Susan "Mandark" Astronomanov is the main antagonist in Dexter's Laboratory. He is Dexter's rival and later mortal nemesis who often seeks to destroy both Dexter and his lab to prove once and for all that he is the superior genius.
The biggest and most ambitious myCast story ever created where we take every piece of entertainment media, fix them our own special ways, and also theorize what would happen if this happened. Enjoy 2000 stories of groundbreaking fanfiction!
