User blog comment:Alpha71/Avatar Aang vs Mewtwo/@comment-5271520-20120718032954

I believe that Mewtwo has the advantage. His psychic powers are equal to Aang's elemental powers. However, Aang is a pacifist who values life immensely, while Mewtwo is very violent and was willing to destroy all life on Earth. In the end, Mewtwo's willingness to commit violence will allow him to win the battle.