The 2000 El Castillo del Terror (Spanish for "The Tower of Terror") was a major lucha libre event produced and scripted by the Mexican International Wrestling Revolution Group (IWRG) professional wrestling promotion on November 2, 2000. The 2000 El Castillo del Terror was the first ever IWRG El Castillo del Terror event held, starting an annual tradition for the promotion. The main event was the eponymous Castillo del Terror (Spanish for "Tower of Terror") steel cage match where the last person eliminated would be forcibly unmasked or have his hair shaved off as a result.

The main event saw the luchador enmascarado (masked wrestler) Super Mega being the last man in the steel cage and thus was forced to unmask and reveal his birth name – Juan Manuel Segura Hernández to the audience. The rest of the show featured four matches, including one for the IWRG Intercontinental Heavyweight Championship where champion Scorpio Jr. successfully defended against Villano IV two falls to one.

The Mexican wrestling promotion International Wrestling Revolution Group (IWRG, sometimes referred to as Grupo Internacional Revolución in Spanish) has a long-standing history of holding major events focused on a multi-man steel cage match where the last wrestler left in the cage would be forced to either remove their wrestling mask or have their hair shaved off under Lucha de Apuestas, or "bet match", rules. Starting in the year 2000 IWRG has promoted a fall show, around the Mexican Day of the Death, under the name El Castillo del Terror ("The Tower of Terror"), creating an annual event on their major show calendar that has been held each year since 2002.

...
Wikipedia