There were quite a few I'll never remember the name of, but there were a lot of different renditions of A Christmas Carol with unknown characters on Cartoon Network or some other kids channel. I definitely remember Christmas Comes to Pac-Land[1], 'Twas the Night Before Christmas[2], A Jetson Christmas Carol[3], and one of the Flitstone Christmas episodes where they were acting in a play.
Which ones if you're able to recall?