Little Mac works as one of the trainers in the Arena. He specializes in physical fighting portion of the training.
Little Mac (real name unknown) is a 17-year-old teenager from the Bronx who holds the distinct record of successfully kicking the asses of 13 full-grown professional boxers, and because of that has achieved worldwide fame. However feeling empty of his glamorous lifestyle, he decided take after his mentor Doc Louis, and bring his skills of beating up ethnic stereotypes to the Arena.
He has two forms: Wii and 8-bit. He only goes into 8-bit mode when female trainees flirt with him and he wants to look unattractive.