In 2003 IWRG also introduced a group designed to be the "archenemy" of Los Megas in the form of Comando Mega, Comando Gama and Comando Omega. The group feuded for the better part of a year. The storyline between the two factions saw Mega and Ultra Mega defeat Comando Mega and Comando Gama in a Lucha de Apuesta, mask vs. mask match on June 6, 2004. Following the end of the feud with the Comandos Los Megas began to fade away; some of the members lost their masks and made only sporadic appearances over the next year. Los Megas teamed together one last time in 2005 after not having worked as a team for over six months, they joined together to lose the IWRG Intercontinental Trios Championship that they still held. On December 22, 2005, Ultra Mega was one of the participants in IWRG's annual Castillo del Terror ("Castle of Terror") event, a multi-man Steel Cage Match that came down to Ultra Mega and Nemesis. The last two competitors were forced to wrestle under Lucha de Apuesta rules in a match that Nemesis won, forcing Ultra Mega to unmask. Following his mask loss Ultra Mega turned rúdo (bad guy), but without the mask the Ultra Mega character did succeed.
