Throughout his career Muñoz never lost a Lucha de Apuestas match and retired without exposing his face to the public; he would later be buried in his signature blue and silver mask.

Mid 20th Century 1970s and 1980s 1990s 2000s 2010s and 2020s Alejandro Muñoz Moreno was born October 12, 1922, in García, Nuevo León, Mexico.

At a young age, Alejandro dropped out of school and moved to Monterrey, where his uncle gave him a job working on the National Railroad.

[7] Adopting the mask and persona of The Blue Demon, he headed back to Mexico to start a full-time in-ring career.

[8][6] The storyline feud between the two culminated with Blue Demon defeating El Santo in a well-publicized series of matches in 1952 and 1953.

[7][9] Their rivalry never entirely abated in later years (although they co-starred in a number of Mexican horror films) since Santo always remembered his defeat at the Blue Demon's hands.

But in 1964, Enrique Vergara, the producer of the then-successful Santo movies, decided to diversify by allowing the 42-year-old Blue Demon to star in a series of luchador films of his own.

In three of his films, Blue Demon starred as the leader of a squadron of masked superheroes known as Los Campeones Justicieros (The Champions of Justice).

[3] He suffered a fatal heart attack on a park bench near a subway kiosk while on his way home from his regular morning training session at The Blue Demon Instituto Atletico, where he was teaching others his fighting skills.

[6] Blue Demon is considered one of the biggest legends of lucha libre second only to El Santo in terms of popularity and influence both in and outside of Mexico.