The Cartoon Theatre Marathon was a 12-hour Cartoon Theatre marathon that aired on December 5, 1998 from Noon to Midnight. The marathon included a lot of movies.
- 12:00 PM - Scooby-Doo Meets the Boo Brothers
- 2:00 PM - An American Tail
- 4:00 PM - The Land Before Time
- 6:00 PM - Balto
- 8:00 PM - Daffy Duck's Quackbusters
- 10:00 PM - The Man Called Flintstone
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