Creator of the Doomsday Man (initially used to steal the Cobalt Bomb and black mail the USA), he aided the Silver Surfer in defeating it, he was eventually destroyed by his own creation, whilst trying to save it from falling into the Earth's core, Doomsday Man lashed out and hit Dr. Kronton with a finishing blow.
Has great knowledge of the construction of robotics and structural integrity.
Strength of a normal human of his age and build
- 2 Appearances of John Kronton (Earth-616)
- Media John Kronton (Earth-616) was Mentioned in
- 1 Images featuring John Kronton (Earth-616)
- Quotations by or about John Kronton (Earth-616)
- Character Gallery: John Kronton (Earth-616)
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