Perro Aguayo Jr. was the son of Mexican wrestling legend Perro Aguayo, who helped discovered the promotion AAA in 1992. Aguayo Jr. debuted within the ring at simply 15 years outdated in 1995, and regularly teamed along with his father. In his debut, he defeated Juventud Guerrera in an “Olympic Guidelines” match at TripleMania III-B. Aguayo Jr. and his father received the Mexican Nationwide Tag Crew Championship twice. In 1995, Aguayo Jr. labored his first main present in June, when he misplaced to Guerrera at TripleMania. He created his first steady with three different younger luchadors referred to as Los Junior Atómico. After taking a number of losses, the group disbanded and Aguayo Jr. started to crew with Místico, the unique Sin Cara in WWE, with whom he received the Mexican Nationwide Tag Crew Championship.

Aguayo Jr. competed in AAA for eight years, then headed to CMLL in summer time 2003, initially as a face to crew with Negro Casas. Having usually competed as a heel, Aguayo Jr. did not precisely win the group’s adoration, so the corporate turned him again to the darkside, a swap that might happen a number of occasions. His father additionally usually made appearances all through his time with CMLL, together with throughout Aguayo Jr.’s feuds with Universo 2000 and El Hijo del Santo. His closing feud with CMLL, in his first run, was towards Héctor Garza, which resulted in a hair-versus-hair match that noticed Aguayo Jr. win with a low blow.

Aguayo began his personal steady throughout his time in CMLL referred to as Perros del Mal. Through the years, the steady featured former WCW stars corresponding to Damian 666, Halloween, and Hector Garza, and present AEW stars Penta El Zero Miedo and Taya Valkyrie. Perros del Mal, or “The Canines of Evil,” had a motto of “Dios perdona, los Perros no” (“God forgives, the Canines do not.”).