Was there a cartoon episode whether it be Bush or Family Guy where were little Bill Multiplying and only saying Rudy Theo Pudding?

There is no known cartoon episode, whether it be from "The Simpsons" or "Family Guy," where a character, particularly a young version of Bill, multiplies and says "Rudy Theo Pudding." This scenario seems to be a fictional or imagined scenario.

It's possible that this is a misremembered or made-up scenario, or perhaps you are thinking of a different cartoon or media altogether.

If you can provide any more details about the cartoon or the context of this scenario, I might be able to help you identify it.