Overman King Gainer (OVERMANキングゲイナー,Ōbāman Kingu Geinā) is a mecha anime series directed by Yoshiyuki Tomino, that went on for 26 episodes between September 7, 2002, and March 22, 2003. The series was written by Ichirō Ōkouchi, and featured character designs by Yoshihiro Nakamura, Kinu Nishimura and Ken'ichi Yoshida. Before its Super Robot Wars debut, it appeared in the Another Century's Episode Series. King Gainer is also often compared to Combat Mecha Xabungle, another anime directed by Yoshiyuki Tomino known for its comedic elements.
This series, along with The Big O and Brain Powerd are owned by Sentai Filmworks as of 2013.