White Baby

The White Baby is the final boss of Metal Slug 1X0, she first appeared on Metal Slug Attack as a Playable unit, she's the project that Amadeus has been working for so long.

Profile
This prototype computer virus created by Amadeus finally makes itself known to the world. White Baby has doubts about the organization orders, and acts only on her own decisions and for her own goals.

Story
Metal Slug 4

Although she doesn't make a physical appearance, she's mentioned as the definitive project of Amadeus Syndicate

Metal Slug 8 (Lord Moogoo)

An upgraded version of the White Baby Virus was created by the resurgence of the Amadeus Syndicate. Using temporal time rifts across different timelines, Amadeus (as an AI in his computer) was able to enhance the white baby virus with Abigail's assistance to create a powerful satellite cannon capable of mindwiping all the Earth's inhabitants with a more potent form of the virus. As the space cannon was destroyed, the White Baby mother computer was destroyed, wiping out the virus.

Metal Slug 1X0

After Morden and Amadeus' defeat on Final Mission, Amadeus wake up her as his final attempt to destroy Marco & co. but she decided to don't obey her creator and kill him instead alongside all Regular and Rebel Army Soldiers around the base.

When they though she has been defeated and destroyed, she reapperas grabbing MS-Alice from her Twin-Tails to absorb her vital energy and become much stronger, White Baby transforms from Prototype to Definitive having now an adult appearance.

As her final trap card, she fuses with VITA's remaining pieces to become a computer virus named White Baby Ver.VITA, controlling every computer from the base, unfortunately, Marco & co. managed to kill her causing the base's self-destruction, White Baby is finally dead.