Adam Tennyson is the twin brother of Ben Tennyson from Dimension 10. He created the Omniwatch, a powerful watch-like device that allows him to turn into different aliens.
Adam was shown to be less immature and behaves far less recklessly than Ben Tennyson, and shown to think ahead of his enemies. Although, he still possesses some arrogant.
Adam wears a black shirt, black pants and a black hooded jacket with green stripes on both arms and the number 10 on the right side, and black shoes. He wears the Omnitrix on his left wrist.
Powers and Abilities
Adam possesses the Omniwatch that allows him to transform into any of his aliens at will, due to having unlocked the Master Control. He is a very good fighter and has a large amount of knowledge about the Omnitrix.