Sonic Generations - Classic, Modern and Boom by ClariceElizabeth on DeviantArt

Sonic The Hedgehog 2 Classic - Apps on Google Play

Tails (Sonic the Hedgehog) - Wikipedia

The Evolution of Sonic the Hedgehog

The fact that Classic Sonic is older than Modern Sonic, isn't a problem anymore, since they're considered different people now : r/SonicTheHedgehog

Classic Sonic Characters Bios by BrightStar40k on DeviantArt

Sonic The Hedgehog Classic Action Figure- 4- RAY

281960 - safe, artist:trueretrosonic, classic sonic, sonic the hedgehog ( sonic), hedgehog, mammal, sega, sonic the hedgehog (series), comparison, male, multeity, solo, solo male - Furbooru

The best 12 Sonic the Hedgehog games, ranked - Polygon

Wait, so is classic Sonic and modern Sonic from a different timeline now?

Review: Sonic Origins is a tragic example of good classics ruined by greed