The Mysterious Cities of Gold/YMMV


 * Americans Hate Tingle and Germans Love David Hasselhoff: The very, very, very different fate of the show in its two countries of origin: obscure, rapidly forgotten show in Japan; and a generation-defining classic in the French-speaking world.
 * Also, while the show is entirely set in Latin America, and a Spanish dub exist, it was never broadcast, aside from some Latin America channels. Undestandably, as Spain conquistadores are the Big Bads.
 * The Spanish being the big bads is actually very debatable. If anything, the Olmecs are the Big Bads while everyone assumes the Spaniards are the Big Bads. There have been shown to be plenty of despicable people on both sides, with Marinche, probably being the closest you can get to a Complete Monster in this series, is an Aztec. (Even the Spanish Doctor who's traveling with her is disgusted when she suggests poisoning a villages's river supply)
 * The whole show is very careful to reinforce the point that aside from the three children (and any other children they meet), very few are Black and White Morality "good guys". Aside from those mentioned above, at least one tribe of Native Americans tries to sacrifice the children, and even the fabled Heva civilisation ended up in a war of mutually assured destruction with Atlantis. Arguably the central conceit in giving the medallions to children at birth is because they would only use them for the right reasons.
 * On a whole other level of Americans Hate Tingle coupled with
 * Canon Sue: Mendoza's hyper-competence at (almost) everything almost puts him in this category. But mostly, he's just a cool guy for the Kid Hero to hang around with.
 * One notable (and rather amusing) exception comes to mind: in one episode, Mendoza uses his trickery to steal a cannon from the other Spaniards and bring it to the allied fort they're about to attack. Mendoza is confident the powerful cannon will hold the Spaniards at bay... until the time comes to use it and almost every single shot goes wide. Turns out he knew how to set the cannon up and how to arm it, but not how to properly aim the damn thing.
 * Oh, he knew how to aim it - . This leaves the plot to move forward, while avoiding the fact that sword and spear injuries are easier to bowdlerise than those made by a cannonball.
 * And not to mention, Mendoza's only there to get the kids out of situations they don't get out of themselves. The kids actually manage to outsmart him, even with the episode with the cannon. That said, in that particular incident it becomes clear for the first time that while his guile and cunning work well on the Spaniards, the natives tend to be inclined to shoot first and ask questions later (for very good reason, given the historical precedent).
 * There are several instances where Mendoza's planning and Batman Gambit strategy does not work out the way he intends. He's pretty adept at rescuing the situation via Xanatos Speed Chess, however - I don't think the children outsmart him so much as his adult predispositions lead him to try adult solutions (e.g. firing the cannon), which the children can circumvent (e.g by sneaking past the bad guys and using their own methods, which in later episodes usually involve fetching the Condor and scaring the bejeezus out of the antagonists).
 * Ear Worm: The theme tune. Doodoododo, ahh ahh ahh...
 * Gateway Series: For UK and other viewers outside North America this (along with Ulysses 31) was the Gateway Series to anime in the same way as Ranma One Half or Sailor Moon was for US viewers.
 * Getting Crap Past the Radar: "The Olmecs love children!" - though arguably as a dying race who require the life force of the children to keep their stasis strategy going, the line is played completely straight in this instance.
 * Nightmare Fuel (by children's TV standards): The Jade Mask. Dear God, The Jade Mask....
 * The documentary of a chicken's head being cut off in a children's show.
 * The BBC never screened the documentaries (which also contained re-enactments of sacrifice and grave-robbing), possibly for time constraints as much as content.
 * Squick: Maina is about the same age as the heroes, but she's engaged to a man who looks old enough to be her father.
 * Toy Ship: Esteban×Zia
 * Values Dissonance: Maina, a tween, is engaged to Viracocha, an adult man. Apart from Tao, who's disappointed she isn't available, everyone takes it in stride. Probably a case of Truth in Television; the concept of legal adulthood is a relatively new one and adolescents getting married was fairly common back then.
 * Hell, there's enough of it in The Bible!