EDIT: Nevermind, I found it! DL link: https://drive.google.com/file/d/1vLJ4MjAaW98Be6Fi-z4Q9byhgtW6FG0w/view?usp=sharing
Around 2 years ago, the youtuber SpongeBranded [[1]] uploaded a few tests regarding his work in progress Cartoon Network Check IT 1.0 template. The tests got deleted or unlisted for unknown reasons. If I remember correctly, there were 3 day and 3 night bumpers. I also remember some of the shows that the test showed, such as like: Gravity Falls (day) and Code Lyoko (day if I remember). I could swear I have them on an old hard drive, but I can't find them. I'm currently searching those by the way. The videos were called 1.0 Test # - (Day/Night)
The [only remaining test] is up on YouTube. If you could find any of them, please message me on Discord. CartoonNearby#4522