When he began wrestling in Tijuana in 1994 he received additional training by Rey Misterio, Sr. and also adopted the ring persona "León Negro" (Spanish for "Black Lion"), a rúdo (bad guy) mid-card character.

[1] In 1995 he travelled to Japan and worked for Frontier Martial Arts Wrestling (FMW) teaming with Ultraman as Ultraman-Taro for the tour.

In January 1996 Gonzalez lost the León Negro mask twice, both times by losing a Lucha de Apuesta to Halloween, once in Tijuana and once in San Luis Río Colorado, Sonora.

[1] Gonzalez became noticed by Asistencia Asesoría y Administración (AAA) owner Antonio Peña through his work in Tijuana and landed a full-time contract with the company in 1997.

On August 23, 1998, Psicosis, Histeria, Maniaco, and Mosco de la Merced teamed up to participate in a tournament for the vacant Mexican National Atómicos Championship, representing Los Vipers.

During this time period Psicosis turned técnico as he joined "The Mexican Powers" along with Juventud Guerrera, Crazy Boy, and Joe Líder.

Histeria later handed the rights over to Antonio Peña, who decided to allow Psicosis II to keep the ring character, making the storyline a moot point.

The feud with Abismo Negro was supposed to be settled at Triplemanía XVI in a cage match, but it was cancelled in the weeks leading up to the event, followed by Mr. Niebla leaving AAA.

[10] Following Mr. Niebla's defection from AAA Psicosis II, Histeria, and Black Abyss were used less frequently and not in any long term storylines.

[12] Since the beginning of the "Los Independientes" storyline neither Psicosis nor Histeria have worked on Perro del Mal events.

[15] On May 16, 2010, Psicosis wrestled against La Sombra in a match that saw the surprise appearance of both Mr. Águila and Rayo de Jalisco, Jr. Mr. Águila returned to CMLL to side with Los Independientes while Rayo de Jalisco, Jr. ended up siding with CMLL in their war against the outsider group.

[16] The following day in Arena Coliseo Olímpico returned to CMLL and attacked Máximo during the main event of the show; at the time it was not clear if he had actually joined the group of outsiders or not.

[15] On August 16, 2010, it was announced that Psicosis was one of 14 men putting their mask on the line in a Luchas de Apuestas steel cage match, the main event of the CMLL 77th Anniversary Show.

[17] Psicosis II was the 12th and last man to leave the steel cage, opting to keep his mask safe instead of helping fellow Invasor Olímpico out.

[18] On September 20, 2011, Psicosis II, Olímpico, and the new leader of Los Invasores, Volador Jr., defeated Ángel de Oro, Diamante, and Rush to win the Mexican National Trios Championship.

The parties met in Mexico City's Board of Conciliation and Arbitration to see if a settlement could be reached or if the matter would be taken to court.