Comparison of the 3 Knuckles models, for Sonic's upcoming 30th anniversary.
Modern Knuckles model made by SEGA.
Classic Knuckles and Dreamcast Knuckles model made by me.

https://www.deviantart.com/bandicootbrawl96/art/3-Eras-of-Knuckles-Models-Comparison-5-10-21-879107856