File:London2012 Shadow.png - Sonic Retro

File:London2012 Sonic.png - Sonic Retro

File:Sonicchannel shadow.png - Sonic Retro

Category:Artwork of Shadow the Hedgehog - Sonic Retro

Sonic and the Secret Rings - Sonic Spin-offs - Sonic Stadium

Shadow (character) - Super Mario Wiki, the Mario encyclopedia

Amy Rose Sonic News Network+BreezeWiki

Sonic the Hedgehog CD (Sega CD) - The Cutting Room Floor

File:London2012 Luigi.png - Sonic Retro

Shadow the Hedgehog in Sonic the Hedgehog - Sonic Retro

Mario & Sonic at the London 2012 Olympic Games (Nintendo 3DS) - Super Mario Wiki, the Mario encyclopedia

Category:Artwork of Shadow the Hedgehog - Sonic Retro

Personaggi di Sonic the Hedgehog - Wikipedia

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

Amy - Super Mario Wiki, the Mario encyclopedia

Sonic Party Video Games