sonic the hedgehog, shahra, and darkspine sonic (sonic and 1 more

What is Sonic's most powerful form? - Quora

Character Mods

I honestly wish this form was use a tiny bit more and I don't care anyone says it's canon (to me) : r/SonicTheHedgehog

i'm ready to bloom — What We Get Wrong About Dark Sonic

Sonic the Hedgehog (Sonic Prime)

Sonic the Hedgehog (IDW)

Review: Sonic and the Secret Rings (Wii) - Geeks Under Grace

Sonic the Hedgehog, Wiki

Sonic Dash - DARKSPINE SONIC New Character Update - 65 Characters Unlocked Collect Tokens Gameplay

Which Sonic is the Most Powerful Sonic?, by Ghoumy

Sonic and the Secret Rings - Wikipedia

Barry Allen (Composite) vs Sonic the Hedgehog (Composite) - Battles - Comic Vine

Darkspine Sonic - DrawingNow

Darkspine Sonic Papercraft by augustelos on DeviantArt