Apparently PEZ Candy released a series of animated shorts in 2006. The only information I could find on it was that the theme for them was called "The Saturday Morning" by The Juliet Dagger. As well as a few clips from what I assume are the shorts in the music video for the song. Song: youtu.be/0psMmbB7tlQ Music Video: sp.nicovideo.jp/watch/sm15351209
Hm, it seems interesting. Doing a quick google search all I can find is the music. Possibly the show itself is gone but the music is the only survivor. Do you know where it aired? I think we might find some information with the wayback machine. I will add the music sounds familiar although the show would before I would remember as I would be one or two but possibly I saw it and the music stuck with me or its the fact it sounds like a song from every early 2000s sitcom for kids. Edit: I am gonna put the PEZ website into the way back machine also I reread your thing so you didn't see it so where did you find the music (sorry its 2am)
Sorry for the late response. The only thing I know about the show is sadly the song and music video. The song was used for a Tooncast promo but that's all I really know as I couldn't really find much info on the song either.