Psicosis) at the 1999 Verano de Escándalo show. After Los Junior Atómicos disbanded, Aguayo began teaming regularly with Héctor Garza, engaging in a four-way storyline feud with Heavy Metal and Latin Lover. These four competed in various tag and four-way matches throughout the lengthy feud. One of the highlights of the storyline was Heavy Metal being shaved bald after losing a combination four-way steel cage match and lucha de apuesta on the 2001 Guerra de Titanes show, when Garza pinned Heavy Metal. Later on Latin Lover would defeat Garza in another lucha de apuesta. Aguayo Jr. and Garza defeated Los Vipers (Abismo Negro and Electroshock) to win the Mexican National Tag Team Championship. The duo held the title for 61 days before losing it to Pirata Morgan and El Texano. Consejo Mundial de Lucha Libre (2003–2008) In May 2003, Aguayo Jr. moved to Consejo Mundial de Lucha Libre (CMLL). He was initially brought in as a técnico to team with Negro Casas against Los Guerreros del Infierno, but did not receive the expected positive reactions from the crowd, and CMLL decided to turn him heel by having him win a tournament for a shot at Atlantis' Michinoku Pro Wrestling Tohoku Junior Heavyweight Championship. He won the tournament over established popular heels like Dr. Wagner Jr. and Rey Bucanero, so by the time he met the babyface Atlantis for the title, he was seen as a heel by the fans. The title challenge was unsuccessful, but Aguayo was quickly put into a program with Los Capos with the story being he was getting revenge on Universo 2000 for ending his father's career. During this feud, Shocker's popular Los Guapos group backed Aguayo Jr. and he became a face again. The feud continued through the winter and into 2004 and was ended when Aguayo and El Terrible (a member of Los Guapos) defeated Cien Caras and Máscara Año 2000 in a double hair vs. hair match at the 2004 Homenaje a Dos Leyendas: El Santo y Salvador Lutteroth show. In the spring, Aguayo Jr. once again backed up Negro Casas and Shocker in their feud with Pierroth Jr., Vampiro Canadiense and Tarzan Boy. The two groups went at it in trios, singles, and tag matches before they were put in the annual "Cage of Death" match, in which the last two men in the cage, regardless of which team they are on,