Earlier today, I did a quick read of a brief exchange from the translation. Holy [parasitic bomb], nothing sounded natural, Mewtwo talks in circles, and Giovanni's just as bad. There were perhaps a few lines that were okay, but they had only four or five words in them, and a line that short is a bit hard to make sound entirely awkward. The rest of them, though? Rewrite, rewrite, rewrite!
I'll start on that tomorrow. Should be mind-numbing fun.