Sonic The Hedgehog - Tikal's handy guide for first-time Chaos

You know? Sometimes I just wonder, how can Sonic think in something so smart? His reasoning is really great here. : r/SonicTheHedgehog

Sonic Adventure 2 (Video Game) - TV Tropes

Chao, Sonic Wiki Zone

Sonic: Nazo Unleashed (TV Series 2006–2007) - IMDb

Franchise Festival #86: Sonic the Hedgehog (1998-2007) – The Avocado

How Fleetway Played The Games, Part 10: Of Prosecutors and Goodbyes - Sonic Retro

Knuckles the Echidna/History and appearances

Sonic the Hedgehog (Sonic the Comic), Sonic Wiki Zone

How powerful is Sonic the Hedgehog? - Quora