There is something from the seventh movie that Dogasu observed in his comparison, I'll copy/paste.
Brock: "Yuko, meeting you reminds me of a time in my life when I too spent long hours toiling as a professor's assistant. I'm sure Professor Ivy would be happy to vouch for my work."
Originally, he makes no such reference, and instead tells Yuuko that he's surprised that someone as young and beautiful as her could be a lab assistant. He then tells her that he would also be a good assistant, without mentioning Uchikido-Hakse.
I guess Brock's gotten over his Professor Ivy phobia, but, as far as I know, there's been nothing in the original Japanese version to indicate that he's gotten over whatever happened all those years ago. This will cause 4Kids problems if his fear of her name is ever brought up in the future. You'd think that after killing off his mom, the company would be more careful about taking liberties with Brock's relationship to all the other characters, but I guess not.
Yep. I couldn't have summed it up any better.