John Corben

Early Life
John was born to Roger and Jane Corben on April 11, 1979, in Metropolis. John did not have a good childhood growing up, as his father would constantly cheat on his mother and his mother was an alcoholic that would take her rage against her husband out on her own son. This caused John to constantly act out in school, getting into fights and beating people to a bloody pulp. Corben was sent to the school councilor but would constantly ditch his sessions to hang out with the rest of the ruffians at his school and get into more fights. Due to his bad nature, John could not get accepted into any colleges and instead decided to become a soldier in the U.S. Army, fighting in the American/Markovian War. While in the war, Corben was informed that his parents had died in a car crash and, in spite of his bad relationship with them, was crushed.

Depressed and not caring about anything anymore, John began doing whatever he wanted in the war. He went AWOL multiple times, broke into the homes of Markovians and stole from them without them knowing, and broke several army rules, such as refusing to check where his bullets landed. In spite of this, John's commander, General Sam Lane, took pity on the boy and refused to discharge him. This turned out to be the biggest mistake Sam had ever made in his life. During a mission to take down a group of Markovian terrorists that had taken their own people hostage, John confronted one of the anarchists, who used a woman as a human shield from John. In response, John shot the woman in the leg to make him drop her and gunned down the terrorist. The woman never walked properly again and John was finally dishonorably discharged by Lane. Shortly after, he moved back to Metropolis.

Powers

 * Cybernetic Enhancements: After having most of his body shattered by accident during a fight with Superman, Corben was approached by Lex Luthor and had his body rebuilt from scratch, with only his human brain being the only non-robotic thing left of him. The rest of his body is made of a substance referred to as "Metal-0". His mechanical body also has a heart made of Kryptonite, which allows him to sap Superman of his powers.
 * Superhuman Strength: Corben's strength is great enough to bash through brick walls with ease. However, he is not powerful enough to beat Superman by himself.
 * Superhuman Durability: The Metal-0 that Corben's body is made of is so durable that the best Superman has ever managed to do is dent it with his bare fists.
 * Energy Projection: Some versions of Metallo's body have gauntlets on his arms that allow him to fire beams of energy that can damage Superman.
 * Enhanced Senses: Corben's robot body has granted him increased hearing and sight. He is also able to see people through walls by tracking their heat signature.

Abilities

 * Mlitary Training
 * Military Protocol
 * Military Aptitude

Weaknesses

 * Kryptonite Dependency: Without his Kryptonite heart, Corben's robotic body will shut down. Though his body seems to have a back-up generator for his mind, as he has never gone brain dead when this happens.
 * Technological Reliance: As mentioned before, Corben's actual body was shattered and he now relies only on his robotic one to get around.

Weapons

 * Kryptonite: He never leaves home without it.
 * Green Kryptonite: The most common and Corben's most used version of Kryptonite. It's able to drain a Kryptonian's solar energy and is toxic in large doses.
 * Red Kryptonite: Occasionally, Corben has swapped out his Kryptonite heart with a red one, which causes a Kryptonian's morality to flip. Though he rarely does this unless told to.
 * Gold Kryptonite: Corben has attempted to use Gold Kryptonite a good few times, as it's able to completely take away a Kryptonian's powers, similar to the effects of a Red Sun.

Trivia

 * Metallo and Robotman of the Doom Patrol have had a long-term rivalry ever since they first met each other.
 * John is both homophobic and sociopathic.