Abercrombie Fizzwidget, boss of the Megacorp company, hires Ratchet and Clank to retrieve the "protopet", an artificial creature stolen by a masked thief. The duo retrieve the protopet and confront the thief, but "he" turns out to be a female, Angela Cross, who helps them investigate the protopet's true origins. They find out that Abercrombie Fizzwidget is Captain Qwark in disguise and that he created the protopet to spread disaster across the galaxy. He plans to frame Ratchet, Clank and Angela, and then destroy the original protopet to restore his reputation as a hero. Qwark then films himself attempting to "cure" the original protopet using a device made by Angela. The device backfires, and turns the protopet into a huge mutant monster that the duo will have to defeat as a final boss. Following this, it is revealed that Qwark kidnapped the real Fizzwidget in order to conduct his plans.
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