Cloak & Dagger (1984)

11-year-old Davey's mother is dead and his father doesn't spend nearly enough time with him. So the boy loses himself in video games--and even has an imaginary friend, a super-resourceful secret agent. When he accidentally comes into possession of a spy group's secret plans, and winds up on the run from them, he must learn to rely on himself and his imaginary pal to save his skin.