Maybe Urkle will make an appearance during Ronda's story as your rival or something. "Did I do that?" XD But yeah, that would be perfect, some 'happy little anything'.
P&F was well after my time too, but a friend of mine's daughter used to watch it, and he told me about it. It's a fun show, the guys who created it worked on shows like the Simpsons, Family Guy, and more. They also did a unique song for every episode, so that was also fun too. Their idea was to make a show, not for kids, but one that kids could watch.
Ronda was the daughter of the cop, the girl that Urkel was lusting after in the show IIRC.
That is a good question, though it depends on how loosely you look at it.
Obviously, we have the three I mentioned, plus two of the TRumps and Clinton, recently he added Kim, the leader of North Korea, Sploosh is a guy who works on the game. Then you have the game parodies, Leisure Suit Harold, FailOut3, and NeverLife3, and the movie Dirty Harold (not sure if the other two movies are parodies or what).
Anyone know of any others?