You can now filter by Legendary Pokémon in Pokémon GO

Pokémon GO players who make use of the mobile game’s filtering options will be happy to know that they can now filter by Legendary Pokémon, as well as by defender. To see how this looks with three successfully-caught Moltres and an Articuno, check out the Pokémon GO screenshot above. Legendary Pokémon that have made official appearances via Pokémon GO also include Zapdos, Lugia, Raikou, Entei, Suicune and even Mewtwo.

Source: Pokémon GO Hub