How many movies have María Eugenia Luna and Sergio Soto collaborated on?

They have worked on 3 movies together! Their first movie together was Blue Demon vs. the Infernal Brains (1968) while their highest rated movie together was Tonta, tonta, pero no tanto (1972). They have not worked together since Pobre, pero honrada! (1973). They are most known for their comedy films together.