What the heck is Darkspine Sonic?

I had a random thought about Darkspine Sonic and I wanted to dig a little deeper. Strangely enough, information on how this form was created is limited. No

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Which of sonic forms is stronger: Dark Super Sonic, Fleetway Super Sonic, Hyper Sonic, and Ultra Sonic (rank them weakest to strongest)? - Quora

The Unofficial Evolution of Darkspine Sonic in Sonic Games

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Darkspine Sonic

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Darkspine Sonic in all his glory, Sonic the Hedgehog

Hyper Sonic Just Got Referenced For The First Time Outside Of Sonic 3

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Darkspine Sonic, Ultimate Pop Culture Wiki