I haven't linked to one of these in a while. It's a commercial for Kellogg's Corn Flakes featuring Huckleberry Hound and the characters on his original show. The great Daws Butler did all the voices except for Boo Boo, who was voiced by Don Messick. Pixie the Mouse didn't have a line but if he had, his voice would also have come from Messick. I suspect Pixie had a line but it was cut for time.
I loved these characters when I was seven years old and I'm still fond of them today, in part because they were such an element of my childhood. Another part would be that I got to know Daws Butler (and to a lesser extent, Don Messick) and loved them both. And it's nice to hear them and see these characters involved in something with better animation than they usually had even if it is being used to move a product…