In terms of brutality, I'm talking like the final fight in Kuuga. Lots of blood and two men beating each other to death. Nudity is something we don't see very often in this series, so that is somewhat of a non-factor unless it pops up.
Blood does show up in this series, but we can't abuse the label for every little scrape or cut characters get, they need to get hurt REAL BAD for that.
Kuuga, Agito, The First, The Next, and Shin all have the advisory label, along with one specific Ryuki episode. I removed it from Gaim though. The only blood there is minor cuts, and Hase, Sid and Takatora's deaths weren't gory.
I have some doubts on whether this Template can be used on Ranger Wiki.
Not many instances I can recall that raise a red flag.
Gaosilver bathing in the hot spring, Shinkenred being stabbed by Juuzo, and Choujin Sentai Jetman.
I think the most violent scene in KR that I have seen (it shocked me) was Kuuga's last battle. However, Shin was also kind of scary because of a guy mutating grossly into a grasshopper. It is inapropiate in my opinion.
And Gaim. It is indeed dark but not sufficiently bloody or violent to be added into this category. The most bloody scene in Gaim has been where Kaito's arm was hurt by Redyue and blood fell from it. However, it was instantly. Probably that one episode should get the warning template but not the whole series.
About Sentai. There have been bloody, violent, and weird scenes in it as well. (eg. Abaranger EP48, when Mikoto Amano died he released a lot of blood from his body, mouth. He was covered in it. Or GaoSilver's bath.) And I don't think Takeru being stabbed by Juuzo such a traumatic scene as Mikoto's death.
Regarding Sentai: I think the only other series aside from Jetman that deserves the "advisory" warning is probably J.A.K.Q. The show, particularly early on, is really dark with a lot of deaths much more "adult" spying scenarios than what it eventually becomes (even if Sentai is typically seen as more cartoonish than Riders); let alone we have other adult matters to tend to...like the Nazi monster during the later period with Big One. Otherwise other than sometimes disturbing imagry, I don't see the need with Sentai.
Well, Garo Wiki's are placed based on my watching of the show. But I understand if that is not enough to go on...
Metal Heroes ....we don't have enough data to confirm anything... I did see a clip of Jiban using his Perfect Form...really non-kid friendly seeing bad guys get shot up by a machine gun fire..but that was just one episode.....
Aside from Kikiader, Zubat and Tokupedia...We don't need this anywhere else..buuut better safe than sorry...