He was locked in stasis, he had been there for 50 years. Eggman was going to awaken him, but you managed to awaken Shadow before Eggman had the chance. Shadow said this after being awaken. My name is Shadow. Since you were so kind to release me, my master… I will grant you one wish. Behold the true power I possess! I'll be waiting for you in the central control room on the space colony, ARK.