* SugarWiki/AwesomeMusic: [[https://www.youtube.com/watch?v=_5tIywAtfVE Kimi mo Seishun wa Kagayaiteiru ka? (Does Your Youth Shine?)]]
** The soundtrack as a whole can be called this actually.
* CompleteMonster: [[BigBad God Neros]] is a truly vile EvilOverlord bent on imposing his twisted will on the world. In order to TakeOverTheWorld, Neros focused on mass starvation imposed on whole nations, along with [[KillAllHumans genocide of humanity]]; Neros had even murdered a friend who had protested Metalder being used for evil purposes. Having no limits to depravity, Neros tried to force Metalder to do evil, and [[MindRape mentally tortured]] him before trying to finish him off.
* PeripheryDemographic: Teens and adults enjoyed it more than the kids, which caused it to end after 39 episodes.
* VindicatedByHistory: This was the most poorly received of all the ''Franchise/MetalHeroes'' series by children. However, in both Japan and the West, the series is now regarded as the best ''Metal Hero'' show due to it's darker themes and plot elements.