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	- The kids who loved SpongeBob were not fans of Zim. SpongeBob was Nick's flagship show [and] Invader Zim [wasn't popular with the same audience, thus it] was cancelled. This ended up being tragically ironic, since the market for cartoons that appealed to older audiences was just a few years away with shows like Adventure Time and Regular Show. — Sean Aitchison from Screen Rant (en)
 
	- Invader Zim was too dark and subversive for Nick's core demographic — and much of the humor flew past the heads of their younger viewers — but in retrospect Vasquez and his director Steve Ressel did everything right. The episodes never play it safe, nor are predictable. It marches to its own drummer – and that's as it should be. — Jerry Beck, Animation Historian (en)
 
	- Kevin's music wasn't just an addition to the show, it was crucial for the show to be what it was. Without his intense sounds lending a sense of urgency and seriousness to the ridiculous proceedings within Zim, I could never have given the good little children of the Earth as many nightmares as I did. — Jhonen Vasquez (en)
 
	- There were some elementary schoolers who fell hard and fast for [Invader Zim], while their older siblings — or parents — found a reason to tune into Nickelodeon again. (en)
 
	- There was no way I was gonna say 'no'. The fact that they took a chance on someone a lot of people wouldn't have given a kids show to is one of the coolest things that ever happened to me in my life. — Jhonen Vasquez (en)
 
	- Online petitions [to bring the show back] went up everywhere, and people rallied for the return of [Invader Zim], and those followings have become stronger over time, especially with the advent of the Internet." — Tim Jones from The Daily Collegian (en)
 
	- I'm always confused when people say how much they miss Invader Zim because the show never stopped running in my head, and then I remember everyone else isn't in my head. I try to imagine the world for all those people who don't know what Zim's been up to since the show went off the air and it makes me shudder. How can people live that way? Hopefully this comic helps make the world a better place. — Jhonen Vasquez (en)
 
	- There really aren't any attempts to be subtle with the material. It is flat out disgusting at times, and that's what makes it shine. The truly random and dark humor of Invader Zim was too unique to be copied, but a nice representation of the kinds of programming seen at the time, with shows like Rocko's Modern Life and Are You Afraid of the Dark? pushing the boundaries of what was considered acceptable children's television. From Zim growing a massive pimple with hypnotic powers, to the class pet hamster, Peepi, evolving into a colossal beast known as "Ultra Peepi", to the glorious introduction of Mini Moose, the show had enough originality to last it a decade. (en)
 
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