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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 (Dr. Cochin in the anime version) was Dr. Wheelo's assistant and right hand man. They were once scientists working on an expirament to make Dr. Wheelo into the most powerful fighter in the world, when suddenly a blizzard occured 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. Some time 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 lenthy battle Goku destroys Mikatsun, Ebifurya, and Kishime.

Some time 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 afterwards, killing him.


 
Dragon Ball Movie/Sidestory Villains

Dragon Ball
Bongo | Raven | King Gurumes | Ghastel | Igor | Lucifer

Garlic Jr.'s Clan
Garlic Jr.
Makyans: Ginger | Nikki | Sansho
Spice Boys: Mustard | Spice | Salt | Vinegar

Dr. Wheelo's Forces
Dr. Wheelo | Dr. Kochin | Ebifurya | Misokatsun | Kishime

Turles Crusher Corps
Turles | Amond | Cacao | Daizu | Rasin & Lakasei

Lord Slug's Clan
Lord Slug | Angila | Commander Zeeun | Medamatcha | Wings

Cooler's Armored Squadron
Cooler | Salza | Neiz | Doore

Big Gete Star
Meta-Cooler | Cyclopian Guards

Ghost Warriors
Dr. Raichi | Hatchiyack | Frieza | Cooler | Lord Slug | Turles

Red Ribbon Androids
Android 13 | Android 14 | Android 15 | Future Android 17 | Future Android 18

Paragus's Forces
Broly | Paragus

Galaxy Soldiers
Bojack | Bido | Bujin | Kogu | Zangya

Army of Hell
Janemba | Frieza | Jeice | Burter | Recoome | Zarbon | Appule | Cui | Ginger | Nikki | Sansho | Ebifurya | Misokatsun | Rasin & Lakasei | Cacao | Daizu | Commander Zeeun | Medamatcha | Wings | Salza | Paragus | Bojack | Bido | Bujin | Kogu | Zangya

Chilled's Elites
Chilled | Cabira | Toobi

Third Stellar Region Army
Frieza | Sorbet | Tagoma | Shisami

Others
Aka | (Abo | Kado) | Beerus | Bio-Broly | Hirudegarn | Hoi | Maloja | Jaguar | Whis