Bedlam in Paradise (1955)

Shemp dies but cannot get into heaven until he reforms Moe and Larry. He returns to earth as an invisible spirit and sets out to prevent the other two stooges, who are in league with the devil, from selling a phony invention (a fountain pen that writes under whip cream) to a rich couple. Shemp sabotages Moe and Larry' plans and makes it through the pearly gates.