The IWRG 20th Anniversary Show was a major lucha libre event produced and scripted by the Mexican International Wrestling Revolution Group (IWRG) professional wrestling promotion on January 3, 2016. The show was held in Arena Naucalpan, Naucalpan, State of Mexico, which is IWRG's primary venue. As the name indicates the event commemorates the anniversary of IWRG, which was founded on January 1, 1996.

The main event of the IWRG 20th Anniversary Show was a Lucha de Apuestas, or "bet match" where both Toscano and Danny Casas put their hair on the line. Toscano lost the match and as a result had all his hair shaved off afterwards. The show included four additional matches. The last four matches of the show were televised as part of IWRG's Zona XXI (Zone 21) weekly television show on AYM Sports

Wrestler-turned-promoter Adolfo "Pirata" Moreno began promoting wrestling shows in his native Naucalpan de Juárez, Mexico, bringing in wrestlers from Empresa Mexicana de Lucha Libre (EMLL) to Naucalpan as well as featuring wrestlers from the Mexican independent circuit. Later on he would promote shows mainly in "Arena KO Al Gusto" and served as the Universal Wrestling Association (UWA) partner, using the name Promociones Moreno as the business name for his promotional efforts. In 1977 Moreno bought the run down Arena KO Al Gusto and had Arena Naucalpan built in its place, an arena designed specifically for wrestling shows, with a maximum capacity of 2,400 spectators for the shows. Arena Naucalpan became the permanent home for Promociones Moreno, with very few shows held elsewhere.

In late 1995 Adolfo Moreno decided to create his own promotion, creating a regular roster instead of relying totally on wrestlers from other promotions, creating the International Wrestling Revolution Group (IWRG; sometimes referred to as Grupo Internacional Revolución in Spanish) on January 1, 1996. From that point on Arena Naucalpan became the main venue for IWRG, hosting the majority of their weekly shows and all of their major shows as well. The first IWRG Anniversary Show was held on January 1, 1997 with all subsequent shows being held on or right after January 1 each year, all at Arena Naucalpan.

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