The Imperiex probes were android duplicates of the originator Imperiex-Prime, though much smaller in size. The Imperiex probes were first seen when Mongul, the son of the deceased villain of the same name, arrived on Earth stating that Imperiex had destroyed Warworld and was heading for Earth. Mongul convinced Superman to help him fight Imperiex, and the two managed to defeat it. However, it transpired that the "Imperiex" they had encountered was no more than a probe, whereas Imperiex Prime, leader of the Imperieces, was himself a much larger and more powerful being.
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