How many movies have Blue Demon and José W. Bustos collaborated on?

They have worked on 7 movies together! Their first movie together was Santo and Blue Demon Against the Monsters (1970) while their highest rated movie together was The Mummies of Guanajuato (1972). They have not worked together since The Mansion of The 7 Mummies (1977). They are most known for their action films together.