|This character exists primarily or exclusively within the Sonic Underground continuity.|
Information in this article may not be canonical to the storyline of the games or any other Sonic continuity.
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Destructo was a great player at the game "Castle Conquest" that Sonic and Manic the Hedgehog often played. He made new software to enhance the game but in the end, he turned out to be Doctor Robotnik, and been leading Sonic and Manic into the game to destroy them once and for all.