Little Mac is the main protagonist of the Nintendo franchise, Punch-Out! an assist trophy in Super Smash Bros. Brawl, and a playable character in both the Wii U and 3DS versions of Super Smash Bros.

Little Mac is seventeen years old and was interested in the World Video Boxing Association. In each game he rises through the ranks in order to become the champion.

In the Wii version of Punch-Out!, after becoming champion he keeps defending his title and eventually grows tired of the fame he gets as champion and decides to retire should he lose three times.