The Hadouken comes from Capcom's Street Fighter series, where Ryu and Ken use it as a projectile attack formed by gathering energy in their hands and releasing it as a fireball. It became one of the most recognisable moves in fighting games through arcade play, home releases, and competitive tournaments, where its shouted name and hand motion are instantly copied by fans. Later games, cartoons, and online edits kept it in circulation, turning a fighting move into a broader joke for launching anything with exaggerated force.