Dionicio Castellanos Torres (born May 19, 1971) is a Mexican professional wrestler, better known by the ring names Psicosis (sometimes Anglicised as Psychosis) and Nicho el Millonario. He is best known for his appearances with the promotions Lucha Libre AAA World Wide, Consejo Mundial de Lucha Libre and the World Wrestling Association, as well as his appearances in the United States with Extreme Championship Wrestling, Total Nonstop Action Wrestling, World Championship Wrestling, and World Wrestling Entertainment. Championships held by Psicosis include the AAA World Tag Team Championship, WWA World Junior Light Heavyweight Championship, WWA World Welterweight Championship, and WWA World Trios Championship. Professional wrestling career Early career (1989–1996) Castellanos debuted as "El Salvaje" after being trained by Rey Misterio, Sr. and his brother, Fobia. He often teamed with Fobia and wore face paint. In March 1989, Castellanos began wrestling as "Psicosis" for the local promotion in his native Baja California, where some of his biggest feuds pitted him against El Hijo del Santo and Rey Mysterio Jr. He would eventually wrestle Mysterio Jr. over five hundred times throughout this career. He also frequently feuded with La Parka as well as Juventud Guerrera and Fuerza Guerrera. Psicosis first made a name for himself in the United States through AAA's 1994 pay-per-view broadcast When Worlds Collide, where he, Fuerza Guerrera, and Madonna's Boyfriend defeated Heavy Metal, Latin Lover, and Rey Mysterio Jr. Psicosis debuted in the United States-promotion Extreme Championship Wrestling in September 1995, facing Mysterio Jr. in a critically acclaimed bout at Gangstas Paradise. Psicosis was recruited by ECW booker Paul Heyman – who was seeking new talent to replace Chris Benoit, Eddie Guerrero and Dean Malenko, all of whom had recently left the promotion – at the recommendation of Konnan. World Championship Wrestling Early years (1996–1998) Castellanos signed with World Championship Wrestling in 1996, anglicizing his name to "Psychosis." His debut pitted him against Konnan at Clash of the Champions XXXII. Through the early years, Psychosis would typically face other luchadores, frequently getting a midcard spot during pay-per-view events. He engaged in a feud with Último Dragón, first working as the fan favorite. He was later signed by Dragon's former manager Sonny Onoo, turning into a villain in the process. During the entire length of the feud, he was unable to defeat the Dragon. He then began teaming with La Parka under Onoo's tutelage. After Onoo dropped them in favor