The Robot Vs. The Aztec Mummy (1958)

Starring Ramon Gay, Rosita Arenas, Crox Alvarado, Luis Aceves Castaneda, Jorge Mondragon
Directed by Rafael Portillo
(actor & director credits courtesy IMDB.com)

The greedy Dr. Krupp tries again to take the breastplate and bracelet from the ancient mummy who protects them, planning to defeat him this time with a powerful robot.

Third in a series of Mexican horror films to feature an ancient monster based on the legends of Aztec mythology, following The Aztec Mummy and The Curse Of The Aztec Mummy, this effort doesn't stand on its own very well, with over half its running time devoted to presenting clips from the previous two films.  Nonetheless, the battle between robot and mummy at the film's climax is probably the most exciting sequence in all three movies, but that's not saying a great deal, as the films are as lumbering and slow as the titular monster.  However, I can't quite say I didn't enjoy the picture at all, as Castaneda's crazed scientist and the bulky robot with its human head fit the bill for another loony Mexican horror film experience.