File:Metal Sonic Rivals 2.png - Sonic Retro

Sonic Generations (Video Game) - TV Tropes

Sonic Rivals 2/Gallery, Sonic Wiki Zone

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 Rivals 2/Gallery, Sonic Wiki Zone

Metal Sonic - Sonic Retro

PSP - Sonic Rivals 2 - Metal Sonic - The Models Resource

Metal Sonic, Sonic Wiki Zone

Sonic the Hedgehog - Eggman Empire / Characters - TV Tropes

Sonic Rivals 2/Gallery, Sonic Wiki Zone

Sonic Rivals 2/Gallery, Sonic Wiki Zone

Sonic Rivals 2 - Wikipedia

Sonic Rivals 2, Sonic Art Assets DVD Wiki