- Dork Age: His WCW run after unmasking. Firstly because it only happened because Eric Bischoff thought the Masked Luchador thing was dumb, secondly because he was turned heel and put in a street punk heel Power Stable (yeah, people didn't like them much) and thirdly because people thought he made a pretty terrible heel. Damn near EVERYONE, including Rey himself, hated the move. Fortunately, he would have the last laugh by joining WWE, getting his mask back on by dropping the "Jr." from his name and staying face for his entire time with the company.
- Fanon Discontinuity: His first World Heavyweight Championship run mainly due to that was the period where WWE was milking the late Eddie Guerrero's name for all it was worth. Not to mention they dropped "heavyweight" from the title's name for the duration of Mysterio's reign, as if no one would notice.
- From a Certain Point of View: Rey Mysterio Jr. has taken off his mask. Rey Mysterio never has. See the Masked Luchador entry for further details. (Concerning him returning to the Rey Jr. name post-WWE, enough time passed that the authorities forgave and forgot the whole thing.)
- "Funny Aneurysm" Moment: Rey Mysterio and Batista teamed together for many years on SmackDown. They were the two wrestlers at the center of the X-Pac Heat storm at the 2014 Royal Rumble.
- Germans Love David Hasselhoff: Junior became a legend in Japan almost overnight.
- Memetic Mutation: "I've had surgery on my knee five times..."
- Pray to Kneesus.
- Misblamed: A type II example concerning the 2014 Royal Rumble. Rey Mysterio is one of the most popular, beloved Faces in the WWE today. Yet when he came out as number 30 in the Rumble, he proceeded to get nuclear heat from the crowd. Why? Because the fans wanted to see Daniel Bryan in the Rumble, and were pissed that he wasn't. So poor Rey had to take the brunt of their criticism, even though the fault was most definitely in the hands of the executives.
- Replacement Scrappy: The fans were upset that it was him who was the no. 30 entrant in the 2014 Royal Rumble and not Daniel Bryan. The sad part is, Rey is fairly popular wrestler, but he just wasn't the person people wanted to see.
- Let's repeat that: Rey Mysterio got booed. That should give you an idea of how serious this is.
- Shocking Moments:
- Rey Mysterio winning the 2006 Royal Rumble at Number 2.
- Hoo boy, his first "I-Quit" match with Chavo Guerrero on SmackDown. And the biggest "holy shit" moment of the match was that Chavo actually won, by hanging Mysterio upside-down from the set and smashing his knee with a chair until Mysterio screamed the words.
- Only for a rather nasty case of History Repeats to come into play later on with Mysterio hanging Chavo upside down on a turnbuckle and doing the exact same thing to Chavo. Unsurprisingly, Chavo quit that time.
- Come 2018, Mysterio hasn't been seen on WWE programming in 4 years, and was last seen doing work on Lucha Underground, so people convinced his time with WWE was over. And then he comes out at the famed #27 spot at the Royal Rumble. Cue global scale mark out.
- Signature Scene:
- Everything about Rey's appearance at the 2006 Royal Rumble: the entrance on Eddie Gurerro's cars as #2, him surviving to the final 2, and then eliminating Randy Orton (#30!) with a headscissors to a roaring crowd.
- Him and his son Dominic double-teaming against Brock Lesnar at Survivor Series 2019 culminating with a Stereo 619.
- Trauma Conga Line: After finally getting out of his contract after a year of being forced to do nothing, Rey makes his triumphant return to Mexico... and then in a horrific freak accident Perro Aguayo Jr dies shortly after taking some moves from him.
- Vindicated by History: When WCW closed in 2001, the then WWF initially passed on Mysterio's contract because they had no interest in him. They changed their minds and hired him in 2002. Now he's a 3 time World Champion.
- Win the Crowd: Not so much the crowd, but the fact that Rey has become World Champion makes this more of a corporate one. Due to his size, wrestling style and the fact he isn't a star "made" by WWE, Vince McMahon was reluctant to ever push him into the main event. The sheer quality of his matches and ability to get over with WWE's target demographic, however, eventually led to him becoming one of the company's biggest names and a consistent main eventer.
- The Woobie: "The Ultimate Underdog".
- Iron Woobie, that is. Nobody ever had a harder road to the World Heavyweight Championship, but Rey hardly ever cracked on his way to victory.
- X-Pac Heat: Believe it or not.
- Never in the USA, but after he unmasked in WCW, he got some seriously negative reactions in Mexico. It looked even worse because he was at the time feuding with (surprise) Psicosis, who was a holdout against unmasking. As it turned out, the conclusion of the feud was supposed to be Psicosis winning Rey's mask, but since Misterio had already unmasked, CMLL's governing body refused to allow Misterio to wrestle masked. This forced a rebooking to a much less meaningful stipulation, and Misterio ended up winning, which didn't make the CMLL fans happy. Fortunately, WWE were able to get the mask back on through some Loophole Abuse, the Mexican Athletic Commission let it happen because they hated the unmasking as well, the WCW stunt became Canon Discontinuity and the bad taste of it quietly faded.
- Also, as mentioned above in Mis-blamed and Replacement Scrappy, Rey, got insane nuclear heat when he came out as the 30th Royal Rumble entrant instead of Daniel Bryan, who fans were expecting.
YMMV / Rey Mysterio Jr.