Through a series of wild events, some of the main characters from The Grim Adventures of Billy And Mandy, The Powerpuff Girls, Dexter’s Laboratory, Samurai Jack, Johnny Bravo, Ed, Edd, n Eddy, and many more arrive in this animated series.

Thanks to Jellystone's "Crisis on Infinite Mirths," The Powerpuff Girls creator Craig McCracken's OG Bubbles got her hands on 2016 Bubbles.