In 2003, CN decided to give each short their own full length show. In each show a segment of Evil Con Carne was put between two Grim cartoons. Originally labelled Grim and Evil, the series was a combination of two shows in one. Out of the three, The Grim Adventures of Billy and Mandy won. The three final choices were The Grim Adventures of Billy and Mandy, Whatever Happened to Robot Jones?, and Longhair and Doubledome.

An Internet and call-in event, called the Big Pick was held August 24- 25, 2000. The Grim Adventures of Billy and Mandy was the first show on CN that viewers had a say in creating. Billy is voiced by Richard Steven Horvitz, while Mandy is voiced by Grey Delisle. The two main plot characters, Billy and Mandy, had won a bet against the Grim Reaper over a sick hamster, forcing him to be their best friend forever. The Grim Adventures of Billy and Mandy, created by Maxwell Atoms, is a animated series that currently airs on Cartoon Network in the U.S.