Around 2012-2013 on the older Hub Network website, there was a series of bumpers for Halloween called "The Hub Gets Zombified". There was a clip for Dan Vs showing Dan and Chris walking around as zombies, there was a clip featuring Fluttershy from My Little Pony as a zombie, and the one i'm really looking for is the clip for Doodlebops Rockin’ Road Show, that had Deedee Doodle limping down the bus as a zombie saying "BopBop", which was the name of her dog. I've been trying to find these clips for a few years now, and I haven't been able to find any screenshots or any links or anything. The entire Hub Network site was changed and the clips are gone. I tried typing in the url into The Wayback Machine and I managed to find archives of the old Hub Network website, but I couldn't find any archives of the clips or any mention of the clips anywhere. I also need to note that these clips were probably 30 seconds to a minute long and i'm completely sure that these were official clips and not fan animations.
I also remembered A Yo Gabba Gabba bumper with a "zombified" Foofa laughing maniacally. I think she was saying the word "flowers"
I also vaguely remember an Homer Simpson bumper, as well as Danny Phantom. Tho I could be misremembering like I mentioned earlier. I can't guarantee anything.
According to a Reddit Comment, an unknown user made this statement: “I don't think Danny Phantom Zombified short is likely to exist, but Homer is possible. Even though some cartoons on The Hub aired a lot of older shows that Nickelodeon, Cartoon Network, Disney Channel, FOX, Hasbro Studios, HIT Entertainment, Sesame Workshop, and PBS Kids stopped airing, all of the known bumpers were current shows at the time. Assuming the bumpers were aired in 2011, MLP, Dan Vs, and Yo Gabba Gabba were still ongoing at that time, and Doodlebops Rockin Road Show had JUST aired its last episode 4 months before October. Danny Phantom had ended 4 years earlier, but The Simpsons was still ongoing to this day”