Sumo Fighter is a side-scrolling platformer where you play as a sumo wrestler who must rescue his kidnapped girlfriend by crossing five levels. Each level consists of three stages plus a boss, with the goal of reaching the end to save your love.
The gameplay involves using two attack methods: punching and stomping. Punching deals damage to enemies, while stomping not only inflicts harm but also can stun them. You'll earn experience points for defeating enemies, solving mini-games, and collecting power-ups that grant temporary benefits such as increased health or invincibility. As you progress through levels, you can upgrade your attacks or boost your maximum health.