Cartoon that was canceled you wish hadn't been.

[Innegativeion]

A ton of shows already said her.

Invader Zim is one of my favorites of all time.

Megas XLR turning up came as a surprise to me, and how much I enjoyed it was an even bigger surprise.

Courage the cowardly dog, so trippy, so creepy, so nonsensically funny.

Samurai Jack. Real ending plox? kthxbye.

Also, although it had a good run, Grim Adventures of Billy and Mandy. Loved that show.

 

[Worgen]

Ed Edd and Eddy
camp lazlo
power puff girls (altho it started getting a bit weak as it went on)
Harvy Birdman attorney at law (seemed like it just really got into its grove before it was canceled)
Moral Oral
Mary Shelly's Frankenhole (Im not sure if its canceled but I have a feeling it is)

 

[allways2edlast]

teen titans
It least it had a good ending, but felt like it could have lasted a other season. But hell better to leave you wonting more than drag it on long past the pont of anyone care for it. Witch a lot of mainstream animes need to learn. (looking at you naruto.)

Megas XLR
Oh hell, yea. I loved this show, can't believe they just up and canceled it. Didn't even give it a proper ending and got back to the the future and beat the squid faced aliens. (Can't remember how to spell they names.)

 

[AngryMongoose]

The Amazing Screw-On Head, though with only a pilot episode I'm not sure that counts. Still, it was freaking awesome, as should be obvious from the title.
Yes, that is a picture of a mechanical Abraham Lincoln; did I mention this cartoon was freaking awesome?

 

[Xerosch]

Harvey Birdman. It ran a bit dry in the last episodes but the potential for utter madness rivals that of Invader Zim.- Which shouldn't have been canceled, too!

 

[bigDrew]

Gotta agree with most of the stuff so far. But I really want to see more Justice League: Unlimited. How it ended was great, but there was so much more potential to the series.

 

[A_who]

I would want to see more of The Legion of Super Heroes. It ended cliff hangerish because they planned a 3rd season, but the accursed 4kids did something or another and it was cancelled.

 

[Dfskelleton]

Invader Zim again. I loved how absolutely bizzare it all was, and the animating style was really amusing. I also loved Courage the Cowardly Dog.

 

[afterburnzz]

Ed, Edd 'n' Eddy, Courage the Cowardly Dog, King Arthur's Disasters, Megas XLR, Samurai Jack.

 

[bootz]

Batman : the animated series
Eek the cat

 

[thecoreyhlltt]

deffinately freakazoid, AND, Two Stupid Dogs. those two shows produced some of the best slapstick and "immature" comedy i've ever seen

 

[Orcboyphil]

Jayce and the Wheeled Warriors, there was a movie planned.

Dungeons and Dragons, the kids never got home.

Exosquad, a third season was planned featuring an Alien invasion that was sorta Tyranidy.

I'm really shoing my age here

 

[Okamipsychonaut]

Well, it could not have gone on forever unlike crappy cartoons....Silverhawks. Yeah, and Invader Zim, but I got sort of experience Zim in Psychonauts when the same voice actor as Raz says "Cmon, just one Nightmare"

 

[Shirokurou]

W.I.T.C.H. never got a 3rd season. Counts for me, cause the source material allowed for more.

 

[jpblade666]

Anything from old nickelodeon or cartoon network.

if I had to choose 1 show it would have to be Johnny Bravo.

 

[synobal]

Batman : the animated series

You talking about the 1990's series? I remember that one it was rather good and a bit dark at times as well.

 

[Uber Evil]

Ed Edd and Eddy
camp lazlo
power puff girls (altho it started getting a bit weak as it went on)
Harvy Birdman attorney at law (seemed like it just really got into its grove before it was canceled)
Moral Oral
Mary Shelly's Frankenhole (Im not sure if its canceled but I have a feeling it is)

All mighty Wikipedia says it's on hiatus, which means it could come back.
Edit:

Dino mentioned that the show has not been cancelled and he was currently writing episodes for the second season, which he said would "probably air sometime next year", which would likely be in the early half of 2012.

 

[Eggsnham]

Invader Zim was pretty ridiculous and random, and I liked that.

But, for some reason (probably ratings) they canceled it.

 

[Nikolaz72]

Mad Jack the Captain.