* SugarWiki/AwesomeMusic: [[https://www.youtube.com/watch?v=_5tIywAtfVE Kimi mo Seishun wa Kagayaiteiru ka? (Does Your Youth Shine?)]]
**The sound track as a whole can be called this actually.
* CompleteMonster: God Neros, the BigBad of this {{Tokusatsu}} series, 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: Metalder was the most poorly received of all the Metal Hero 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.