Dark Sonic - The Hidden - Dark Sonic - The Hidden Form

Turbos Blog - DARK SONIC'S FATE

Dark Spine Sonic Sonic, Sonic dash, Sonic fan characters

Sonic the Hedgehog: Triple Trouble 16-Bit (Video Game) - TV Tropes

All of Sonic's Transformations.

Sonic 2 ending explained: Project Shadow, Super Sonic, and is Robotnic Dead?

Sonic the Hedgehog 2 Easter Eggs and Reference Guide

While not a fan-favorite, Sonic and The Black Knight has what I belive to be the most balanced and nuanced characterization of Sonic we've ever gotten. : r/SonicTheHedgehog

How would Canon Sonic and his friends react to secret history Sonic and Tails? - Quora

Sonic.exe Know Your Meme

Sonic vs. Sonic! A Dark Tale Begins! by Swagboy567 on DeviantArt