*Black Doom is a character that appears in the Sonic the Hedgehog series. He is the sinister patriarch of the Black Arms. For thousands of years, Doom planned to impose terror on the Earth and use the local human population as a livestock for his kind. Ultimately, however, he met his defeat at the hands of Shadow the Hedgehog, his own offspring.

At least two thousand years ago, Black Doom created the Black Arms legion. For millennia, he and his army made several visits to Earth. While the effects of their appearances on the planet's history are uncertain, it is known that they would transport bird-shaped flying temples to some areas on the earth to terrorize the local population.

While the Black Arms were planning to conquer earth, they were unable to do so since their home, the Black Comet, was unable to enter a planet's atmosphere. However, fifty years ago, Black Doom formed a sort of alliance with Professor Gerald Robotnik. The two created the Ultimate Lifeform, Shadow the Hedgehog, in order to expand Robotnik's research and help the alien retrieve the seven Chaos Emeralds.

The resulting creature was created from Doom's blood, giving him access to his Chaos Control abilities. However, the professor realized the threat his new alliance presented to earth and secretly planned to use the black hedgehog and the newly built Eclipse Cannon to destroy the Black Comet when it made its next regular fifty year visit.

Soon after the events detailed in the Space Colony ARK incident occurred, Gerald's initial plan was forgotten as he sunk into grief and madness after his granddaughter, Maria Robotnik, died during the raid on the ARK to shut down Project Shadow by GUN.

In Shadow the Hedgehog, when the Black Comet returned to Earth, Black Doom and his army made a full-scale attack on the planet, ravaging various cities around the world and causing severe damage and casualties.The alien overlord later appeared before Shadow and ordered him to collect the seven Chaos Emeralds and bring them to him.*