Have you ever got the feeling that Super Mario Bros. is simply an analogy for an Italian plumber's drug addiction after his girlfriend, Pauline, dumps him due to his low ambitions in life.
Apparently, Mario, in his drugged out state, has casted Pauline into a princess; thus, personifying her as everything good and pure in his miserable little life. King Koopa, the guardian against his princess, is the embodiment of his drug addiction that keeps him from achieving his happiness.
Yes. That must be it.
