Santo y Blue Demon contra Dracula
y el Hombre Lobo: 1971
Cinematografica (Mexico)
Color
aka Blue Demon vs Dracula and el Hombre Lobo
aka Santo and Blue

Director: Miguel Delgado
Cast: Alejandro Cruz, Santo, Aldo Monti

Plot: As the title suggests, Santo and the Blue Demon team up to fight Dracula and the Wolf Man. Not sure why they fight them, but that's probably not the focus, nor the selling point of the movie.