So I just read the book Super Mario by Jeff Ryan and something that stuck with me is his description of the callousness of one of the very higher ups at Nintendo in the early days even before Donkey Kong was created. He said that the man took his daughter to Geisha clubs. It gave me a new sinister view of Nintendo and this idea of devil Mario had been floating around in my head before then so I decided to draw it up. The book was very interesting too.