Badass Decay: Averted with Burai. Despite being benched until the last minute in fights, he still manages to be awesome.
Broken Base: Between those who thinks Zyuranger on its own is awesome, links with Mighty Morphin' Power Rangers notwithstanding, and those who thinks that the series qualities decrease because they are going to see a lot of helpless little kids considered The Scrappy series-wide because Bandora specifically targets them.
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.
So much so that it now has an American DVD release!
Harsher in Hindsight: At the beginning of episode 6, Geki gets transported to a strange land by Guardian Beast Tyrannosaurus, and sees the toppled Tokyo Tower. Tokyo was badly rocked by an earthquake/tsunami many years later.
The first closing theme contains the line "Earth is round and blue. That's something everyone knows" long before the recent reemergence of the flat Earth believers into popular consciousness.
Hype Backlash: As time went on more people started coming out to reveal they don't actually like the series, while it is still looked at favorably it isn't looked as good as it used to be.
It Was His Sled: The final fate of the Dragon Ranger is probably the most commonly pointed out difference between Zyuranger and its American counterpart.
Jerkass Woobie: It's hard not to feel bad for Bandora when her backstory is revealed near the end of the series. Kai brought his death upon himself but Bandora is still a grieving mother lashing out at the world in anger. Then Great Satan revives Kai and Bandora is so overjoyed she tries repeatedly to hold him in her arms, only for Kai to slip away, taunt her for thinking they can still be happy together, and even declare that he's no longer her son. Bandora only gets to hold him again when he's dying a second time.
Narm: So, so much. It doesn’t help (or rather, does help) that bandora is Arabic for ‘tomato’, and Witch Bandora’s Villain Song is clearly influenced by Arabic music (she even does a little shoulder shake!).
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.
One notable instance is that even without pausing at the closeups of the stored Dino Bucklers, it's clear that the elaborate backsides are merely stickers, hence the toys. It's why, in their later appearance in the crossover movie with Kyoryuger and Abaranger, the Dino Bucklers' props were actually the Legacy Power Morpher toys, albeit relabeled with the appropriate show label on the front, where the backs' designs were molded in and painted.
This makes a lot of sense when you learn that the arrangements of the opening and ending themes were done by Kenji Yamamoto, whose serial plagiarism got him fired from his role as composer for Dragon Ball Kai and got his soundtrack for the Dragon Ball Z: Budokai games replaced in the HD rerelease.
What an Idiot: Dora Sphinx, who fell for the Zyurangers tricking him into revealing that the snake head on his crown was his weak spot.
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.