2015 International Wrestling Revolution Group event
The Arena Naucalpan 38th Anniversary Show was a major annual professional wrestling event produced by Mexican professional wrestling promotion International Wrestling Revolution Group (IWRG), which took place on December 20, 2015 in Arena Naucalpan, Naucalpan, State of Mexico, Mexico. The show celebrated the 38th Anniversary of the construction of Arena Naucalpan, IWRG's main venue. In the main event the team known as Los Insoportables ("The Unbearables"; Eterno and Apolo Estrada Jr.) defeated Los Terribles Cerebros ("The Terrible Brains"; Black Terry and Dr. Cerebro), as a result of their loss Black Terry and Dr. Cerebro had all their hair shaved off under Luchas de Apuestas rules. The show also saw El Hijo de Dos Caras successfully defend the IWRG Intercontinental Heavyweight Championship and Imposible successfully defend the IWRG Intercontinental Lightweight Championship.