I know this question sounds silly, but after watching Bunga The Wise something made me think of it...
When Rafiki said that honey badgers are the most intelligent animals in the Pride Lands, Bunga took it as a personal compliment. And not just that, all the other animals at the same moment thought that it relates to him and started calling him Bunga the Wise, and asking for advice. As far as I recall, Rafiki didn't say it relates to Bunga. He was speaking of honey badgers in general.
As far as we know, Bunga was adopted. Could it be that he's not from Pride Lands at all, and that there are none more there? Has anyone else thought of this?