2 things:
1. I agree Krystal from Star Fox is a full blown furry hottie

.
And 2. Regardless of any dialouge based translation, unless those humans in the lab center admitted to some sort of wicked, heartless, barbaric act or crime in their brief stint of coversation with Mewtwo, his actions will never be excused.
I also saw absolutely nothing wrong with the dubbed version of Mewtwo's movie, or any of the other Pokemon films. I have also seen at least half of the first movie through clips and brief moments in japanese dialouge.
And like I said before, I never have any beefs with dubbing and words or no words, actions speak louder then words. My main thing is revolved towards Mewtwo's killing the scientists that created him. I'm not saying he didn't become good.
But what he did was not something I can ignore.