Here's a list of some of my all time favourites:

Dexters Laboratory
Johnny Bravo
Cow and Chicken
The Powerpuff Girls
Ed, Edd n Eddy
Courage the Cowardly Dog
Samurai Jack
Grim & Evil
Codename: Kids Next Door
Camp Lazlo

Can't remember any others

Fun fact: When I was really young I used to call Dexters Laboratory "Dexters in the laboratory" Don't ask me why... I was young okay? xD

Ed edd and eddy.
Courage the cowardly dog
Johnny bravo.

Courage, Jack and Dexter.

I remember watching more than a few of these while waiting for the school bus. Ah memories.

samurai jack
codename kids next door
The Powerpuff Girls

1143718 same

1143678
Dexters Laboratory

Johnny Bravo

The Powerpuff Girls

Ed, Edd n Eddy

Courage the Cowardly Dog

Samurai Jack

Grim & Evil

Codename: Kids Next Door

Camp Lazlo

Batman The Animated Series

Justice League

Teen Titans

Hi Hi Puffy Ami Yumi

Samurai Jack.
Teen Titans.
Powerpuff Girls.
Code Leoko.
Ed, Edd, and Eddy.
Dexter's Laboratory
Courage the Cowardly Dog.
Megas XLR.
Johnny Bravo.
Codename: KND.
Grim & Evil.
Grim Adventures of Billy and Mandy.
Scooby Doo.
Tom & Jerry.
Foster's Home.
Time Squad.
Space Ghost.
Robot Boy.
Ben Ten.
Hi-Hi-Puffy-Ami-Umi-Show.
Robot Jones.
...
...
Can't think of any others...
Now my heart hurts. WHY CARTOON NETWORK, WHY?

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Oh! And XIAOLIN SHOWDOWN!

1143678
That's why.

This sounded so much better when I was a kid.

1143678 well, here are my favorites.

Class of 3000 (you might not count it as a classic or not even remeber it, since it was short lived.)
Fosters home for imginray friends
Camp Lazlo
Ed, Edd, n Eddy
My Gym Partners a Monley (don't ask why. i was young)
Grim Adventures of Billy and Mandy
Corage the Cowadly Dog
The PowerPuff Girls
Dexter's labortory
Johnny Bravo
And i also recall Time Squad. not my favorite, but i remebered i liked it a little.

Good times with these shows. so many cherished childhood moments.
Why did it have to end? why couldn't continue forver?

1143802 i remeber that show so much! that showdown show. it's been years since i've seen it, but i remeber it. i forgot how the show ended though. and sadly, i don't own the first season DVD when it came out, like, i think, 2005?

1143873
Oh my god. I have been looking for this since I was a child.

1144125
I remember Classe of 3000. I didn't consider it a classic, but I still enjoyed it.

1144166yea. i kind of own the entire seirs on I tunes, but there are one or two episodes that are missing though.

KND
Billy and Mandy
Foster's Home
Ben Ten
Scooby Doo
Teen Titans
Code Leoko
Tom & Jerry
Courage the Cowardly Dog
Samurai Jack

*Breathes Deeply*

Johnny Bravo

Dexter's Lab

Class of 3000

Codename: Kids Next Door

Courage The Cowardly Dog (Though it's still showing episodes in the Philippines[that's where I live])

Powerpuff Girls (Bless you, Lauren Faust)

Batman TAS

Scooby-Doo

Samurai Jack (Love each episode)

Tom & Jerry

Teen Titans

Grim Adventures of Billy & Mandy

Does no one remember Digimon?

Or how to spell Lyoko right?

Ed Edd n Eddy
The Powerpuff Girls
Dexter's Laboratory
Samurai jack
Beyblade
Dragonball Z *That show did feature on cartoon network from time to time*
Foster's Home
Johhny Bravo
Courage the Cowardly Dog
Xiaolin Showdown