Sonic shows up in SEGA’s Model 3 arcade board Brawler SpikeOut as a statue, along with art of him across the Astro Mall stage’s walls; however, one of the pieces is quite interesting.
The art in general is quite odd (there’s a piece by Ohshima, Sonic’s creator), but these are perhaps the most interesting pieces.
They’re shaded in the Adventure style, and even have green eyes! Yes, official Classic Sonic art where he has green eyes. Hot damn.