>>16402883
Copyright and Trademark are not the same thing.
The law >>16402834 is referring to is about trademarked names being genericized, like how Americans always say "Kleenex" and "Band-aid" for tissues and plasters, and British people call all vaccuum cleaners "Hoovers". Those are all copyrighted names, but the companies that own them can't stop them being used all over the place because they're now universally accepted as the generic names for those things.
Disney is not going to lose the copyright to Mickey Mouse no matter how many innocent kindergartens paint him on their walls, and Nintendo is not going to lose the rights to Mario if people make fan games.
(Interestingly, in the late 80's/early 90's Nintendo WAS worried about losing their own name, because back then it was becoming a trend to refer to all video games as "Playing Nintendo" - they spent a small fortune on an advertising campaign to try and reverse this trend.)