According to Serebii, one of the leading Pokemon websites, the new Pokemon is called Pokemon is called Magiana (マギアナ) and was shown off in the latest issue of CoroCoro a Japanese monthly manga magazine.
Serebii continues to say it is Man-Made Pokémon putting it into the same category as Mewtwo however no type has been revealed. It possess a metallic body text confirms it was ‘made by human hands’. It was made over 500 years ago.
Now this brings into question if we will see an announcement for the possible next installment of Pokemon soon, or if this is complete unrelated. Whatever the case, Mewtwo is no longer alone, and he can finally be happy.