back at the barnyard
Yakko, with Wakko and Dot are the Warner Kids in a Warner Brothers cartoon that played on The WB in the 1990's.
Code Lyoko. It's a French cartoon where 4 kids enter a virtual world called Lyoko.
The outsiders
A Pup Named Scooby-Doo!
Pretty sure it was "Toonsylvania".
osmosis Jones
Voltron .
Your show is called Code Lyoko, it's a French cartoon :).
Something
I think its hetalia axis power or something.
They get animated .cat eats/killsmouse trapchasedsquashed
Sesame Beginnings > No, that doesn't sound right to me. Something like, little monsters or something. Just not the PBS one; that's not it. What did some of the monsters look like? What channel did you see it on? Were these human monsters by any chance? Because I found a cartoon about these bratty little kids called Little Monsters.