E-123 Omega

Quest for revenge
Omega is the 24th and last of Doctor Eggman's E-100 series robots. He was designed by Eggman to prevent the release of Shadow the Hedgehog, and, in case he failed to control Shadow when he is freed. To accomplish this, Eggman sealed him in an abandoned base with Shadow. Being imprisoned infuriated Omega; he decided to prove his status as the most powerful E-Series robot by abandoning his original programming and taking revenge on his creator and the other machines he built.

When Rouge the Bat went looking for Eggman's secret treasure in his base, she accidentally reactivated E-123 Omega when she released Shadow from a stasis pod. Mistaking Shadow for an Eggman robot and following his new mission, Omega attempted to take out the hedgehog. However, Rouge broke up the fighting long enough to hear both their stories. He soon teamed up with Rouge and Shadow as the power member of Team Dark.

After Omega and his team finally defeat Eggman (Metal Sonic in disguise). Omega then sets about destroying Eggman's Shadow Androids. Later, Omega teams up with the other teams against the Metal Overlord. Omega is last seen during that event with Shadow exchanging looks with him and holding Metal Sonic's deactivated body in his arms.

Continuing quest for revenge
Omega assists Shadow in the Hero missions of the "Iron Jungle" and "Lava Shelter" stages by teaming up to destroy Eggman's robots, and helps him battle the "Egg Breaker" and "Egg Dealer" bosses following those stages.

Journey to the future
Upon being sent to the future by Mephiles the Dark, Shadow and Rouge notice Omega in stand-by mode in the "Crisis City" stage. Rouge later goes back to the present alone, where she finds Omega in the Tropical Jungle Zone for unknown reasons, though judging by the throngs of Eggman's robots it can believed Omega was trying to destroy them. Rouge programs him to help Shadow out in the future, in which Omega goes into stand-by mode until the point in the future when Shadow is in trouble. He then wakes up in the future and helps Shadow in a fight against Mephiles, and Shadow and Omega go back to the present. Later on in the game, Mephiles teases Omega by saying that Omega was clearly made to capture Shadow. Angered by this, Omega proceeded to unload his cannons on Mephiles, temporarily defeating him in the process. Omega then reveals somewhat sadly, that he is the one who captured Shadow in the future due to humanity's fear of him. However, it is currently unknown if the erasing of Iblis from history canceled this future event, as it was Shadow whom the world used as a scapegoat for Iblis' destruction. He is playable in the Boss Battle against Mephiles, Wave Ocean, Dusty Desert and the End of the World stages. He is also playable in the downloadable Very Hard Mission and challenges of Shadow's levels. Including Kingdom Valley, Crisis City, Flame Core, Radical Train, Aquatic Base, Dusty Desert and the boss level against the Egg Genesis in White Acopolis.

Assistance against the Marauders
Omega went to Eggman's city of Metropolis to destroy any robots he could find, but he found the Nocturnus instead. The Marauders had reprogrammed Eggman's old robots to serve them and had sent them to take Omega apart after he had to retreat into a room in north-west Metropolis. The robots were successful, but Shadow was worried about Omega and went in search of him. Shadow then teamed up with Sonic and co. to help find Omega. Omega was found and repaired by Tails, much to the disapproval of Eggman. When Omega saw Eggman, he was going to attack him, but Tails told him that they'd joined forces with Eggman. At first Omega thought Tails had gone mad and suggested destroying him, but Shadow and Rouge confirmed this for Omega. Trusting his friends more than Tails, Omega teams up with Sonic after recharging himself.Sonic Chronicles: The Dark Brotherhood [After they enter the room with Omega inside.] '''Shadow the Hedgehog: Wait! That's Omega! I knew it! Those Marauder goons. We have to-- [Robots enter.] Miles "Tails" Prower: Later! Someone's coming! Shadow: Good. I need to smash something. [...] Shadow: Omega! Doctor Eggman: Oh, don't waste your time on this one. He's been a thorn in my side for years! Shadow: Quiet, Eggman, or I promise you I'll-- Tails: He's still functioning! Just heavily damaged. But I think I can... Yes! With the parts from those guardian robots, I can repair him! Shadow: Do it. [...] Shadow: Omega! Can you hear me? E-123 Omega: SYSTEMS COMING ONLINE -- E-123 OMEGA BEGINNING REACTIVATION PROTOCOL. Rouge the Bat: If I had a nickel for every time I heard that... E-123 Omega: EGGMAN DETECTED. BEGINNING ANNIHILATION SEQUENCE. Tails: No! Omega, Eggman is on our side! E-123 Omega: ORANGE FOREST CREATURE HAS GONE MAD. RECOMMEND IMMEDIATE DESTRUCTION. Shadow: No, Omega. He's right. Eggman is helping Team Sonic against the Marauders. Rouge:As hard as it is to believe. E-123 Omega: THERE IS NO REASON TO DOUBT SHADOW OR ROUGE. THERE IS NO REASON TO TRUST THE REST OF THESE MEATBAGS. Tails: What happened to you, Omega? E-123 Omega: I CAME HERE TO DESTROY ALL OTHER EGGMAN ROBOTS. BUT I WAS SURROUNDED BY STRANGE CREATURES AND FORCED TO FLEE. THE COWARDS FOLLOWED ME. THEY MADE THEIR ROBOTS DISMANTLE ME WHILE I WAS HELPLESS. DISASSEMBLED BY INFERIOR MACHINES. IT WAS EMBARRASING. Shadow: Come with us, Omega. We're going to destroy the Marauders for what they did to you. E-123 Omega: YES. THEY WILL BE DESTROYED FOR WHAT THEY DID TO ME. Rouge: Ugh. Again with the emotionless revenge. It just gets tired. Tails: Let's go, team! Eggman: Yes. We have much work to do! E-123 Omega: I MUST TAKE TIME TO RECHARGE BEFORE COMMENCING REVENGE. Shadow: The stronghold in the Underground, Omega. You can recharge there. Eggman: I never agreed to allow that faulty machine to-- Shadow: Silence, Eggman. Now. E-123 Omega: I WILL GO TO THE UNDERGROUND TO RECHARGE. YOU WILL FIND ME THERE IF YOU NEED ME. Shadow: We'll get the Marauders for what they did to you, my friend. Let's get to it. The Marauders must pay.