Concept art i made for Darkspine Sonic.(items and stats in the comments) : r/SonicForces

Darkspine Sonic [Sonic Forces] [Works In Progress]

Steam Workshop::Sonic Forces: Tails and Super Sonic V4 and V3

Sonic Forces (PC) Mod Part 55_ Darkspine Sonic vs Metal Sonic

Tracy Yardley's artwork of Darkspine Sonic! : r/SonicTheHedgehog

Super transformation, Sonic Wiki Zone

Sonic Forces: Speed Battle

How powerful is Infinite (Sonic Games)? - Quora

Sonic the Hedgehog (Canon, The Universe)/Adamjensen2030

Cyber Sonic (concept art). Heard this theory going around about

How powerful is Sonic? - Quora

Sonic Forces: Speed Battle, Old vs New Part 4

How powerful is Sonic the Hedgehog? - Quora

Sonic the Hedgehog - Wikipedia

If there were a form of Sonic that included all previous forms

Steam Workshop::[WOTC] Sonic Cosmetics: Mobians