Mandark

"Oh please, sir. Call me... Mandark!"

- Mandark

Mandark is the main antagonist in the cartoon series Dexter's Laboratory and sworn enemy of fellow genius Dexter.

History
He is in many ways the Anti-Dexter: while Dexter is an incredibly knowledgeable knowledge with an otherwise ordinary life Mandark is an openly fiendish inventor who is not motivated so much out of curiosity as he is greed, hate and outright malevolence. He share some certain similairities with his younger sister and they are both the opposites and rivals of Dexter and his sister Dee Dee, the latter he is madly in love with.

Mandark takes great joy in inflicting misery on Dexter but due to his obsessive love for Dee Dee, Mandark has at times allied with Dexter - though these unions are rare and doomed to failure due to the two having very different views on the world.

Mandark is arguably seen at his most evil during the one-hour special episode / mini-movie known as "Ego Trip" in which he progressively grows worse in varient futures: to the point of becoming an outright monster by the end of the movie who engages in a "final showdown" with his nemesis, aided by an entire army of variant Mandarks from many different time-lines.

Trivia

 * He and Vector Perkins, also Mr. Crocker have a similiar face appearance. Like Vector, he wants to be smarter than the main protagonist.
 * Despite being evil, Mandark is shockingly cute.
 * Even though he is in love with Dee Dee (Dexter's sister), he has so far not made any plans to make her his queen consort (unlike villains like Cohila, Max Exterminus, Darkseid, and James Nixon McGarfield) because his only goal is to prove himself superior to Dexter, not rule and conquer.