Barom One

Two childhood friends, Takeshi Kido and Kentaro Shiratori, face a sudden threat when an unknown creature emerges from a lake and attacks them. As they near defeat, they are approached by a mysterious entity named Kopu, who informs them they have been selected to wield the power necessary to defend the world from a malevolent force called Goumon. Combining their efforts, they transform into Barom One, a powerful entity tasked with safeguarding the city.