Cartoon All-Stars to the Rescue is a truly epic Drugs Are Bad special that was originally simulcast commercial-free on Saturday morning, April 21, 1990, on all three major American television networks (Fox had only been on the air for three years at that point), along with most independent stations and several cable networks. Produced by the people who award the Emmys (and animated by Wang Film Productions and Southern Star Studios in Australia). Cartoon characters ranging from Looney Tunes to Teenage Mutant Ninja Turtles try to teach an at-risk teen named Michael about the dangers of marijuana.The special was relentlessly promoted in the days leading up to the simulcast. Interestingly, the anti-drug angle was underplayed in these commercials. Instead, the ads pushed the insane crossover among the various "All Stars". The special has not been re-aired on any major networks due to a dispute over the use of Garfield being used without creator Jim Davis' permission, though the Disney Channel managed to sneak in a couple repeat airings of it.Extensive reviews of the special can be found here and here. You can find the special in its entire 32 minute glory on Google video.
Cartoon All-Stars to the Rescue provides examples of the following tropes: