Héroes Inmortales XII

 was a professional wrestling event produced and scripted by the Mexican professional wrestling promotion Asistencia Asesoría y Administración (AAA) or Triple A. The event took place on October 28, 2018, and was held in the Gimnasio Miguel Hidalgo in Puebla, Puebla, Mexico. It was broadcast on Twitch.tv.

Results

 * Numbers in parentheses indicate the length of the match.
 * (c) refers to the champion(s) heading into the match.
 * Faby Apache (c) defeated Keyra, Scarlett Bordeaux and Star Fire in a Four Way Match to retain the AAA Reina de Reinas Championship
 * Nuevo Poder del Norte (Carta Brava Jr., Mocho Cota Jr. & Tito Santana) defeated Aero Star, Angelikal & Drago and Mamba, Máximo & Pimpinela Escarlata in a Three Way Six Man Tag Team Match
 * Los Mercenarios (El Texano Jr. & Rey Escorpión) (c) defeated DJZ & Laredo Kid and Bandido & Flamita in a Three Way Match to retain the AAA World Tag Team Championship
 * Pagano defeated Averno, Chessman, El Hijo del Fantasma, Espectro, Hijo del Vikingo, Kaoz, La Parka Negra, Niño Hamburguesa and Súper Fly to win the Copa Antonio Peña
 * Murder Clown & Psycho Clown defeated Killer Kross & Monster Clown in a Domo de la Muerte Steel Cage match
 * Dr. Wagner, Jr. defeated Jeff Jarrett in a Lucha de Apuesta Hair vs. Hair match