[4] Veneno, Hijo de Pirroth and Doctor X defeated Tony Rivera, Tigre Blanco and Volador Jr. on CMLL's annual Sin Piedad show.
[6] In early 2002 Gran Markus, Jr. turned on the rest of Los Borucuas, unhappy with Pierroth's leadership, as part of the storyline junior member Veneno stepped up and wanted to punish the "traitor", which led to a match where both wrestlers put their mask on the line (called a Luchas de Apuestas, or "Bet match").
The match was the main event of CMLL's 2002 Homenaje a Dos Leyendas ("Homage to Two Legends") show on March 17, 2002.
The match saw Veneno lose and thus was forced to unmask, reveal his birth name and age in front of everyone in Arena Mexico as per lucha libre traditions.
[8] On June 20, 2004 Veneno was once again shaved bald, after losing a Luchas de Apuestas match to Tony Rivera[9] In either late 2004 or very early 2005 Veneno stopped working for CMLL and instead started to work for International Wrestling Revolution Group (IWRG), a smaller, regional promotion compared to CMLL.
[11] La Corporacion only held the title for just over a month, vacating the championship in February, 2006 when Scorpio, Jr. stopped working for IWRG.
One such promotion was Toryumon Mexico where he competed in a tournament for the NWA International Junior Heavyweight Championship, but was eliminated in the first round.
[14] Veneno teamed up with Cerebro Nego and Kaos to compete for the vacant Distrito Federal Trios Championship, but the trio lost in the first round to eventual tournament winners Los Gringos VIP (Avisman, El Hijo del Diablo and Gringo Loco).
The first one took place on June 16 and saw Veneno team up with Máscara Año 2000, Jr., defeating Los Terrible Cerebros to earn a spot in the finals, only to be defeated by Los Psycho Circus (Monster Clown and Psycho Clown) representing Asistencia Asesoria y Administracion (AAA).
[16] The following week, April 24, Veneno and Máscara Año 2000, Jr. represented IWRG once again, defeating Paranoiko and Violento Jack from Desastre Total Ultraviolento (DTU) but lost to Nicho el Milionario and Pimpinela Escarlata from AAA in the finals.