Susan "Mandark" Astronomonov is the primary antagonist in Dexter's Laboratory. He hates Dexter because of him being so much of a smarter and better Genius the him and he wants to destroy Dexter so that he will be the best genius around. He is voiced by eddie Deezen.
WARNING: You may add appropriate counterparts. But, do NOT delete any.
- Diesel (Thomas the Tank Engine and Friends)
- Bowser (Super Mario Bros.)
- Hacker (Cyberchase)
- Duncan (Total Drama)
- Stewie Griffin (Family Guy)
- Sigmund The Sorcerer (Fanboy & Chum Chum)
- Henrich Von Marzipan (Codename: Kids Next Door)
- Kazuya Mishima or Bryan Fury (Tekken)
- Mojo Jojo (The Powerpuff Girls)
- Draco Malfoy or Voldemort (Harry Potter)