Cartoon Network's 20th Birthday was a television special celebrating the first 20 years of Cartoon Network: 1992–2012. The special ran from October 1 to November 4, featuring episodes of former programming such as Ed, Edd n Eddy; Camp Lazlo; My Gym Partner's a Monkey; Foster's Home for Imaginary Friends; Codename: Kids Next Door; The Grim Adventures Of Billy And Mandy; Johnny Bravo; Powerpuff Girls; and Dexter's Laboratory.

Class of 3000 AppearancesEdit

Class of 3000 appeared twice on the special, with the episodes "Funky Monkey" and, "Peanuts! Get Yer Peanuts".

On the promotional poster, Li'l D was pictured, playing his drum sticks on Robot Jones' glass head.