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They weren't really permanently good. Plus, they're mainly used for comic relief anyways, so it's not as if much depended on their existence, kind of like Chris (although Chris is a bit more like a main character). Although things did take a serious turn when they (seemingly) betray Doctor Eggman, they eventually just ran back to him because they knew they couldn't really turn on their creator.  Timelinesplitter Chaos 13:38, January 18, 2013 (UTC)