To me, it's all donated from the games themselves. When gameplay elements revolve around gender relation, it's about breeding and making eggs, and moves like Attract or Captivate and abilities like Oblivious and Rivalry which set the framework. I don't think there's any hidden messages or subtle feelings towards either representation -- it is what it is. It's a simple little anime, happy and dumb and ignorant to other the real world crap (unless there's humor involved).
Also, Brock gets a numb-bum at every turn, so who cares what he thinks.
Also, Brock gets a numb-bum at every turn, so who cares what he thinks.