Mewtwo Coming to Exclusive Raid Battles Soon! – Pokémon GO

Analysis of Shadow Mewtwo and future Shadow Legendaries in Raids

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Legendary Pokémon Are Coming to 'Pokemon Go' Very Soon

Pokemon email news letter pretty much confirms he will land after the 31st of August (maybe?) : r/TheSilphRoad

Pokemon Go UPDATE: Mewtwo confirmed for Raid Battles, it's coming on THIS date, Gaming, Entertainment

Mewtwo, Bulbasaur, Charmander and Squirtle are currently appearing in Pokemon Sword & Shield raid battles

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