Little Mac is the playable protagonist in the NES version Mike Tyson's Punch-Out!!, which, later re-released as Punch-Out!! featuring Mr. Dream, and the Wii title Punch-Out!!. Little Mac is known by fans for his jumping uppercut called the Star Uppercut, which has a greater deal of strength than the normal punches. It may knock out his opponents depending on how much energy they have left.
He is described as being 17 year old, 4"8, 107 pounds, and hailing from the Bronx, New York. He is interested in getting into the World Video Boxing
Association, which has a long history of rookie boxers joining the ranks in an effort to become world champions. He traveled New York in hopes of searching for someone that could train him. He met 200 different trainers and was rejected 200 times. It was not until he met Jerome "Doc" Louis, who was a former heavyweight champion in his own right, that he began his journey to the top of the Boxing circuit. Doc gives Little Mac advice between rounds in both games.
Doc Louis put Little Mac through a hard training regime, in which Little Mac was eventually able to overcome. Once it seemed that Little Mac was ready, Doc Louis put his skills to the test. Little Mac fought the likes of King Hippo, Soda Popinski, Glass Joe and many other boxers before reaching the final fight against Mike Tyson later replaced by a generic character called Mr. Dream, which saw Little Mac gaining the victory and the championship. In the Wii Punch-Out!!, the final opponent is Mr. Sandman.
In other appearances besides the NES Punch-Out!! games, Little Mac appeared in the Wii title, WarioWare: Smooth Moves in one of the micro-games based on the NES Punch-Out!! games. He later appeared as one of the Assist Trophy characters as well as one of the regular Trophies in the Wii title S uper Smash Bros. Brawl. In that game, he does his one-two jabs and punches he learned from Doc Louis, as well as his Star Uppercut.
The SNES version of Super Punch-Out!! features a blond-haired boxer named by the player. The Electronic Arts game, Fight Night Round 2 for the Nintendo GameCube claims that this character is "Little Mac" (or simply "Mac" according to the boxers he wears), but as the Fight Night series was not made or released by Nintendo, this is not considered canon; however, Nintendo hasn't confirmed whether or not that this is the remake of the original Little Mac.
He also makes a cameo in many comic books, including The First Fight, Outsiders, Captain N and Fox and Hounds. He can also be found as a Hasbro Action Figure, as an Applause action figure, and in a Topps trading card series. In the Wii game Captain Rainbow, Little Mac appears as a supporting character. He also appears in Super Smash Bros. Brawl as an Assist Trophy.
Little Mac makes his first appearance as a player character in the Smash Bros. series in Super Smash Bros. for Wii U and Nintendo 3DS. He has a special gauge in the game inspired by the power gauge from Super Punch-Out!! that when filled, gives him a one-hit K.O. uppercut. He can also turn into the hulking Giga Mac first seen in the multiplayer mode of the Wii Punch-Out!!. His abilities while on the ground are significantly stronger than when he is in the air.