Dr. John was the creator of Android 99. He was a Scientist who wanted to study more about whether the aliens exist. Later he got an excellent idea of inventing a machine to sent it to outer space. Then he started building he robot and after inventing the robot he decided to give it some extra powers in case there is life on other planets and in case they attacked the machine. He was actually an evil doctor and a scientist. His plan is to dominate the world. So he then make the robot's mind pure evil and reprogrammed it to help him dominate the world and not to sent it to outer space. And not only that he also programmed it to have the ability to eat trees and mines to gain power, a lot of power. Some how Dr.John also know that there are a few saiyans still alive staying in space and he even know one of the saiyans' name. So he programmed his android to kill Mainus one of the saiyans who are still alive. But as soon as he awakened the android it immediately came charging towards the doctor and ate him but Dr.John before he was eaten attacked the android with all he got and since the android's armour wasn't really hard.. Dr.John was able to do alot of damage to it before he was eaten alive by the android. However the android had not known one thing that Dr.John had an emergency shut down device, which will shut the android down and force it to self -destruct. Dr.John's dream of conquering the world never came true. And since he was eaten alive there is no way he survived but tiny parts of his cell still remain inside the android. This Doctor also tested some experiments on himself and found a way to regenerate his body back to his own original form. But the doctor decided not to regenerate back, instead he thought of taking over the android's body.