Modern Classic Hyper Sonic.png - Fan Art & Comics - Sonic Stadium

Character Chronicle: Metal Sonic – Source Gaming

Sonic the Hedgehog / Awesome Music - TV Tropes

Classic Sonic + Super/Hyper Forms! : r/SonicTheHedgehog

Sonic The Hedgehog 2 Classic - Apps on Google Play

Sonic the Hedgehog/Miscellaneous, Sonic Wiki Zone

Espio the Chameleon/History and appearances

Sonic The Hedgehog [32nd Anniversary] by Hunicrio on DeviantArt

Hyper Classic Sonic by MutationFoxy on DeviantArt

Classic sonic drawing.png - Fan Art & Comics - Sonic Stadium

Modern super sonic vs classic hyper Sonic by shadowXcode on DeviantArt

Sonic Advance Trilogy (Video Game) - TV Tropes

Knuckles' Chaotix (Archie) - Sonic Retro

Hyper Sonic (Classic), Fan Fiction

Fan Art & Comics - Sonic Stadium

Rise of Ultraman Comic Book Concept Art Revealed - ORENDS: RANGE (TEMP)