Oh wow I just noticed. Ernie Sabella must be the only original actor to still reprise his character in every "TLK" film/TV/video game work. "TLK 2019" seems to be all about the new cast with the exception of James Earl Jones. Funny how Seth Rogen tried to channel Ernie voice-wise while infusing his own style of humor.
I had the chance to look up earlier "Timon and Pumbaa" episodes on Youtube. While definitely not canon, it was a celebratory show about their friendship, and some episodes did show Timon and Pumbaa's character growth especially after they fought over something. Usually Timon was at fault. Eg. "Yukon Con" when he got jealous of Pumbaa getting all the gold and got tricked into stealing it by the villain but then he realized his mistake and tried to make it up to Pumbaa who felt really betrayed.