File:London2012 Shadow.png - Sonic Retro

Froggy Sonic News Network+BreezeWiki

Amy - Super Mario Wiki, the Mario encyclopedia

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 Team - Sega Retro

Sonic Generations: A Shift Between Classic Sonic & Modern Sonic – Mother Nature

Silver the Hedgehog - Sonic Retro

Sonic The Hedgehog Metal Sonic / Characters - TV Tropes

Cream the Rabbit, Ultimate Pop Culture Wiki

Sonic and the Black Knight - Sonic Spin-offs - Sonic Stadium