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| Real Name: Simon Ecks | ||||||||
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| Place Of Birth: Unknown | ||||||||
| First Appearance: Detective Comics 261 | ||||||||
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| Group Affiliation: None | ||||||||
| Base Of Operations: Gotham City | ||||||||
| Grudges: Batman | ||||||||
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| Energy Doppelganger: Doctor Double X is able to create an energy duplicate, known as Double X, an entity living in a symbiotic relationship with Ecks. Double X can fly, generate lightning bolts and has vast strength. | |||||||
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| A lonely and introverted research scientist Dr. Simon Ecks discovered that the energy auras that surround every human being could be amplified, strengthened given enormous power and enabled to function separately from their host body. Ecks without waiting to test his invention used it on himself and created an energy duplicate he dubbed Double X and his fragile mind unhinged by the experiment and now dominated by his energy duplicate went on a crime spree. | ||||
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