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.

The Destiny's Unknown — Sonic Generations - Shadow Rival Battle & Perfect

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

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Sonic Generations: Shadow screenshots - Gematsu

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General thread for gaming news that doesn't deserve its own thread. [Archive] - Forums

Sega launches Sonic 2020 initiative to announce Sonic the Hedgehog news on the 20th of every month : r/Games

Sonic Generations Rival Shadow Battle(Fake) by facundogomez on DeviantArt

Silver a rival in Sonic Generations - Gematsu