I swear each issue of Shazam! gets worse than the one before it. Same pattern as always for issue 5 (Sept 73), Three stories, two new ones by Beck, and a much better reprint tale, in this case a Captain Marvel Jr one. Maggin scripts both of the new stories.
The cover tale involves a leprechaun, so you know right off the bat it's going to be terrible. A bum grabs the leprechaun, and asks for the power to be invisible.
He starts stealing money, and Captain Marvel gets involved. Marvel also spots the leprechaun, and manages to grab him as Billy Batson. Since the leprechaun cannot undo a wish, Marvel torments the invisible hood so much he grabs the leprechaun again (which was Batson's wish, to allow him to do this), and asks to be visible.
The second story brings back Sunny Sparkle, the boy everyone loves. Everyone except me. I could easily have gone without ever seeing this character again.
The one part of the story I enjoy is the cameo by Archie and Edith Bunker, from the tv show All in the Family. Sunny winning Archie over is kind of funny.
Most of the story deals with Sunny's obnoxious cousin, Rowdy. The two cousins find a book of magic spells, and Rowdy uses one to become the toughest man on Earth. Except that Captain Marvel is still tougher.