This category is for characters who have been referred to as geniuses within Dexter's Laboratory. Such characters are usually inventors, such as Dexter himself. Although despite this title, most characters who hold it usually lack knowledge in certain fields, such as common sense or the basics of compassion. Some may also be eccentrics whose intelligence is questionable. However many of this title are shown to be skilled inventors or highly knowledgeable in many fields both good and/or bad.


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