Sonic The Hedgehog's 30th Anniversary and Super Mario 64's 25th Anniversary! : Free Download, Borrow, and Streaming : Internet Archive

Yesterday marked the 30th anniversary of Sonic the Hedgehog, Sega

Sonic the Hedgehog 3 (Genesis) : SEGA : Free Download, Borrow, and Streaming : Internet Archive

Adventures of Sonic the Hedgehog 30th Anniversary by ToonGamer23 on DeviantArt

Fantom Comics

[SHC 2021] Sonic the Hedgehog 2 Anniversary Edition : SophieDude : Free Download, Borrow, and Streaming : Internet Archive

First 4 Figures Announces Sonic The Hedgehog 30th Anniversary Statue

Steam Workshop::yeah :v (moila)

Happy 30th Anniversary Adventures Of Sonic! by Ptbf2002 on DeviantArt

Sonic Triple Trouble SMS (Master System) : Glitch : Free Download, Borrow, and Streaming : Internet Archive

Mario Vs. Sonic : Randy Solem : Free Download, Borrow, and Streaming : Internet Archive

PDF) Mario's legacy and Sonic's heritage: Replays and refunds of console gaming history

Reviews Polygons and Pixels

Was Sonic ever considered more popular than Mario? - Quora

Sonic 1 Megamix : Team Megamix : Free Download, Borrow, and Streaming : Internet Archive