I dunno, I think they were pretty obviously trying to make her hispanic. I mean them making her skin color that way, speaking spanish, well heck even on the wiki page it lists her as latina in that movie.... I mean even the first two qualifies as yes, she was that in that movie lol. It wasn't just poor voice acting [and that would be poor voice acting to give a well known character a new accent and style when she wasn't intended to have it] or oops they got her skin color wrong. They clearly intentionally made her hispanic, even if they didn't overly slap you in the face with it.

That they saved for Fred. He went from brave and slightly cocky, but still well adjusted and smart guy to literally almost wanting to have sex with the mystery machine and the biggest idiot that has ever been shown on the show.