The Scooby-Doo/Courage the Cowardly Dog Scare-a-Thon was a week-long promotion that aired October 23-26, 2000 from 7:00pm to 8:00pm.
The block presented episodes of Scooby-Doo, Where Are You! and Courage the Cowardly Dog, and invited viewers to vote on who was the scardiest dog. The winner had his show featured in the 10-hour Scare-a-Thon Winner's Marathon, which aired on October 29, 2000 from 12:00pm to 10:00pm.
Tying in with the promotion was the Scare-a-Thon Sweepstakes, which viewers could enter online at CartoonNetwork.com and through a mail-in entry. The sweepstakes offered the grand prize of a trip to Roswell, New Mexico, and 100 first prize winners recieved a copy of Scooby-Doo and the Alien Invaders and a Cheetos snack pack.