El Castillo de los Monstruos

El Castillo de los monstruos (Spanish for 'The castle of the monsters') is a 1958 Mexican horror comedy directed by Julián Soler.

Plot
Mexican comedian, El Clavillazo (Antonio Espino), is in love with a seamstress named Beatriz (Evangelina Elizondo), and also hangs out with a variety of odd characters, including a newsboy and a mental patient. Meanwhile, at the nearby castle, a mad scientist named “Dr Sputnik” and his scarred, hunchbacked assistant are busy making monsters.

The doctor poses as a kindly blind man in town and uses hypnosis to lure Beatriz to his castle, brainwashing her into believing that she is his own love named “Galatea”. El Clavillazo, with assistance from his friends, blunders his way into the castle, where he ends up being chased around by a variety of monsters including a werewolf, a mummy, a vampire clearly modeled after Count Dracula, a gill-man clearly inspired by "Creature from the Black Lagoon" and the butler who resembles Frankenstein's Monster. Being kept in a cell for unspecified reasons is another, unidentified humanoid ape-like creature (perhaps based on Dr. Jekyll and Mr. Hyde).

In the end, El Clavillazo manages to defeat the monsters, mostly by luck, and rescues the girl. Dr. Sputnik has a falling-out with his assistant, resulting in his being shot after he stabs the scarred hunchback. Clavillazo and Beatriz, about to be crushed by a deadly trap involving the walls moving together, are rescued in the nick of time by the rest of the gang, and they all live happily ever after.