Dominik's early appearances (2003–2019) Dominik made his first professional wrestling appearance on the June 5, 2003 edition of
SmackDown! at 6 years old when he was in the crowd along with his mother Angie and his younger sister Aalyah watching his father Rey Mysterio win the
WWE Cruiserweight Championship from
Matt Hardy. After the match, Dominik came over the barricade and into the ring to celebrate with his father, who promptly gave him a massive hug and hoisted him up on his shoulders. Dominik made his second appearance on the December 11 edition of
SmackDown! in the crowd again with Angie and Aalyah watching his father compete against
WWE Champion Brock Lesnar in a non-title match in a losing effort. In the summer of 2005, Dominik made his third appearance in WWE at the age of 8, but this time in a more prominent role, as part of his father Rey's ongoing
feud with
Eddie Guerrero, in which the two rivals fought for custody of him. During the
storyline, Guerrero stated that he was Dominik's (
kayfabe) biological father. Mysterio defeated Guerrero in a
ladder match for custody of Dominik at
SummerSlam. He made two more appearances in 2006, first at
WrestleMania 22 with Angie and Aalyah watching his father win the
World Heavyweight Championship for the first time and second on the September 15 edition of
SmackDown! where he watched backstage as his father battled with
Mr. Kennedy. Mysterio would lose this match after
Chavo Guerrero and
Vickie Guerrero showed up on the stage with Gutiérrez to distract Mysterio as Kennedy rolled him up for the win. He once again appeared on the March 12, 2010 episode of
SmackDown, this time during the feud between Rey Mysterio and the
Straight Edge Society (
CM Punk,
Luke Gallows, and
Serena). On the March 19, 2019 episode of
SmackDown Live, Dominik appeared with his father, Rey Mysterio, who announced that he would be facing
Samoa Joe for the
WWE United States Championship at
WrestleMania 35. He appeared on
Raw from April to June, during the feud between Mysterio and Joe. During the following months, he was involved in his father's storylines and matches, including getting physically involved in Rey's
WWE Championship match against Brock Lesnar at
Survivor Series, where they attacked Lesnar and performed a double
619, but Rey was nonetheless defeated.
Work as a tag team (2020–2022) In May 2020, Dominik was involved in the feud between his father and
Seth Rollins. His in-ring debut took place at
SummerSlam, being defeated by Rollins. After the event, Dominik and Rey began to work as a tag team, defeating Rollins and Buddy Murphy at
Payback. As part of the
2020 Draft in October, The Mysterios were drafted to the
SmackDown brand. The Mysterio family's feud with Rollins would end on the November 13 episode of
SmackDown after Rey defeated Rollins in a No Holds Barred match after assistance from Murphy, who turned on Rollins. against
The Street Profits in December 2021 At
WrestleMania Backlash, Dominik and Rey won the SmackDown Tag Team Championship, marking Dominik's first championship in WWE, and making Dominik and Rey the first father and son team to become tag team champions in WWE history. At the
Money in the Bank pre-show, the Mysterios dropped the titles to The Usos, ending their reign at 63 days. As part of the
2021 Draft, both Rey and Dominik were drafted to the
Raw brand. On the January 31, 2022 episode of
Raw,
The Miz defeated Dominik. The following week, the Mysterios were guests on "Miz TV". Rey claimed that Miz cheated to defeat Dominik while Miz took issue that Rey had an opportunity to qualify for the
WWE Championship Elimination Chamber match while he did not and also that Rey was the cover star of the
WWE 2K22 video game. Miz also questioned if Rey was truly Dominik's dad, referencing the
child custody battle that Rey had with
Eddie Guerrero back at
SummerSlam in 2005. Dominik subsequently defeated Miz in a rematch. Rey then defeated Miz during the
Elimination Chamber Kickoff pre-show. Later backstage, Miz accused Rey of cheating due to Dominik and said he would find a tag team partner who was a "global superstar". On the following episode of
Raw, as Miz teased the identity of his partner to face Rey and Dominik at
WrestleMania 38, the Mysterios interrupted, stating it did not matter who Miz had chosen. Miz then revealed his partner as social media personality
Logan Paul, after which, Miz and Paul attacked the Mysterios. At WrestleMania 38, the Mysterios were defeated by Miz and Paul. The Mysterios later began feuding with
The Judgment Day (
Finn Bálor,
Damian Priest, and
Rhea Ripley) over the group's desire to recruit Dominik, with the latter continuously refusing, leading to the group attacking the Mysterios on several occasions. During Rey's 20th anniversary celebration on the July 25 episode of
Raw, the Mysterios defeated Bálor and Priest in a tag team match. Afterwards in a backstage segment, Ripley attacked Rey's daughter Aalyah before dragging Dominik away, leading Rey into an assault by Bálor and Priest. At
SummerSlam, the Mysterios defeated Bálor and Priest in a
no disqualification match following an interference from the returning
Edge, The Judgment Day's former leader, who attacked Bálor and Priest, allowing the Mysterios to defeat them. At
Clash at the Castle, after Rey and Edge defeated Bálor and Priest, Dominik hit Edge with a low blow. Rey pleaded with Dominik to stop, but Dominik attacked Rey, turning
heel and disbanding the Mysterios in the process.
