Rey Mysterio made his debut in Mexico in the year 1989, when he was only fourteen. From 1992 to 1995, he wrestled with Asistencia Asesoría y Administración (Assistance, Assessment and Administration), which was based in Mexico.
Later in 1995, he signed with 'Extreme Championship Wrestling'. The next year, he was signed by 'World Championship Wrestling'. In his first match at the Great American Bash, he faced the Cruiserweight Champ Dean Malenko, in which Malenko emerged victorious. Mysterio mostly fought with high flyers such as Ultimate Dragon, Juventud Guerrera, Billy Kidman, and his longtime rival, Psicosis, whom he defeated in July 1996 in 'Bash at the Beach'.
Very soon, again in July 1996, Rey Mysterio fought Malenko, defeating him to win his first Cruiserweight Championship. He reigned as champion for three months. During this time, he had to defend his title from many, such as Ultimate Dragon, Super Caló and then Malenko himself.
Mysterio eventually lost the title after losing to Malenko at the Halloween Havoc. Later, he challenged Ultimate Dragon for the J-Crown Championship in November 1996. However, he was unsuccessful.
In 1997, Rey won the Cruiserweight Championship for a second time, after emerging victorious in a match against his opponent Guerrero. However, in November, he was defeated by Guerrero, and the latter reclaimed the title.
In January 1998, Rey Mysterio won his third Cruiserweight Championship after defeating Juventud in a match. He lost it after nine days to Chris Jericho.
Later that year, he formed a tag team with Billy Kidman to fight at the Latino World Order. Later, Mysterio fought Kidman, for the Cruiserweight Championship, though he was unable to win it back.
In 1999, Mysterio was forced to remove his mask after he and his tag partner Konnan were defeated in a 'Hair vs. Mask match' which he fought against Kevin Nash and Scott Hall. He expressed strong disappointment over being unmasked, and said that he only removed it because he had no other choice.
With a new and a better mask, he made his debut with the WWE (World Wrestling Entertainment) in 2002. After facing various opponents such as Chavo Guerrero, Kurt Angle and Big Show, he later reformed his tag team with Billy Kidman.
Continue Reading Below
Later in 2005, he teamed up with Eddie Guerrero, and together won tag team titles. However, Guerrero was secretly jealous of Rey, as he had never been able to beat him. Therefore, during a match, he turned on him, and after abandoning him, he beat up Rey as well. This “jealousy and feuding” at WrestleMania was part of a storyline to build up audience’s interest.
During this time, due to his frustration, Guerrero also revealed a secret that they had shared regarding Rey's son Dominick—this too was a part of a storyline. Guerrero was actually Dominick's real father whom he had left with Mysterio when Dominick was a baby. They had a ladder match, for his custody, in which Rey turned out victorious. Later, Rey was defeated by Guerrero, after which their feud finally came to an end.
Later, after defeating Randy Orton, Rey Mysterio won the World Heavy Weight Champion in 2006. This was followed by a feud between Mysterio and John "Bradshaw" Layfield as the latter believed that it was he who deserved the World Heavyweight Title.
This resulted in Rey having to face three opponents chosen by Bradshaw. He was defeated but later, in a direct match with Bradshaw, he retained his title.
Later in 2009, Rey Mysterio challenged Bradshaw for his Intercontinental Championship. Rey won the match in just twenty-one seconds, resulting in him being made the 21st Triple Crown Champion in World Wrestling Entertainment history.
In 2011, Mysterio took part in a tournament for the WWE Championship. He advanced to the finals, where he faced The Miz. Rey was victorious, and won his first WWE Championship. However, he lost his title to John Cena later the same day. Later, he fought against Alberto Del Rio, who was the new champion, in order to reclaim his title. However, Mysterio lost.
In 2015, after ending his long tenure with WWE, he was again signed by Asistencia Asesoría y Administración. Currently, he is with Lucha Underground, with whom he had signed in December 2015.