Ever since the reveal of Sonic Boom a little while back, one of the main discussions has been the new character designs, especially with Knuckles. However, for those that aren’t fans of them, they were at one point much more extreme according to Big Red Button Entertainment’s CEO Bob Rafei
Early on, when we had our first review of all the crazy things we wanted to try, Iizuka-san came down to Los Angeles and looked through all the different concepts. I felt sorry for the guy because sometimes he couldn’t actually look at the screen … it was too traumatic seeing all the crazy stuff we wanted to do.
These extreme changes included fur and scales that would have made the character look more “alien” and not Sonic-like.