* SugarWiki/AwesomeMusic: [[https://www.youtube.com/watch?v=GnuwVrGBecs The theme song]] can be repetitive in places, but multiple fans cite it as part of the reason they remember the series years after watching it. The show's assorted orchestral music, and [[https://www.youtube.com/watch?v=YFI_DFKuJHYthe updated theme song that shows up in later episodes]] are also well-regarded.
* CompleteMonster:
** [[BigBad The General]] is the sociopathic cyborg who is responsible for the [[AfterTheEnd post-apocalyptic]] state of the Earth throughout the series. Developed a century ago to fight against an army of beings called the Gigantors, the General quickly [[AGodAmI developed a god complex]] and obsession with destiny, and led an uprising against humanity to conquer the world, leading to mass destruction and chaos. Though seemingly defeated by the great hero Eon, the General was rebuilt 100 years later by his servants, and immediately restarts his campaign for conquest by dispatching dozens of CDF soldiers before reactivating one of the [[LostSuperweapon Gigantors]]. Using the Gigantor, the General crushes all in his path, planning to annihilate all those who stand against him, and coldly executes the loyal Khan for [[EvenEvilHasStandards expressing disgust]] at the General's disregard for the mass casualties he plans to cause. When [[TheChosenOne Marty]], the last descendant of Eon, confronts him, the General attempts to painfully kill the boy while [[ForcedToWatch forcing his friends to watch]], even mind-controlling one of them into attacking Marty for him, before finally losing all his previously smug composure to rant about his plans to plunge the world into darkness to fulfill his destiny. Vicious and cruel beyond compare, the General was [[TheDreaded feared across the world]] for good reason, and stamps himself in Earth's history as the greatest threat it ever faced.
** [[MadScientist Dr. Chen]], one of the General's two CoDragons alongside Khan, is a diabolical genius bent on reviving the General and taking over the planet alongside him. Originally a high-ranking CDF scientist who was demoted for his unethical experiments, Chen betrayed humankind to rebuild the General and began collecting his scattered parts through any means necessary. To ensure the General would go unopposed when revived, Chen and Khan order the entire Eon family bloodline exterminated, leading to the deaths of numerous innocents, and Chen regularly orders the deaths of innocents throughout the series. After manipulating the arrogant Von Rhyner into reconstructing a Gigantor for him, Chen [[YouHaveOutlivedYourUsefulness orders the man and his entire staff to be disposed of]], and, once the General is revived, Chen gleefully pilots the Gigantor to destroy any opposition to the General, and tries to murder the young girl Ally when she attempts to shut down the mechanical monstrosity. Dr. Chen was a slimy scumbag who was willing to doom countless innocents out of nothing but [[ItsAllAboutMe ego]] and [[ForScience scientific curiosity]], and is responsible for most of the evil in the series.
** [[PsychoForHire Scar]], a twisted madman who serves the General simply to get to hurt people, was the one commissioned to wipe out the Eon bloodline, and he gleefully hunted down each and every member of the family and slaughtered them, nearly claiming the life of a then-infant Marty as well. In the present, Scar attempts to torture a captured prisoner for information, and later tracks down a now preteen Marty, at which point he confronts Gaff, the Eon family guardian, whom Scar viciously mocks regarding his massacre of the Eon bloodline, even fondly recalling their screams as he cut them down. When he eventually confronts Marty by slaughtering his way into a hospital, Scar continues his [[EvilGloating boasts of glee]] at killing the boy's family, and implores the boy to stay conscious as he assaults him, noting it won't be as fun to kill him if he's not awake. Though a minor villain in the grand scheme of things, Scar stood out among his fellow villains as the only purely {{sadist}}ic individual who regarded killing and hurting others as rewards in themselves.
* CultClassic: While the series never became really popular, it had a small yet fairly devoted fanbase. Those who remember ''Iron Kid'' usually only have good things to say about it.
* EnsembleDarkhorse: Shadow. Although he doesn't appear until at least half of the series, his stylish design, distinctive fighting style and interesting personal arc turned him into the most memorable of the good guys. During ''Iron Kid'''s runs in RTVE, he and Marty himself were the only characters people who didn't properly follow the series could recognize.
* TooGoodToLast: The series's fandom has been asking for a second season since its first run, especially given the blatant SequelHook of its ending, but it appears that both BRB Internacional and Daewon Media completely forgot about ''Iron Kid'' after its production.
* SugarWiki/VisualEffectsOfAwesome: Unanimously held as one of the best points of the series. The fights are acknowledged to feature excellent choreography and the CGI looks still neat more than a decade later.
* WhatDoYouMeanItsForKids: The series targets children and it can be noted in the animation style and character designs, but the story doesn't shy away from violence and death. The General and his cronies are very clearly explained to be genocidal war criminals who destroyed human civilization and butchered Marty's family.