http://radiation-scarred-reviews.blogspot.com/2009/09/robot-vs-aztec-mummy-1958.html (http://radiation-scarred-reviews.blogspot.com/2009/09/robot-vs-aztec-mummy-1958.html)
"Dr. Almada and Co. go under the Great Pyramid of Teotihuacan and found the temple, the skeleton of Xochi and the breastplate. They take it, but have to return to the temple later for the bracelet, where they encounter the mummy of Popoca, who makes sounds like a Chihuahua and can be driven off with a flashlight.
Dr. Almada and Co. barely escape with their lives."