Equestria Girls Friends With Doug
The Powerpuff Girls Babies With Rugrats
SpongeBob SquarePants Squid Day Off With The Ren and Stimpy Show
Homer Simpson Fresh Water With Rocko Morden Life
Codename Kids Nextdoor Surprised Numbah 3 With Aaahhhh Real Monster
Football Head With Hey Arnold!
Beaver Pinkie Pie With The Angry Beavers
Twins With CatDog
The Powerpuff Girls Squirrel With The Wild ThornBerrys
My Little Pony The Movie Sea Ponys With SpongeBob SquarePants
Family Guy Roller Skating With Rocket Power
Dexter’s Laboratory Dog Turn Into The Dinosaur With The Adventure Of Jimmy Neutron Boy Genius
Pinocchio Wishing With The Fairly OddParents
Elements Of Harmony With Avatar in Last Airbender
BlueBob PuppyPants Episode 2 Band Geeks With The Loud House
The Bad Guys With Invader Zim
The Powerpuff Girls All Chalked Up With ChalkZone
Secret Life Of Pets With Tuff Puppy
Robot With My Life as a Teenage Robot
Cat With CatScratch
The Loud House Yes Man Lori Loud and Leni Loud With Icarly
Sunset Backstage Pass With Sam&Cat
Scooby Doo! Courage Of The Cowardly Dog Ghost With Danny Phantom
Kung Fu Panda Ninja With Teenage Mutant Ninja Turtles
Equestria Girls Rainbow Rocks With Victorious
Fluttershy Animal Roar Song With Tak Of The Power Of Juju
Cartoon Comparison Chart Retro Nickelodeon Edited

I get all the references, except Doug.

@Dirty Bit  
Looks more like Ren and Stimpy style to me.

@Dirty Bit  
And also Maud’s chill/stoic. They look like both of Arnold’s defining traits.

Oh god, not modern Fairly Odd Parents! Get me my fainting couch!

@Background Pony #48F2
 
Pinkie’s head and body are weirdly shaped, like some of the characters on the show. A vague explanation, yes, but remember that Arnold’s head is shaped like a football

I don’t get the Hey Arnold one.

IN ACTUALITY IT WAS REN AND STIMPY FIRST AND THEN RUGRATS AND THEN DOUG.

@Nattes Novgrel  
I don’t get your face.

@Nattes Novgrel  
Annoying childish character drives other character insane.

I don’t get the Spongebob one.

Hmm, how about SNICK? Or Nick-coms?

@EmployeeAMillion  
That’s fine by me

@Vinyl Fluff  
Fun fact: So has The Fairly Odd Parents (although it’s newer episodes aren’t that notable and Nick doesn’t even make a big deal about the series anymore).

@EmployeeAMillion  

 
Yeah, that’s why I kind of rate it as a newer one, because it’s been going so long and still is, AFAIK.

@Vinyl Fluff  
Okay true, but one more thing. SpongeBob came between The Wild Thornberrys and Rocket Power, but eh, it’s been on so long it could pass off as any generation starting at 3.

@EmployeeAMillion  

 
Oh don’t get me wrong, I don’t think only those three are the cutoff point for me. I just remember when they were the only NickToons in existence. I’d break it down like this (using only the shows you listed.)
 
Ren & Stimpy/Doug/Rugrats - Original NickToons  
Rocko’s Modern Life/AAAHH! Real Monsters/Hey Arnold! - Second generation NickToons  
The Angry Beavers/CatDog/The Wild Thornberrys/Rocket Power - Third generation NickToons  
Fairly Oddparents - Fourth generation NickToons  
Jimmy Neutron/SpongeBob - Modernish era
 
Again using only the shows you listed. So pretty close in sequential order of your chart. I’d still consider everything prior to FOP as retro, my complaint is only about Avatar basically. It just feels so wrong to consider it a NickToon the same way as the others.

@DerpyH.17  
Okay, but is it alright if I re-use the Jimmy Neutron image for Dexter’s Lab if I can’t find another suitable one (and for Johnny Test and Phineas and Ferb if I ever do them, because let’s face it, all four of them are the same friggin’ show)?

@Vinyl Fluff  
Personally, I consider Jimmy Neutron to be the cut-off date for Retro NickToons (and 2001-02 in general to be the cut-off date for retro culture), but that’s probably because I’m much younger than you, so what I consiser the past is vastly different to what you do.

please do another one with the cartoon cartoons

I hummed the theme song from each show to myself.
 
Too bad there couldn’t be anything good for Invader Zim or Kablam.

I remember when “NickToons” referred to Ren & Stimpy, Doug and Rugrats only.
 
I’m a little annoyed at Avatar being referred to as a “retro NickToon”, considered it was 14 years after the original three.