* SugarWiki/AwesomeMusic: [[https://www.youtube.com/watch?v=1JuAFiNmuNg The main title]] is suitably epic. The background music when Jade brings all five battlemoons into the fight with Remorrah also qualifies and is a fan favorite.
* BaseBreakingCharacter: Femur. Fans of the show generally can't decide amongst themselves whether he is an [[TheScrappy obnoxious line-stealing distraction]] from the main plot, or a [[PluckyComicRelief much needed comic relief character]] in an otherwise nihilistic cosmic horror series.
* CompleteMonster: [[CoDragons The Beast Generals]], the malevolent servitors of the world-devouring [[BigBad Beast Planet]] who help their master [[GreaterScopeVillain The Beast]] scourge entire solar systems and destroy all worlds within them, each qualify in their own right:
** [[ManipulativeBitch Lamprey]] is a master of deceit and subterfuge who weakens worlds from the inside out through complex gambits, occasionally pausing to murder people who cross her path for little other reason than [[ForTheEvulz to amuse herself]]. Lamprey introduces herself tricking Emperor Femur into installing a device meant to drain all the life from Planet Bone. After this, Lamprey possesses Tekla and tries to use her to destroy the Alliance from the inside out, contenting herself with subjecting her to horrific MindRape of her planet's destruction and trying to slowly kill her from the inside once this fails. After this fails, Lamprey murders a resident of Planet Fire and pins it on Jade's hands, intending for her to be horribly executed by being dipped into a fall of lava. Lamprey's final crimes in the series [[EvilIsPetty stem purely from petty spite]]: Seeking revenge against Tekla, Lamprey has her Beast drones attack a bar with the intent to kill everyone inside, personally disintegrates Captain Blaze once he gets in her way, and furiously attempts to kill everyone who stands between her and Tekla before her own demise.
** [[TheBrute Blokk]] is a brutish warrior who firmly believes in the power of absolute force over everything else, preferring to overrun worlds through his armada to destroy all they see whilst basking in the carnage. Blokk's repeated attempts to attack the planets in the Cluster result in numerous deaths and the successful destruction of Planet Jungle. Blokk personally attempts to trick Cryos into killing his own daughter whilst leaving his planet vulnerable, and grows more and more vicious after his repeated punishments at the hand of the Beast. In the finale of the series, Blokk takes over Planet Rock by force by besting and [[HeroKiller killing Lord Mantle]], while promising to give the Alliance members he's captured--[[WouldHurtAChild two children among them]]--a slow death at the Beast's hands. Once he's left stranded on Rock, Blokk slaughters his way to Rock's World Engine, personally executes [[MauveShirt Feldspar]], and sets the entire planet on a collision course with the nearest star out of sheer spite.
* DarknessInducedAudienceApathy: Nothing the heroes do has any chance of destroying the Beast Planet; if anything, they kill as many innocent people as it does.
* GeniusBonus: As with all Creator/MainframeEntertainment productions, classic quotations and references abound throughout the series, particularly in episode titles. ''J'accuse'' deals with a murder accusation against respected soldier Jade and ''Ragnarok'' brings about the end of the traditional Cluster society. As with WesternAnimation/ReBoot and WesternAnimation/BeastWars, Mainframe shows that being a children's show does not mean intelligence is left at the door.
** A sci-fi CosmicHorrorStory about an unstoppable mechanical EldritchAbomination where the heroes have to unite a divided galaxy to fight the looming threat? [[Franchise/MassEffect Sounds familiar]].
** A mechanical monster planet whose first shown act is eating a world of living robots, only to have their one survivor deliver exposition on its identity to the heroes later? [[WesternAnimation/TransformersTheMovie Deja vu]].
%%* ToyShip: Pyrus and Zera.
* SpecialEffectFailure: Since the CGI is very 90s, there are plenty of stand-out moments such as:
** Several explosions just shrinking out of existence.
** Destroyed machines disappearing ''without'' being obscured by an explosion or laser beam.
** 2D explosions that look more like a green screen effect than CGI.
** When Prince Pyrus catches his falling staff in Episode 3, the staff just poofs into his hand.
*** In the same episode, when Graveheart "jumps" across lava while holding King Cryos, the former appears to still be running instead.
*** Also when Pyrus drops a bridge with Beast Drones on it into lava, both the bridge and the Drones simply disappear in orange clouds instead of splashing into the lava.
** [[https://youtu.be/cTWS3ui588w?t=8m3s Episode 4]] has a boulder shattering...but it just disappears while shards fly away from where it had been.
*** Later in the same episode, Femur summons holographic ships. The first three materialize properly, but then several more just poof onto the screen.
*** The same scene has a Beast Drone fly in front of the life-draining device, causing it to briefly disappear instead of simply being obscured.
*** Then when same life-draining device is destroyed, it shatters into pieces in front of an unconvincing [=2D=] explosion.
* UncannyValley: The CGI has ''not'' aged well.
* WhatDoYouMeanItsForKids: A CosmicHorrorStory... aimed at kids. Tons of horrific imagery, violence, death, and the onscreen obliteration of entire planets and their inhabitants beside the general premise. [[spoiler:Even the ''ending'' is depressingly bleak, although this is more fault of being CutShort.]]