Abbott and Costello Meet Frankenstein (1948)

This is often labeled A&C's best movie. And its understandable.  It has a great supporting cast of Lon Chaney, and Bela Lagosi, and Lenore Aubert (a Dracula ally who pretends to love Lou).  There's nary a wasted moment, and if Costello isn't being funny, something interesting/scary is going on.  Supposedly, Costello didn't want to do the movie, declaring the script was so bad "His little girl write better".  And you can see why Costello had that reaction. 

Almost all the enjoyment comes, not from the dialogue, but from the great actors, the direction, and Costello reactions.  But all that is excellently done. Obviously pitched to a "Teen Audience", this kid at heart enjoyed it.  Rating ***