Sid is a character who made his first and only appearance in the episode Drawn Together Babies. He is a non-canonical gag character who was shown to be a housemate of the Drawn Together house until he died of S.I.D.S. from always sleeping on his stomach. He never actually appeared in the episode, but he did appear during the theme song where he had one line of dialogue and proved to have had a lot of fun with the cast of the show. His only acknowledgement in the actual episode was where Mrs. Drawn Together yelled at her husband to stop screaming or else he'll wake up Sid. The screen then briefly cut to Sid's bassinet where he was shown to be dead and decaying.
Sid is a baby with pale white skin and pitch black pupils. He has a few long, withered strands of black hair on his head and he wears light green pajamas. He speaks in a starchy and gargled voice.
"I like to sleep on my stomach!"
Sid's name is derived from acronym for "Sudden Infant Death Syndrome" (SIDS) which is what he died from.