Shadow won't be brought to the Sonic Classic series

Shadow won't be playable in the Classic Sonic the Hedgehog series, and one of the top developers explains why.

Sonic Generations (Video Game) - TV Tropes

Sonic Superstars review

Shadow won't be brought to the Sonic Classic series

Best 'Sonic the Hedgehog' TV Shows, Ranked

Commission - Shadow won't Hesitate by JamesTheReggie on DeviantArt

Sonic Superstars Review (Switch) - Fast, Fun, and Focused Platforming — Too Much Gaming

Takashi Iizuka Says It Again: Shadow Will Not Appear in Classic Sonic Games - Games - Sonic Stadium

Sonic Superstars Preview - Meet Trip, The First New Sonic Character Created By Naoto Ohshima In Decades - Game Informer

Who or what is Shadow the Hedgehog? Dr. Eggman discovers the secret lab of Professor Gerald, his grandfather. By freeing the sleeping Shadow creature,

Sonic X - Project Shadow v.8 [DVD]