Eggman Empire (formerly) Team Dark, Freedom Fighters
Mario and Sonic at the Olympic Winter Games
E-123 Omega is a recurring character in the Sonic the Hedgehog series. Originally working for his creator, Dr. Eggman, he betrayed the doctor when he was locked away. He appeals as a helpful ally to Shadow the Hedgehog and Rouge the Bat, and bears a strong resemblance to another robot in the E-100 series, E-102 Gamma. He can fire various weapons like missiles and machine guns, and ever since the introduction of Sonic Heroes, has a driven dislike for Dr. Eggman.