FANDOM


Prison island is a large jungle island used as a prison & research base by GUN. Dr. Eggman came here to find the Military's top secret weapon, which was Shadow the Hedgehog. Later when Sonic was captured by GUN, he was imprisoned deep within the island. Eggman returned here with Shadow & Rouge to seize the 3 chaos emeralds, while Tails & Amy attempted to free Sonic.