Although King Harkinian is pretty much an omnivore, as much as a human being could ever be, his favourite food is by far the fabled Munf Munf cereal. One curious exception to his habit of eating everything that's on the dinner table is spaghetti, which he loathes deeply, decreeing that nobody bring it into Hyrule Castle. Luigi and Mario are the only people banned from the Hyrule Kingdom for life for violating this order.
Source: tatoeba (4401896)