Little Carl is an evil baby and is the rival of Benny. He is just a few months old but after watching Family Guy, he wanted to be like Stewie Griffin and as such: Became an evil baby.
He likes to terrorize anyone whether it's Mike and other people, stream characters, the RUC, or villains. His traps and pranks are usually outright sadistic and a few people have been known to die from them.
In short: He is one mean baby.