Justice League - Crisis on two Earths 2936
Johnny Quick (voiced by James Patrick Stuart) is a villain in Justice League: Crisis on Two Earths. He is an evil alternate-universe version of Justice League member, the Flash.

Johnny was one of the six founding members of the Crime Syndicate who terrorized the Earth they inhabited, keeping its governments in near submission by threat of a nuclear war. He was one of the members who favoured the use and development of a quantum-powered nuclear weapon that would destroy all life on Earth if the Earth governments refused to relinquish what little power they had left to the Crime Syndicate. However, when Owlman stole the weapon and transported it to a parallel Earth universe called Earth-Prime to destroy all realities, Johnny Quick helped Lex Luthor and the Justice League stop Owlman by vibrating his molecules to a fast enough speed in order to open a rift between the Crime Syndicate's Earth and Earth-Prime. Upon Batman's return from Earth-Prime, though, the incredible amount of molecular vibration speed had aged Johnny Quick to the point of death - he bravely sacrificed himself to save the world he had terrorized. Now knowing Batman knew this would happen, which is why he asked Quick to do it instead of Flash, All Quick did was smile and congratulate him on tricking him.

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