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

Classic Sonic's always showing up in Modern Sonic's games, so it's about time Modern Sonic repaid the favor. : r/SonicTheHedgehog

Sonic Mania (Video Game) - TV Tropes

Full Classic Sonic Timeline : r/SonicTheHedgehog

Sophie's Pleasure-Seeking Sonic Deluge - The New York Times

Game Corner: Sonic Generations (Xbox 360) – Dr. K's Waiting Room

Sonic Superstars (Video Game) - TV Tropes

Sonic the Hedgehog, The Codex Wiki

TMNT: Shredder's Revenge blends classic arcade action with modern fun - Polygon

no i will not shut up about sonic