hang on. are we talking about the pet rock that's with you from the beginning of the game? the one that learns skills for you and administers quests?
if so...all of those things are far too derogatory for the pet rock. they would destroy his dignity. I mean, come on. Just look at him, the way he acts. Is that something you could dress up or drag around on a leash? :)
However, I think pets would be very cool, and I suggested them in a previous thread.