[Note 1][3] Eléctrico, the current Lightweight champion, is the longest reigning Mexican National Championship, having won the title on August 13, 2013.
One instance was in 1957 when Mishima Ota won the Lightweight championship, deeming him ineligible because he was a Japanese citizen.
[1] In 1992 Asistencia Asesoría y Administración, later known simply as "AAA", was formed when a number of CMLL wrestlers broke away to create a new company.
Several of the wrestlers that left were reigning Mexican National Champions and the Mexico City Boxing and Wrestling commission allowed AAA to take promotional control of those championships at that point.
In 2006 then Mini-Estrellas champion Mascarita Sagrada left AAA while still holding the championship, there was no subsequent announcement that the title was vacated, rendering it inactive from that point on.
In 1933, Salvador Lutteroth formed Empresa Mexicana de Lucha Libre ("Mexican Wrestling Enterprise"; EMLL) and was granted permission by the Mexico City Boxing and Wrestling Commission for the control of the Mexican National Heavyweight Championship.
In October 2017, Consejo Mundial de Lucha Libre ("World Wrestling Council"; CMLL, formerly EMLL) brought the championship back under their control.
Yaqui Joe was the first champion and the championship was soon defended on EMLL shows as well as on the Mexican independent circuit.
In 1992, Antonio Peña founded Asistencia Asesoría y Administración, taking a number of CMLL wrestlers with him.