Only Sonic and his friends are heroic enough to put a stop to Dr. Eggman and is on the verge of becoming the ultimate monster using the 7 Chaos Emeralds. Eggman and is on the verge of becoming the ultimate…Īn ancient evil lurking within the Master Emerald has been unleashed from its slumber by the devious Dr. Sonic Adventure DX – An ancient evil lurking within the Master Emerald has been unleashed from its slumber by the devious Dr.