Shadow confirmed as Sonic Generations rival - Gematsu

Shadow the Hedgehog, first introduced in Sonic Adventure 2 for Dreamcast, will come to Sonic Generations this fall as one of the blue hedgehog’s rival characters.

Character Chronicle: Greninja – Source Gaming

Sonic Generations - Shadow - Rival Battle (Hard Mode/S-Rank/No Hit/Skill)

RK128 – Page 4 – Robert Kellett – Retrospectives of Gaming History

ZombiePie's profile - Blogs

Sonic Mania, Sonic Wiki Zone

Sonic Generations: Shadow screenshots - Gematsu

Shadow to Rival Sonic in Generations

Music of Sonic the Hedgehog - Wikipedia

Sonic Generations - Shadow vs Sonic(Also change HUD)

Sonic the Hedgehog - Wikipedia

The Graveyard: Disconfirmed Character Thread (SAKURAAAAAAAAAI!)

Sonic The Hedgehog - A Little Ball of Energy in an Extremely Handsome Package

VS. Shadow - Sonic Generations - Gallery - Sonic SCANF

Do you think the Shadow the Hedgehog fought in Generations is the same Shadow helping Sonic throughout the games? : r/SonicTheHedgehog