I'm sure a lot of people here are familiar with the Fairly OddParents Heart ID. Looking at it, it resembles the style of the first season of FOP, which utilized digital ink and paint for it's animation.
However, a few years ago, Butch Hartman posted a YouTube video where he shows off cels and animation drawings from his shows. This includes cels from the Heart ID, which, like I just said, was colored digitally. The cels of the ID Butch shows off resemble the style of the Fairly OddParents Oh Yeah! Cartoons shorts, which were cel animated. The video can be seen here.
So, basically what I'm saying is that there was an alternate version of the bumper that was created. I don't know if it ever aired, but I think it was more than likely scrapped before it could get to that point. Finding it would probably be very very difficult, but I just thought this was interesting and wanted to share.