Based on an interview with the producer of the show, from like 2007. There's a whole script WIP of a MOVIE.
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This is just my interpretation. Unfortunately, there's no found documents for these scenes.
I feel like Robotnik actually caring for Snively more often in these flashback scenes, depending how far back they go, would really build up a nice backwards character arc.
Also Robotniks cybernetic eyes explanation here is just my interpretation as well. I refuse to believe they've always been that way. They've literally glowed before.
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