Moron Mountain is shown to be a gray planet with large neon sign around it. The entrance to the amusement park has a sign that resembles Swackhammer's face.
When a customer complains about the amusement park and says he never wants to come back Mr. Swackhammer overhears and tells the Nerdlucks that they need new attractions. After finding out about the Looney Tunes, Swackhammer sends the Nerdlucks to Earth to capture them.
His plan fails and after time and time again of abuse the Nerdlucks turned into the Monstars strap Swackhammer to a rocket and send him to the moon. The Nerdlucks then decide to stay on earth with the Looney Tunes. It is possible that Moron Mountain was shut down and turned back into a regular planet.