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Sonic the Hedgehog: Dr. Ivo Robotnik is working to take over South Island from his Sky Base and gather the 6 Chaos Emeralds, having kidnapped all of the island's animal habitants to turn them into robots called Badniks to do his dirty work. Hearing of Robotnik's plot, Sonic the Hedgehog heads to South Island to save his animal friends.

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Sonic the Hedgehog (Video Game 1991) - IMDb

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