Kochin is the one who created the three bio warriors Kishime, Misokatsun and Ibifurya. He gathered the Dragon Balls and used his wish to free Dr. Wheelo from his icy prison in the Tsurumaitsuburi Mountains (Tsumaitsubi in the dub) after fifty years. He spent the remainder of his time inside Wheelo's fortress, commanding the actions of the bio-fighters from the control room. The first evidence that Kochin was more than he seemed came when he attempted to kill Krillin. He lifted his arm and the skin on his hand ripped away, revealing a mechanical hand underneath, which then transformed into a rotating machine gun.
His gunfire damaged some of the equipment powering the forcefield which held Bulma prisoner, freeing her, but also leaving her open to attack. As Kochin took aim, Master Roshi attacked him and knocked his gun-arm off by unknown means. (Literally) disarmed, Kochin stood back and watched in shock as Dr. Wheelo began wrenching his giant mechanical body free from the laboratory wall. As he stepped out onto the laboratory platform, Wheelo's giant foot accidentally knocked Kochin off the edge and he fell down the main shaft.As he fell, his body got too close to the glowing dais which supported the laboratory above, and bolts of electricity arced out and struck Kochin's body, causing his clothing and skin to burn away, revealing a robot underneath. He muttered Dr. Wheelo's name in a broken, monotone voice before exploding in midair.
- Much of Kochin's past is unexplained. All that is known is he was Dr. Wheelo's assistant, and that he is an android. It is unknown if he was originally a human, and simply turned himself into an android to prolong his life, or if he was a creation of Wheelo.
- Also unexplained are the events surrounding his death. Precisely why the dais glowed like that and shot out bolts of electricity when the falling
- The fact the handle of his cane is designed to resemble Shenron hints at a fifty-year obsession with the Dragon Balls.