

Shadow agreed as he was seeking revenge for the death of his only friend Maria Robotnik, who was killed when the military attacked the Ark. 50 years later, Eggman released Shadow, believing him to be a top-secret weapon, and convinced him to help with his plans for world domination.

Gerald was funded by the military, but soon after Shadow's creation, they cancelled the research and shut down the Ark, citing that a horrible accident had occurred, but in reality, the military attacked the Ark and captured Shadow. He was created by Doctor Eggman's grandfather Professor Gerald Robotnik on-board the space research station known as the Space Colony ARK.

Shadow is an anthropomorphic hedgehog who was created artificially to be the "Ultimate Life Form".
