First I'll confess that I stopped perusing and merely skimmed this thread about the time the discussions about sidekicks began, so plaease forgive me for repeating.
Pancho and Cisco finished each radio show with a joke from Pancho.
e.g.
Pancho:Hey Cisco, why does a giraffe have such a long neck?
Cisco:I don't know Pancho, why does a giraffe have such a long neck?
Pancho:Because his head is so far from the ground>
Cisco:Oh Pancho.
Pancho:Oh Cisco. Have a stick of Wrigley Spearment Gum.

Another jingle that comes to mind is:

I like Bosco, it's so good for me...
I must admit that's all I can remember of the real jingle, but of course kids sang:

I hate Bosco, it's so bad for me.
Mama puts it in my milk to try and poison me.
But I fooled Mama. I put some in her tea.
Now I have no Mama to try and poison me.

I'm not even sure what Bosco was, but I remember that jingle.

How many can remember the Wildroot Cream Oil commercials where Evil Eye Fleagle would say,"Get Wildroot Cream oil Charlie," and the answer would be,"But that would be illegal. My name is Fred."