Johnny Quick was a supervillain on the alternate Earth designated as Earth-Three, but rather than being a counterpart of the Earth-Two Johnny Quick, he was a version of The Flash.
Pre-crisis
The pre-crisis version of johnny quick came from earth 3. He was a villain and used his super-speed to commit crimes. During crisis on infinite earths, he was killed by the anti-monitor's energy wave.
Powers
Johnny Quick had super-speed as his primary powers.
