How Iizuka feels about Hyper Sonic : r/SonicTheHedgehog

The History of Sonic the Hedgehog: The Modern Era - LevelSkip

Sonic The Hedgehog: Most Up-to-Date Encyclopedia, News & Reviews

Sonic Frontiers review - new open zone direction still constrained by old flaws

Hyper Sonic, Sonic Wiki Zone

Takashi Iizuka on why we don't see Hyper Sonic in anymore games - Sonic Discussion - NewSuperChris

The extraordinary fan-game roots of Sonic Mania - GameCrash

Base Sonic speed Downgrade

Sonic the Hedgehog, Heroes Wiki

Sonic Frontiers review - new open zone direction still constrained by old flaws

Sonic Frontiers intentionally reuses levels from previous games

The Hotdog Laserhouse

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

Sonic Frontiers' Sole Playable Character Is Sonic; Takashi Iizuka Briefly Comments On Projects Post-Frontiers - Noisy Pixel

Sonic The Hedgehog Heroes Sonic The Hedgehog / Sandbox - TV Tropes

Original the Character: Do Not Kill: PRELUDE! by JJSliderman on DeviantArt