AAA (1995–2003) Debuting professionally at the age of 15, Aguayo Jr. started out wrestling established veterans in
AAA. He often teamed with his father, and the pair won the
Mexican National Tag Team Championship on two occasions, defeating the teams of
Fuerza Guerrera/
Mosco de la Merced and El Cobarde II/El Cobarde Jr., respectively. Aguayo Jr. formed a team of all "juniors",
Los Junior Atómicos, including
Blue Demon Jr.,
La Parka Jr. and Máscara Sagrada Jr. The four defeated
Charly Manson, May Flowers, Nygma and El Picudo to win the
Mexican National Atómicos Championship during a show in
Jalisco. 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. Aguayo Jr.'s final major feud in CMLL was with Héctor Garza, which culminated in a Hair vs. Hair match on March 21, 2008, at
Homenaje a Dos Leyendas, which Aguayo Jr. won via a low blow.
Los Perros del Mal and return to AAA (2008–2015) Aguayo Jr. left CMLL in October 2008, along with fellow
Los Perros Del Mal members Damián 666 and
Mr. Águila, to start his own promotion called
Perros del Mal Producciones. The new promotion's debut show took place on December 7, 2008, in Mexico City. On that show, Aguayo Jr. tag-teamed with
Cibernético and Dr. Wagner Jr. to face
L.A. Park,
Olímpico and
Headhunter A, and was victorious. On June 6, 2010, at
Triplemanía XVIII, Aguayo returned to AAA to lead
Perros del Mal in an invasion of the promotion. The group quickly aligned themselves with
Konnan and Dorian Roldan's
La Legión Extranjera,
La Milicia and
Los Maniacos to form
La Sociedad. On August 14 at
Verano de Escandalo El Hijo del Perro Aguayo wrestled his first major match for AAA since his return, when he, L.A. Park and Damián 666 defeated
El Mesías, Cibernético and
La Parka in a six-man tag team match, when Perro pinned Mesías. On October 1 at
Héroes Inmortales IV El Mesías defeated Perro in a singles match. Afterwards, Aguayo injured his knee, sidelining him for the rest of the year. However, he made a surprise appearance on December 5, 2010 during the main event of
Guerra de Titanes, helping Damián 666, Halloween and
X-Fly hand
Los Psycho Circus their first-ever loss in a steel cage weapons match. On March 18, 2011, at
Rey de Reyes, Aguayo Jr. joined Damián 666, Halloween and
Super Crazy in a winning effort against
Potencia Mundial (Dr. Wagner Jr. and Los Psycho Circus); Aguayo Jr. pinned Wagner with
La Lanza, following a chair shot. On April 8, 2011. Aguayo Jr. underwent emergency surgery to remove a golf ball-sized tumor from his stomach. During the surgery, a
peptic ulcer burst, and he was placed in an
intensive care unit at the hospital in
Guadalajara, Jalisco. Aguayo Jr. was released from the hospital on April 19 and was scheduled to receive treatment for his condition for a full year. Aguayo's tumor was found to be benign; Aguayo made his return to AAA, in a non–wrestling role, on May 1 and returned to the ring on May 8 in a six-man tag team match pitting
Los Perros del Mal against
Los Psycho Circus; Aguayo pinned Psycho Clown after a low blow. The feud continued on May 29 at
Perros del Mal Producciones' third anniversary show, when
Los Psycho Circus defeated
Los Perros del Mal in a six-man tag team steel cage mask vs. hair match. As a result, Super Crazy, the last man left in the cage, was shaved bald. Aguayo Jr. was set to wrestle as part of
Los Perros del Mal at
Triplemanía XIX, facing
Los Psycho Circus to determine the first-ever
AAA World Trios Champions, but was forced to pull out of the event due to an
adverse reaction to the medication given to him as part of his tumor treatment. Aguayo returned on July 24 at a
Perros del Mal event, teaming with Damián 666 and Halloween against Blue Demon Jr.,
Cassandro and L.A. Park; the match ended in a no contest when Park turned on his partners. Aguayo Jr. next returned to AAA on August 19, replacing L.A. Park and teaming with Damián 666 and Halloween against El Mesías,
Joe Líder and
El Zorro in a six-man tag team match, which they lost via disqualification when Líder was attacked by his former tag team partner
Nicho el Millonario. After the match, Aguayo officially named Nicho the newest member of
Los Perros del Mal. Aguayo Jr. returned to
pay-per-view on October 9, 2011 at
Héroes Inmortales, unsuccessfully challenging Dr. Wagner Jr. for the
AAA Latin American Championship in a
bullterrier match. Afterward, Aguayo Jr. began a feud with
Jack Evans. On December 16, 2011 at
Guerra de Titanes, Aguayo and Evans continued their rivalry in a six-man tag team match, during which they busted each other open. The match was won when Aguayo Jr.'s teammate Héctor Garza pinned
Fénix. The feud between Aguayo Jr. and Evans continued through to
Rey de Reyes on March 18, 2012, when Aguayo Jr. pinned Evans to win the
Rey de Reyes tournament and earn a chance to contend for the
AAA Mega Championship. On August 5 at
Triplemanía XX, Aguayo Jr. unsuccessfully challenged El Mesías for the AAA Mega Championship. Afterwards, Aguayo Jr. started a year-long rivalry with Cibernético, which culminated in a
lucha de apuesta in the main event of
Triplemanía XXI on June 16, 2013. Aguayo Jr. was victorious, forcing Cibernético to have his head shaved bald. In August 2013, Aguayo teamed with Cibernético against his former stable,
La Secta. On October 18 at
Héroes Inmortales VII,
La Secta eliminated Aguayo Jr., Cibernético, and El Mesías from the
Copa Antonio Peña, which led to the three retaliating by costing
Secta members
Dark Escoria and
Dark Espiritu their match for the
AAA World Tag Team Championship. Aguayo Jr.'s
tecnico turn was completed on November 22, when
Los Perros del Mal members Daga and
Psicosis turned on him, labeling him a traitor for teaming with Cibernético. However, on December 8 at
Guerra de Titanes, Aguayo Jr. turned on Cibernético, rejoined Daga and Psicosis and brought
Los Perros del Mal back under the umbrella of the reformed
La Sociedad. On August 17, 2014, at
Triplemanía XXII, Aguayo Jr. started a new feud with the debuting
El Patrón by attacking him and his father
Dos Caras at the start of the show. Later that night in the main event, Aguayo Jr. defeated Cibernético, Dr. Wagner Jr. and Myzteziz, in a four-way elimination match to win Copa Triplemanía XXII. After the match, Aguayo Jr. was immediately attacked by El Patrón. Subsequently, Aguayo Jr. and
El Texano Jr. defeated El Patrón and El Mesías at
Héroes Inmortales VIII. In subsequent months, Aguayo Jr. focused on Myzteziz, and resuming the storyline that started in CMLL when Myzteziz was known as Místico, by issuing a challenge for a mask vs. hair match at
Triplemanía XXIII. The story led to the main event of the 2015
Rey de Reyes, in which Aguayo Jr. teamed up with
Pentagón Jr., only to lose to Myzteziz and the returning
Rey Mysterio Jr. ==Death==