Yu Yu Hakusho: Ghost Files (19921995)
After a teenage delinquent is killed while saving a childs life from an approaching car, the rulers of the underworld send him back to become an Underworld Detective investigating demons apparitions in the human world
Akira (1988)
A secret military project endangers Neo Tokyo when it turns a biker gang member into a rampaging psychic psychopath who can only be stopped by a teenager, his gang of biker friends and a group of psychics