* FanonDiscontinuity: His first World Heavyweight Championship run mainly due to that was the period where Wrestling/{{WWE}} was milking the late Wrestling/EddieGuerrero'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.
* FromACertainPointOfView: Rey Misterio ''Jr.'' has taken off his mask. Rey Mysterio never has. See the MaskedLuchador entry for further details.
* FridgeBrilliance: If Rey Mysterio's been hiding that knee brace under his pants for all these years, the 619 (Tiger Feint Kick, essentially a knee to the face) as a finishing move suddenly makes a lot of sense.
* {{HSQ}}: Taken UpToEleven in his first "I-Quit" match with Chavo Guerrero on ''[[Wrestling/WWESmackDown 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 HistoryRepeats 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.
* MemeticMutation: "I've had surgery on my knee ''five times...''"
* {{Misblamed}}: A type II example concerning the 2014 Royal Rumble. Rey Mysterio is one of the most popular, beloved {{Face}}s 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 [[BryanDanielson 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.
* ReplacementScrappy: The fans were [[{{Understatement}} more than a little upset]] that it was him who was the no. 30 entrant in the 2014 Royal Rumble and not Wrestling/DanielBryan. 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.
* VindicatedByHistory: 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.
* WinTheCrowd: 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, Wrestling/VinceMcMahon 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.
* TheWoobie: "The Ultimate Underdog".
** IronWoobie, that is. ''Nobody'' ever had a harder road to the World Heavyweight Championship, but Rey hardly ever cracked on his way to victory.
* XPacHeat: 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 ([[SarcasmMode 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.