From my understanding, the bumper(s) aired from some point in 2007 to 2008 on Cartoon Network, and the only documentation of them comes from this Twitter thread (). The Throwdown dance battle bumper, which also appears to be from this time has been found and documented in HD.
It’s unknown how many bumpers there are (most likely 1 or 2), or what region they are exclusive too, since the images appear to come from a Japanese CN channel. Sources have said that they aired in the U.S. too, especially in 2007. The user who posted the images has been inactive for a while, and hasn’t answered to any dms of mine from the past year. I’ve also tried to contact some crew members that worked on these (aka everyone that worked on the main show “Class of 3000”), but have had no luck. One of my friends said that someone did have them, but the flash drive they were on was corrupted.
Any help is greatly appreciated to find some bumpers from my favorite show.