Over the course of time, Cartoon Network, "the best place for cartoons", has aired many "mosaic" bumpers (also known as the "Who is This?" bumpers) during the Powerhouse era in late 2003 until early 2004. It featured the squares of the CN characters in the dark blue background, before the announcer explaining to the viewers for guessing of a character, and then forming a each character from the network's show (such as Ed from Ed, Edd n Eddy). Inevitably, with over almost 14 years of these behind us, some will go missing.
The following is a list of more notable lost bumpers:
- One mosaic bumper featuring Dee Dee from Dexter's Lab.
- Another mosaic bumper featuring Blossom from The Powerpuff Girls.
- Another mosaic bumper featuring Buttercup from The Powerpuff Girls.