendary Pokémon of their own! While Legendary Pokémon will help them take on the toughest Raid Bosses and Gym Battles, they’re not willing to leave their Trainer’s side, so they can’t be left to defend Gyms.

On July 22, thousands of Trainers in Grant Park for Pokémon GO Fest and the millions of others around the world will be working together to unlock in-game bonuses for the entire Pokémon GO community. If they manage to catch enough Pokémon during the Pokémon GO Fest Challenge Windows, the first Legendary Pokémon will be revealed in Grant Park. If the Trainers in Chicago succeed in defeating the Legendary Pokémon, that Pokémon will start appearing in Raid Battles around the world, after Pokémon GO Fest.

Are you excited for the arrival of Legendary Pokémon? Will you be attending the event held in Chicago? Let us know.