La momia azteca contra el robot humano

It's hard not to laugh at this movie. It's hard not to laugh knowing that somewhere, someone sat down and thought that having a robot fight a mummy would make for a good picture. And it might have been if the two title characters combined for more than 5 min of screen time. Unfortunately, most of the film consists of flashback scenes and some scientist's encounters with "The Bat". The robot, built out of sturdy cardboard and headlights, isn't even introduced till the movie is practically over and their monumental confrontation (the premise the movie is supposedly centered around) lasts about 30 sec.

I have a lot of questions for this movie. Why is the bad guy referred to as "The Bat"? Why does the mummy sound like a gorilla? Why did the robot need to have a human head? Why was there an endless Aztec dance scene? Why?