It's pretty cool, I guess. Nice effort.
Now for some (hopefully) constructive criticism, the three most obvious things you could improve are proportion, posing and consistency in style. Sorry if i sound overly negative (as usual). Translating cartoon characters from their original style into another is incredibly hard and seldom truly successful, simply because often their distinct style makes up a major portion of their appeal and character, so if you wanna make your attempt look convincing you've gotta be consequent about stuff - let's take the heads for example. Some characters retain their original, stylized heads in your rendition (The Griffins for example), whereas others like Foxxy get super-generic circles for heads. Try to stick with one solution. There's also some funky stuff going on with the proportions of the children, the limbs of Dexter and the South Park kids are way too long and thin, they have virtually the same proportions as your adults - it just doesn't look right. The heads could be a tad bigger too, right now the kids look more like shrunk adults than children. Lastly, you've got some nice poses that work well (especially on the Simpsons), but overall too many poses are too dull or directionless in my eyes, are you aware of the swooshy "action lines" virtually all good cartoon poses are based around? If not, John K has some great tutorials on them.
Speaking of John K, here's my biggest criticism: No Ren&Stimpy? INCONCEIVABLE! INFURIATING!
I'm awfully tired at the moment, sorry if this doesn't make much sense. I might edit/correct it later.