Classic Sonic by Pho3nixSFM on DeviantArt

Classic Sonic (Sonic Forces) - Atrocious Gameplay Wiki

Sonic the Hedgehog (IDW) - Classic Era / Characters - TV Tropes

Classic Sonic Render by bandicootbrawl96 on DeviantArt

Classic Sonic by MegaMotion on Newgrounds

Sonic Forces Sonic The Hedgehog Sonic Classic Collection Shadow The Hedgehog Sega PNG, Clipart, Action Figure

Classic Sonic by sinolonis on Newgrounds

Sonic Origins Is Remastered Classic Sonic Collection, Coming June 23 - GameSpot

Classic Sonic Official Art, HD Png Download , Transparent Png Image - PNGitem

This is how classic sonic should've looked in Sonic Generations (Credits to RafaKnight on Tumblr) : r/SonicTheHedgehog

Classic Sonic Sonic the Hedgehog 2 Render by bandicootbrawl96 on DeviantArt