Loyal hunchbacked dwarf assistant Waldo (Santanón) brings his recently deceased master, scientist Bruno Halder (Carlos Ancira), back from the dead. Halder proceeds to build an army of monsters so that he can take revenge on his brother Otto (Ivan J. Rado) and pretty niece Gloria (Hedi Blue), girlfriend of luchador Santo.
After Santo's best pal Blue Demon (Alejandro Moreno) is captured and cloned by the mad professor, and several attempts are made to kidnap Gloria, Santo steps in to thwart Halder's dastardly plans.
This film opens with a wrestling match, and is pretty much wall-to-wall fighting, either in the ring, or outside the arena against Halder's monsters: Frankenstein, Cyclops, The Vampire, The Wolf Man, The Mummy, the Vampire Woman, and assorted zombie henchmen. The creatures are an amusing bunch of monstrosities (especially Cyclops), but once the novelty of the many shonky monsters wears off, the film will hold little appeal for anyone but avid lucha libre fans.
4/10, plus a generous bonus point for the hilarious dance scene that looks to have been lifted from an entirely different film, and for the fact that Frankenstein had an electric vibrator stuck in his neck (that's what the subtitles said!).