Based on the famous folkloric Japanese thief Ishikawa Goemon, Goemon is portrayed as a fiery young man from Edo (present-day Tokyo), with a sense to always fight for what is right. Much like his historical inspiration, he was originally a noble thief, stealing from the rich and giving to the poor, thus amassing a bounty which attracted samurai and ninja to target him. Goemon soon turned into a normal hero, defending Edo from various threats, ranging from pirates to space aliens, leading to the Lord and Princess Yuki to pardon him. Goemon uses a variety of tools and abilities in his adventures, including a giant kiseru he swings as a weapon, throwable Ryō coins which can be enhanced with fire magic, a chain pipe (which acts similarly to a grappling hook), and the ability to push large blocks. He can also use a Triton Shell to summon the gigantic fighting robot Goemon Impact, constructed by the Wise Old Man, a brilliant inventor. Goemon's allies include the hammer-wielding ninja Ebisumaru, the sword-wielding kunoichi Yae, and the bomb-throwing robot ninja Sasuke, who was also built by the Wise Old Man.
In Super Smash Bros. Ultimate
As a costume
In the Mii Costume reveal trailer, the Goemon Mii is accompanied by a female Corrin, Pit and Dr. Mario. This references Yae, Sasuke and Ebisumaru, the other three playable characters and Goemon's companions in Mystical Ninja Starring Goemon on the Nintendo 64.