E-123 Omega

E-123 Omega (オメガ Omega?), or, technically, E-123 Ω, is a fictional robot from the Sonic the Hedgehog video game universe, first appearing as a fully playable character in the multiplatform game Sonic Heroes, which was first released in Japan on December 30th, 2003. He was the latest creation who has to get revenge on for sealing him in room. Suddenly, he team up with Shadow the Hedgehog and Rouge the Bat to take Eggman.