Feud (2022–present) Following his heel turn at Clash at the Castle, Dominik officially joined The Judgment Day on the September 5 episode of
Raw and helped the group attack Edge and Rey. Dominik and The Judgment Day continued to torment Rey on
Raw to the point that Rey informed WWE Chief Content Officer
Triple H that he would rather quit than to fight Dominik. Triple H offered Rey to join the SmackDown brand instead. Rey accepted Triple H's offer, temporarily cooling off Rey's feud with Dominik and The Judgment Day. As part of The Judgment Day, Dominik took on a gimmick mirroring Eddie Guerrero's
Latino Heat while together with Ripley, with Ripley calling herself as Dominik's "Mami". At the
2023 Royal Rumble, Rey was scheduled to enter the Royal Rumble match at #17 but did not appear when his entrance music was played. Dominik then entered at #18 wearing Rey's mask, hinting that he and/or The Judgment Day had taken out Rey. On the March 10 episode of
SmackDown, Dominik and The Judgment Day interrupted Rey as Rey was about to address being the first inductee to the
WWE Hall of Fame Class of 2023. After The Judgment Day defeated
Legado Del Fantasma (who were a heel stable and had recently turned face for siding with Rey) in a six-man tag team match, Dominik taunted and goaded Rey into hitting him, saying that Rey was a "deadbeat dad" and that "[Dominik] should have been
Eddie's son." On the following episode of
Raw, Dominik interrupted Rey again and challenged Rey to a match at
WrestleMania 39. Rey declined, saying he would never fight his own son. On the March 24 episode of
SmackDown, Rey finally accepted Dominik's challenge after Dominik berated Angie at ringside. On the March 31 episode of
SmackDown, Rey reformed the
Latino World Order and invited Legado Del Fantasma (
Santos Escobar,
Zelina Vega,
Joaquin Wilde, and
Cruz Del Toro) to join as a token of appreciation for aiding him in his feud against Dominik and The Judgement Day. Rey would go on to defeat Dominik on Night 1 of WrestleMania 39. At the
2023 Draft, The Judgment Day were drafted to Raw and the Latino World Order were drafted to SmackDown, cooling off the feud once more. On the December 5 episode of
NXT, Dominik's original opponent for his
NXT North American Championship defense at
NXT Deadline,
Wes Lee, was not medically cleared to compete due to a legitimate back injury. Rey appeared via video message and announced
Dragon Lee will take his place in the match. At the event on December 9, Lee, with Rey in his corner, defeated Dominik to win the title. On the March 22, 2024 episode of
SmackDown, Escobar, who defected from the LWO in November 2023, defeated Rey after interference from Dominik. One week later, Escobar and his reformed
Legado Del Fantasma stablemates thanked Dominik for his actions. Rey interrupted while introducing Lee as the newest member of the LWO. Rey and Lee subsequently challenged Escobar and Dominik to a
tag team match at
WrestleMania XL. However, Lee was taken out by
Carlito backstage during the go-home show of
SmackDown before WrestleMania. This led to
Andrade taking Lee's spot after an in-ring segment between Escobar, Dominik, Rey, and Andrade. At Night 1 of WrestleMania XL, Rey and Andrade emerged victorious. At the
2024 Draft, The Judgment Day and LWO were drafted to the Raw brand, reigniting the Mysterios' feud.
Dominik ruining Rey's holidays 2022 On
Thanksgiving, Dominik invited Rhea Ripley to the Mysterio family home. Dominik and Ripley assaulted Rey after Rey and
Angie refused entry into the house. On
Christmas Eve, Dominik and Ripley visited Dominik's grandparents' home. A confrontation ensued between Dominik, Ripley, Rey and Angie outside of the house with Dominik shoving Rey and Angie slapping Ripley. The police arrived shortly after and (
kayfabe) arrested Dominik. After being released from police custody, Dominik took on an additional gimmick of being a former
convict-thug who "had served time in prison with the world's most dangerous people" but in reality, he was only in county jail for a few hours.
2023 On
Valentine's Day, Dominik and Ripley intruded on Rey's and Angie's Valentine's Day dinner where the latter party immediately gave up their table to the former. At the end of the dinner, Dominik fled the restaurant after seeing two police officers entering the premise thinking there was a
sting operation on him as "[he was] the most wanted man on
TikTok". Ripley was left to pick up the bill before leaving. ==Championships and accomplishments==