ATLANTA (AP) — It's been a long, strange 20 years for the Cartoon Network, which has flourished during a time when animation traced its way from the likes of "Scooby-Doo" to the racy, trippy fare now shown on Adult Swim.

The network is celebrating itself all month with on-air tributes, starting with a video released Monday that features more than 100 characters that have appeared on the channel coming together in a rave-like dance party.

When the network launched on Oct. 1, 1992, it aired around-the-clock cartoons including those from the Hanna-Barbera library — which includes "The Flintstones" and "The Jetsons" — at a time when ratings for morning cartoons were dropping and "The Simpsons" was making its mark in prime time.