@suigyoken: I can tell you from personal observation of a cease & desist letter, that copying manuals was the one thing that Nintendo, Sega, et al. were able to prosecute game rental stores over, during the 80s and 90s. Courts let stores rent out original carts, but violating copyright law to photocopy a manual which inevitably gets stolen didn't slide. This is why bigger national chains had the paraphrased quick summary of story and controls printed on a rental box.
Copyright applies to box art and disc/cart labels of course, but in the case of box art, that is a necessary showpiece in order to sell the game. It needs to be seen so people recognise the product. Counter-effective to prevent that.
Although... this brings up a meta-concept page I've wanted to pursue for a while... (Games with) Manuals with Note Pages. :)