Editing Sonic the Hedgehog 4: Episode III (lost build of cancelled

New Sonic game prototypes found by drx, shows early stages from Sonic CD, more to come

Editing SegaSonic the Hedgehog (lost build of cancelled 32X port of arcade platformer; existence unconfirmed; 1994) - The Lost Media Wiki

Could Sonic's Movie Redesign Be a Bad Idea? - Cheat Code Central

Editing Sonic The Hedgehog 3 & Knuckles (lost build of cancelled iOS port of Sega Genesis platformers; 2014) - The Lost Media Wiki

Editing Super Sonic (lost build of cancelled Sega CD port of Sega Genesis platformer Sonic the Hedgehog 2; existence unconfirmed; 1992-1993) - The Lost Media Wiki

Sonic 4 Episode III - Title Screen (Remade)

Editing Super Sonic (lost build of cancelled Sega CD port of Sega Genesis platformer Sonic the Hedgehog 2; existence unconfirmed; 1992-1993) - The Lost Media Wiki

Editing Super Sonic (lost build of cancelled Sega CD port of Sega Genesis platformer Sonic the Hedgehog 2; existence unconfirmed; 1992-1993) - The Lost Media Wiki

Sonic the Hedgehog: The Movie, Sonic Wiki Zone

Sonic Advance 3, Ultimate Pop Culture Wiki

4 CANCELLED Sonic The Hedgehog Movies (Lost Sonic Film Adaptations)

Sonic for Hire (Web Animation) - TV Tropes

The Dark Reason The Original Sonic 4 Was Cancelled

Sonic the Hedgehog (IDW) (Comic Book) - TV Tropes

Sonic Reclassified (Video Game) - TV Tropes