Colonel Sanders makes several appearances in
"Kimagure Orange Road." He's also in "Marmalade Boy."
There's at least one more place I've seen him, in addition to
the other titles mentioned, but can't recall it. Possibly in "Yawara."

Since "Dr. Slump" and "Dragonball" were done by the same guy,
there will be a similar look and feel to the characters. Suppaman is
super only in his head. In real life he's just a schnook.... ^_^