FightingMario54321, whose username is often abbreviated to FM54321 or FM, is an American YouTuber, as well as one of SMG4's close friends. He used to be a Super Mario 64 machinimist and blooper maker, but he decided to quit that game in March of 2015.
Appearence[]
While FM5321's mainly red CC is somewhat similar to that of the game's default, Mario, there are several chromatic differences, most notably in his hair color, overalls, and gloves. He has black overalls, red cap, arms and shirt, purple gloves (which sometimes appear to be magenta due to greenscreen issues), brown shoes, yellowish-pink face, as with the default, and blond hair.