#4 Luigi Exists Due To NES Memory Limitations
Mario and Luigi always go hand in hand. One cannot think about the evergreen, Mario and not think of his twin brother, Luigi. However, truth be told, the reason for Luigi’s existance is the lack of Memory on te NES. Nintendo were unale to create a separate character to allow for a second character in game.
This was a big problem and the only solution they came up with was to clone Mario and make him green. They further decided to brand them both as brothers as this was the only logical explanation that would answer the question, “Why do they both look alike.”