Shadow the Hedgehog could be coming to Sonic Frontiers, according to hints by the developers - Video Games on Sports Illustrated

Sonic the Hedgehog, Tropedia

Sonic Frontiers – Parry Everything

Why did the cgi cutscene graphics peak in the mid to late 2000s? 😒 it's supposed to get better not worse a decade later lol : r/SonicTheHedgehog

Doctor Eggman Sonic News Network+BreezeWiki

Sonic Frontiers' Tone Could Work for a New Shadow the Hedgehog Game

Sonic The Hedgehog's Modern Design Didn't Come From A Video Game

Sonic The Hedgehog: Every Game In Order With Timeline, and More - History- Computer

Sonic - Video Games on Sports Illustrated

Sonic Frontiers review – wild, weird and a bit broken, Games

Sonic the Hedgehog, Fictional Characters Wiki

Sonic The Hedgehog 2 HD Project (Fan Game) - Is it any good?

Why does SEGA have so many mandates for Sonic? - Quora

Sonic the Hedgehog - Wikipedia

Sonic - Video Games on Sports Illustrated