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But an avalanche sealed Dr. Wheelo inside an impenetrable wall of ice and snow. It was as if heaven itself was jealous of Dr. Wheelo's power and genius and tried to seal his fate inside a frozen tomb.
~ Dr. Kochin about Dr. Wheelo.

Dr. Kochin (also known as Dr. Cochin in the anime version) is the secondary antagonist of the second animated Dragon Ball Z film The World's Strongest.

He was voiced by the late Kōji Yada and currently by the late Tetsuo Gotō in Dragon Ball Heroes in the Japanese version, and by Paul Dobson in Ocean Group dub, Troy Baker in Funimation dub and Paul Bandey in AB Groupe dub in the English version.


He was Dr. Wheelo's assistant and right-hand man. They were once scientists working on an experiment to make Dr. Wheelo into the most powerful fighter in the world, when suddenly a blizzard occurred and caused a cave in and Dr. Wheelo was killed. He preserved his brain in a tank within a frozen fortress. After some time, old age caught up to him and he had his creations put his brain inside of an android replica of his body. Sometime later he gathered the Dragon Balls and summoned Shenron to thaw out the cave which was encased in ice.

He had previously heard of Master Roshi, who at the time of the cave in was the most powerful fighter in the world, so he sent some Bio-Men and some of his most powerful creations Mikatsun, Ebifurya, and Kishime after him.

Roshi defeated the Bio-Men but was defeated by the others. He later learns from him that Goku has surpassed him in power and tries to steal his body. After a lengthy battle, Goku destroys Mikatsun, Ebifurya, and Kishime. Sometime later he reveals that he has captured Piccolo and is using him as a tool to kill the others with by use of a mind-controlling headband.

Eventually, Gohan is able to destroy the device and revert him back to normal, but by this time Dr. Kochin personally attacks them using a cane that fires energy blasts and a machine gun arm.

Krillin broke the cane and Master Roshi karate chopped his arm off. Having no other choice, he puts Dr. Wheelo's brain inside a giant biologically engineered robot. During the fight, Dr. Wheelo's body got out of control and he accidentally steps on Dr. Kochin, causing him to fall down a shaft. During the fall, he is shocked by an electrical wire, causing his skin to come off his robot body and he explodes shortly afterward, killing him.


  • Bulma
  • Master Roshi
  • Goku
  • Piccolo
  • Krillin
  • Gohan


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