The Mario Bros. are having a normal day at Peach's Castle when they get a knock on the door. Mario grumpily answers the door to find Link holding a small bundle, which softly begins to cry. Mario lets him in, and he explains that Malon did giving birth. He asks them to care for the baby for a little while, which they agree to.
Many months later, Lucio, the child, can already crawl and speak one word: Mario. The two brothers decide to go and return Lucio to Link since he clearly isn't doing so himself. They travel over the mountains seperating Mario World and Hyrule, then head to the ranch and give Lucio to Link.
The next morning, Link runs to the Mario Bros, explaining that Lucio was stolen. They quickly find Dark Link to be the culprit and chase him into the Dark World. They find Lucio by yelling for him, to which he responds, "Mario!" After a battle, they escape from Dark Link.
- Lucio's name is an Italian name, and he carries a slight Italian accent as a result of being raised by Mario and Luigi for so long.
"Link's son is finally born, but the occasion is not happy."