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Far as I understand, the Mecha Sonic shown here made his debut in Sonic & Knuckles. There has been at least one Sonic bot before him, specifically Robo Sonic (popularly referred to as Silver Sonic) who made his debut in Sonic the Hedgehog 2. Two, if you count the Game Gear Sonic the Hedgehog 2 Sonic robot as a different robot, which re-appeared in Sonic Mania as part of Metal Sonic's boss fight.--Akamia 01:13, March 10, 2019 (UTC)

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