DNA Ressurection

DNA Resurrection is a process through which a scientist brings a Reploid back from the dead. By putting the vital parts of a Reploid in a new body, their DNA programs would take control over the changed parts.

History
As part of "Project:Lazarus", kids were kidnapped, killed (by redirecting the synaptic impulses from the autonomic functions and turning their brains in self-sufficient organs) and turned into bio-computers (via the brains). Drs. Light and Wily stole one of the brains to use as evidence to prove the inhumanity of the project. After the project was declared illegal, Dr. Light, feeling sorry for the girl the brain belonged to, used the girl's brain patterns to create Roll, in an attempt to adopt the girl, erasing the girl's memories to ease the pain she went through. (Although it proved ineffective, as Metallix used Chaos Energy on Roll to bring back her past. Despite this fact, she decided to believe that Metallix was lying, despite the fact Dr. Koopa told the story to X and Zero, who promised to keep it a secret, as well.) This, alongside "Project:Lazarus", can be considered to be a precursor to the DNA Resurrection due to the revival of humans as robots, albeit Roll's creation is closer, as she only lost her memories, and not her personality.

After the Reploids were created after Megaman X's design, it is discovered that, unlike humans, reviving Reploids is possible. However, it was prohibited due to keep humans and Reploids as equals. After the Repliforce War, however, the illegality of the DNA Resurrection enraged the gods, according to The Merger Magikoopa, due to everyone hearing about Zero and Iris' tragic love story, but no mortal doing anything about it. After the Xorda attack, there were no more scientists to do DNA Resurrections for 12'000 years, until Bowser Jr. resurrected Sonic Man as Metal Sonic.

Millions of Reploids were resurrected in the First Robotnik War: Elec Man, Fire Man, Pharaoh Man, X, Zero, Axl, Signas, Douglas, Alia and, after Dr. Koopa betrayed X and Zero, the Colonel were revived by Dr. Koopa due to feeling that Mario would return, while almost all the others were resurrected by Dr. Robotnik as NEO Mavericks. Roll and Quake Woman, however, tried betraying him, causing them to be imprisoned. Rock and Blues were saved from Robotnik's control by Roll. Afterwards, Dr. Koopa resurrected the Repliforce, including Iris. After this giant wave of DNA Resurrections ended alongside the First Robotnik War, DNA Resurrections were no more practiced, due to Reploids being more than capable to overpower Dr. Robotnik's Badniks without getting a single scratch.