Back in the sixties, K. Gordon Murray bought many Mexican films, dubbed them and sold the movies to America's TV stations who were Jonesing for contact. This is the period when there were only 3-4 stations per community, and reality TV was in short supply. The Brainiac is one title.
Watch it here for free.
For more information, see:
Cotter, R. (2005). The Mexican Masked Wrestler and Monster Filmography. McFarland.