Black Doom is a fictional character from the Sonic the Hedgehog video game series, specifically introduced in the game Sonic Adventure 2. He is depicted as a powerful and malevolent alien being, known for his dark appearance and abilities. Black Doom serves as the leader of the Black Arms, an alien race that seeks to conquer Earth. In the game, Black Doom manipulates Shadow the Hedgehog, a character with a complex past, to achieve his goals. He is characterized by his desire for chaos and destruction, often clashing with Sonic and his friends. Black Doom's presence adds depth to the storyline, highlighting themes of betrayal and the struggle between good and evil.