Meet Mandark: Dexter’s Evil (and Extra) Rival from Dexter’s Laboratory

1. Who Is Mandark in Dexter’s Laboratory?

Mandark—whose full name is Susan Astronomonov (yes, really!)—is Dexter’s main rival in the series.

With his sinister laugh, gothic vibes, and obsession with outdoing Dexter, Mandark is both a villain and comic relief in his own unique way.

2. Mandark vs. Dexter: A Battle of Boy Geniuses

Like Dexter, Mandark is a child prodigy with his own secret lab.

However, where Dexter focuses on invention and science for personal exploration, Mandark often uses his genius to sabotage Dexter and claim superiority.

Their rivalry is a classic clash of egos and intellects—with hilarious results.

3. The Origin of Mandark’s Evil Genius

Mandark started out as an ordinary smart kid… until he met Dexter and felt challenged.

Fueled by jealousy and a desperate need to prove he’s better, Mandark embraced the “evil genius” label—and has been trying to outshine Dexter ever since.

4. What’s Up With That Laugh? “Ha-ha-ha! Ha-ha!”

Mandark’s laugh is one of the most iconic parts of his character.

It’s exaggerated, maniacal, and just plain weird—which makes it perfect for a cartoon villain. It’s become so recognizable that fans of the show can probably hear it in their heads right now!

5. The Secret Soft Spot: Mandark’s Crush on Dee Dee

Despite his evil persona, Mandark has a huge soft spot for Dee Dee.

He’s absolutely smitten with her, even though she barely acknowledges him—and often accidentally destroys his lab.

This crush adds an awkward and funny layer to his villainy.

6. Mandark’s Style: Goth Meets Geek

Mandark is usually dressed in dark clothing with a bowl haircut and an intense glare.

His whole aesthetic screams “dramatic genius,” and he thrives in the spotlight—even if no one else really takes him seriously.

7. Why Mandark Is More Than Just a Villain

Sure, he’s Dexter’s nemesis, but Mandark is more complex than just an evil boy-genius.

He represents the darker side of obsession, jealousy, and loneliness.

Underneath the over-the-top theatrics is a kid who just wants to be recognized and loved.

Frequently Asked Questions About Mandark

Q1: What is Mandark’s real name?
Mandark’s full name is Susan Astronomonov. The name was given by his free-spirited parents, and he absolutely hates it.

Q2: Why does Mandark hate Dexter?
Mandark is jealous of Dexter’s scientific achievements and popularity. He constantly tries to outdo him and considers him a threat to his genius status.

Q3: Does Mandark have a lab like Dexter?
Yes! Mandark has his own elaborate laboratory, similar to Dexter’s. It often features more sinister or gothic designs.

Q4: What is Mandark’s relationship with Dee Dee?
Mandark has a major crush on Dee Dee. However, Dee Dee is largely unaware of his feelings and often causes destruction in his lab without realizing it.

Q5: Is Mandark truly evil?
He likes to think he is, but Mandark is more of a dramatic, misguided genius than a true villain. His actions are often driven by insecurity and a desire for validation.

Q6: Who voices Mandark?
Mandark is voiced by Eddie Deezen, whose quirky and nasal voice adds to Mandark’s unforgettable character.

Dexter vs. Mandark: Which Boy Genius Are You?

In the world of Dexter’s Laboratory, there are two boy geniuses battling it out in their super-secret labs: Dexter, the lovable science nerd, and Mandark, the evil (and slightly over-the-top) rival.

But deep down… are you more of a Dexter or a Mandark?

Let’s find out.

1. What motivates you?

A) The thrill of discovery and building cool inventions
B) Beating the competition and being the best

2. How would your dream lab look?

A) Clean, futuristic, and high-tech
B) Dark, dramatic, and probably has a lava moat

3. How do you react to failure?

A) Fix it and try again
B) Blame Dexter—I mean, someone else

4. What’s your ideal morning?

A) Waking up early and heading straight to the lab
B) Laughing maniacally while plotting someone’s downfall (in theory, of course)

5. Your biggest weakness?

A) My sister Dee Dee constantly ruining everything
B) My uncontrollable crush on… Dee Dee 😳

6. What’s your fashion vibe?

A) Lab coat chic with goggles
B) Bowl cut, black-on-black, villain-core realness

🧠 Results:

🎩 Mostly A’s – You’re Dexter!

You’re curious, dedicated, and a little socially awkward—but in the best way. You love learning and prefer structure.

Your brain is always on, and even when things go wrong, you’re determined to fix them with science. Just… maybe keep an eye on your sister.

😈 Mostly B’s – You’re Mandark!

You’re dramatic, competitive, and secretly kind of emotional.

You crave recognition and tend to go a bit overboard when things don’t go your way. But hey, you’re still a genius—with flair.

⚖️ Mixed Results – You’re the Best of Both!

You’ve got Dexter’s smarts and Mandark’s flair for drama. You love to win, but you also love building cool stuff along the way. Balanced brilliance!