Exclusive: I found an unused Knuckles render in the official Sonic movie sequel poster. Here's how it happened. - Tails' Channel

An archivist shares exclusive details about how he was the first person to obtain a Sonic movie promotional package.

Sonic The Hedgehog 2: Three New Character Posters Revealed - IGN

Exclusive: I found an unused Knuckles render in the official Sonic movie sequel poster. Here's how it happened. - Tails' Channel

Could the Sonic movie start a cinematic universe? - Quora

Which is better, the old Sonic the Hedgehog movie or the 2020 new Sonic movie? - Quora

Knuckles (TV series), Sonic Wiki Zone

Why the Cinematic Sonic the Hedgehog is Making Fans Blue, by Matthew Koester

Sonic The Hedgehog 2 Poster Art Replaces Tails With Stoned Fox Meme

Sonic the Hedgehog 3 and spinoff show are officially in the works

Sonic, Tails and Knuckles get new Sonic the Hedgehog 2 character posters

My daughter went to a birthday party. Other than Sonic, Tails and Knuckles I have no clue who these new characters are. Any help?!? : r/SonicTheHedgehog

Sonic the Hedgehog Movie: Easter Eggs and Reference Guide

Sonic the Hedgehog 2 Character Posters Released

Sonic Adventure (Video Game) - TV Tropes