I only ask this because the mewtwo in the Pokemon movie (Genesect and the legend Awakened) has a diffrent but similar backround story in comparison to the mewtwo in the first movie and it has a different voice as well.
I’m thinking its a different Mewtwo!
Pleaselog inorregisterto add a comment.
It has a similar background to the Mewtwo who was in Mewtwo StrikesBack, but it is adistinct, separate individual.
Bulbapedia confirms that these are indeed two distinct Mewtwo, despite having a very similar past. There is indeed more than one Mewtwo
Source 1
Apparently,this guywas able to translate the page and find out that a staff member was able to confirm there were different Mewtwos, one in the first movie and the other in Genesect: The Awakening.
So yeah, there are two different Mewtwos.
Hope I helped. :)Source: Above Link