Jellystone! will be expanding its animated world even further with a massive Cartoon Network crossover event, and the creator behind it all has confirmed many classic shows appearing in the new special, "Crisis on Infinite Mirths." Jellystone! has been showcasing a wide library of Hanna-Barbera projects and licenses with its new animated series streaming on Max. The three seasons shared thus far have seen all kinds of unexpected shouts outs and crossovers over the years, but now the series is definitely going even bigger by incorporating Cartoon Network's massive library of classic shows too with a new special event episode.