File:Metal Sonic Rivals 2.png - Sonic Retro

Sonic Superstars (Video Game) - TV Tropes

What was your first introduction to the Sonic Franchise? : r/SonicTheHedgehog

New Chronology - Chao Island

List of Sonic the Hedgehog characters - Wikipedia

Sonic Rivals 2/Gallery, Sonic Wiki Zone

Due to the lack of a proper timeline in the Sonic Encyclo-Speed-ia, I decided to make my own. Second image contains my notes, reasonings, and conjectures. : r/SonicTheHedgehog

Sonic Generations Metal Sonic Sonic Free Riders Sonic Rivals 2, sonic the hedgehog, sonic The Hedgehog, sonic Generations, sonic Rivals png

Jet (Sonic the Hedgehog) - Super Mario Wiki, the Mario encyclopedia

File:Metal Sonic Rivals 2.png - Sonic Retro

Steam Workshop::Mecha Rivals of Aether collection