Iwata: There’s a special system for a delivery man in the game. One comes to bring you items you weren’t able to carry before, and one is a pizza delivery man. This is something that has to reach the player at any stage in the game. It was a really reckless idea—the delivery man can’t just pass through walls that the player can’t walk through, so we had to make him able to navigate the map for himself.
If you'd like to read more from this classic 1994 interview with Iwata, check it out here!