Ultron made him to be his perfect vision of destruction and was sent to gather these minerals: Adamantium, Vibranium, and Captain America's shield. Then the Avengers turned him good but had to be shut down for month, when he woke up the Avengers were under the control of the Purple Man. But Vision helped them escape his control, which he did.
He comes out in some episodes of the Avengers cartoon version not the new movie.
Can travel through walls like a ghost, laser comes out of his crystal in his head, flight and super strength