These are what we call the 'YMMV items.' Things that some people find in this work. We call them 'your mileage might vary' because not everyone sees these things in the same way. This starts discussions in the trope lists, a thing we don't want. Please use the discussion page if you'd like to discuss any of these items.
Badass Decay: Averted with Burai. Despite being benched until the last minute in fights, he still manages to be awesome.
Bizarro Episode / Big Lipped Alligator Moment: At one point Dan and Mei turned into punks, and they suddenly attended gambling joints and assaulted mafias, actually killing them. That stuff was never brought up when they returned to normal, and none of the Zyurangers called them out for it.
Breakout Character / Ensemble Darkhorse: Burai. He's one of the most memorable aspects of the show, and all Sixth Rangers to appear later in the franchise owe their existences to how much the fans loved him.
Exemplified with the Zyuranger SH Figuarts release - while typical Sentai Sixth Rangers are either Web Exclusives or are released after the Reds, Dragonranger was released at retail before Tyrannoranger.
Evil Is Sexy: Lamie - played straight when in her normal form, but subverted when enlarged by Bandora at which moment she becomes an ugly monster, making Ami Kawai (the actress playing as her) feel pretty embarrassed whenever that happens.
Fridge Logic: In the final episode, how did Kai survive the Dora Talos exploding long enough to make it back to Bandora Tower?
Wait, in the final episode why did the Zyurangers entrust the baby dinosaurs to children?! Yep, no possible way that can go wrong. To be fair, the baby dinosaurs are the last pair of dinosaurs on Earth, and should the eggs they were hatched from be destroyed, then the dinosaurs would be forever extinct from the world.
To be both smart AND fair, the baby dinosaurs should've been given to scientists or the authorities.
Harsher in Hindsight: Remember at the beginning of episode 6, when Geki gets transported to that strange land by Guardian Beast Tyrannosaurus, and sees the toppled Tokyo Tower? Well, let's all remember a certain travesty that took place in Tokyo years later. It was the earthquake/tsunami.
Nightmare Fuel: Dai Satan and his laugh. Just the idea of a big blue floating head in the sky!
The process of summoning Dai-Satan. First, 13 children at 10 years old get sucked into anything that has a reflection. Then they're all sealed while being aware into a tall, disturbing tower, with their face and hands visible, and suspended there, to be sacrificed for Dai Satan himself. That and during the process of summoning him, Bandora is supposed to be weakened and near death as she continues the ritual and to top it off she screams that she's gone blind and we clearly see blood running from her eyes, she does get restored to normal once she successfully summons Dai-Satan.
Zyuranger in general is one of the scarier seasons of the series. And this is a season with heavy focus about kids. You know, for kids!
Newer Than They Think: The tradition of having all the Sentai titles end with the suffix "-ranger" actually began here. The only shows prior to Zyuranger to have the word "-ranger" were Goranger and Turboranger (and even then, the former actually used "Gorenger" on the show). In fact, 9 of the 15 shows prior to Zyuranger actually ended with suffix "-man" (starting from Denziman and all the way to Jetman).
The Problem with Licensed Games: The Zyuranger game for the Famicom had some weird ideas on how to adapt its source material. For example, one segment involves Daizyuzin facing off against Dragon Caesar in a deadly match of table ping pong.
Tear Jerker: Burai's death. Kai's death may also qualify.
A late episode when the imitation Zyurangers appear may count. For the first time in Sentai, rather than creating evil imitations for solely fighting the Sentai, this one is used to make Zyurangers look like bad guys, and it shows when a mother slapped Mei right on the face when she's just helping a kid, followed by the people throwing stones to the Zyuranger and driving them away. Hell, to hammer it home, aside of the lamentations of the heroes, we're also given with the second time Mei is visibly crying (the first time is when Burai died). Of course, by the end they came back to life, but before that, it was a pretty powerful scene too.
Bandora's sobbing fit when Kai dies for the second time.
Too Cool to Live: Burai. To the point where fans tried to start a letter writing campaign to bring him back. It didn't work.
The Woobie: Again, Burai. Even long after his Heel-Face Turn, it is revealed that he was killed by natural disaster while suspended in animation and given only a temporary extra life by Clotho under Daizyujin's orders. And if that isn't depressing enough, we soon learn that, for unknown reasons, he could not be revived after dying a second time, despite his efforts to stay alive while using up the remainder of his life outside the Lapseless Room where he could remain alive, only to have it destroyed by Bandora. Burai could easily have the most tragic life in the entire Super Sentai franchise. However, even if Burai is pretty justified for angsting about that, he instead takes the path of Iron Woobie, he'll use his short time to help Geki when he can, and when he's nearly dying for real, he uses his time to befriend and protect a similarly dying boy even at cost of his... limited time.