Sonic Z: The Battle Begins

Sonic, Amy, Shadow, and Knuckles must join forces to save the world from Infinite the Jackal.

Walkthrough - IGN

Sonic the Hedgehog: A New Twist

Passionate Sonic Fans Working On Continuation of Sonic SatAM

Sonic the Hedgehog

Sonic X (TV Series 2003–2006) - Episode list - IMDb

Sonic Z: The Battle Begins

Sonic Movie Sequel Scheduled To Start Production In March Next Year

Sonic Frontiers (2022) review. This review was originally published on…, by Alice Michelle Stevens-Dryer

List of Sonic the Hedgehog characters - Wikipedia

VÍDEO Confira o multiplayer de Sonic Superstars

Sonic the Hedgehog 4 (Video Game) - TV Tropes

Looks like the Final Horizon content is an option you're presented with right before the Supreme fight. : r/SonicFrontiers