
Shadow discovers that he has amnesia and cannot remember anything before his release (aside from his name and brief images of Maria Robotnik's death). As she activates the capsule, E-123 Omega begins to attack the newly awakened Shadow, believing him to be an android. In Sonic Heroes, Rouge discovers Shadow in a stasis tube located in the deepest part of one of Dr. Afterward, Shadow fell to the earth and was presumed dead. Then, as Super Sonic and Super Shadow, they destroyed the Biolizard (the Ultimate Life form prototype), having become a monster code-named Finalhazard, and using their pooled energies, executed an enhanced Chaos Control which stopped the fall. But the Biolizard, being the prototype of Project Shadow, used Chaos Control to fuse with the ARK, continuing its fall.

After Shadow defeated it, Knuckles used the Master Emerald to stop the Chaos emeralds. Notably, a scene from Gerald Robotnik's diary appeared. Meanwhile, Sonic and Knuckles had reached the Central Core, where they reactivated the Biolizard. Gerald Robotnik then revealed that he had made this function to have revenge for Maria, and that the ARK would destroy the Earth.

In Last story, Eggman inserts the final Chaos Emerald, only to initiate a destabilization program on the ARK. In a twist of fate, Shadow ultimately aided Sonic when realizing Maria's true wish with the help of Amy Rose, which was to save humanity. Eggman, blowing up half of the moon in demonstration. To achieve this, Shadow revealed the Eclipse Cannon to Dr. In exchange, Shadow agreed to aid the doctor in his plans to take over the world holding his true intentions as wishing to get revenge for the death of his friend, Maria Robotnik. base on Prison Island, where he had spent 50 years imprisoned. Shadow debuted in the game Sonic Adventure 2 as one of three playable "dark" or "villainous" characters, alongside Rouge the Bat (who also debuted in this game) and Doctor Eggman.

According to an official poll, Shadow is the second most popular character in the series, second only to Sonic himself. So overall, Shadow could be considered a die-hard hero. However, he does what he needs to do to accomplish what he knows to be right. Though lately, he has done absolutely no evil, only good, making him a hero. In contrast to Sonic, Shadow is typically portrayed as a tortured anti-hero, or a renegade who can just as easily serve the forces of evil as those of good. His past was almost a complete mystery until the game Shadow the Hedgehog revealed the events surrounding his creation. Since his debut, Shadow has appeared in a multitude of games, television shows, and comic books. Created as "The Ultimate Life Form" by Professor Gerald Robotnik, Shadow is indestructible, however that doesn't mean that he does not feel pain. Shadow the Hedgehog is an anti hero and the arch rival of Sonic the Hedgehog.
