I find the lack of rivalry with Sonic very interesting. After realizing that Sonic is not out to steal the Emeralds, Knuckles seems to become a full-fledged ally, with no hint of a rivalry. And giving him a voice to make him sound more like one of Sonic's contemporaries was an interesting move, too.
He's quite different from any other Knuckles, I think. I always imagined Knuckles' personality being the closest to the Archie comics' version, since that was what I grew up with. He was such a wise guy in those first appearances!
One thing I really don't like about the Sonic Underground Knuckles is his sadism. I mean, he was pretty much roasting Sleet and Dingo and going to feed them to his pet dinosaur. **headdesk.** That is really not something I want to see from Knuckles!















