- Anti-Climax Boss: Daku, Ryuma especially after Gyasa a lesser Mook lasted much longer than he did and Rusepine, as well as the rest of the Enterran Generals that only showed up as cards after the previous episode set them as equal to the past arcs' big bads.
- Complete Monster: Lanancuras was once a noble celestial god who guarded the Milky Way Galaxy, but eventually became a downright Satanic figure due to his lust for power. When he began to subjugate and destroy all lower beings, the other celestials imprisoned him inside a meteorite which later fell to Earth. From his prison, however, Lanancuras continued to spread his reach, brainwashing the King of the engineered Enterran race, Mushrambo, to annihilate every last human to prepare for his arrival. He selects Mushrambo to wipe out the last human city Shinzo and to kill the hibernating six-year old girl Yakumo, the latter of which backfires on him when Yakumo uses a portion of Lanancuras's own power to stop Mushrambo and splits the Enterran's soul in the process. When the timeline resets so that the war never happened, Lanancuras orders his Kadrian lieutenants to massacre humans and Enterrans alike for failing him. Even at his final defeat, he spitefully reveals that he had planned for this, as his demise as the cosmic embodiment of the Milky Way will mean the end of all life on Earth.
- Ear Worm: Battle Play, the original Japanese OP, the English theme, and the Japanese BGM.
- Ensemble Dark Horse: In spite of being in only three episodes, Gyasa is by far the most memorable of the villains in series, being one of the few Enterran villains to put up a good fight till the end. He greatly overshadows his boss.
- Evil Is Sexy: The Winged Humanoid Queen Rusephine and evil General Mushrambo in particular are very physically beautiful. At least until they transform themselves into monsters, and the outside starts to reflect the inside. Played straighter with Lunaria of the Kadrians.
- Narm: When becoming Mushrambo for the first time, Mushra absorbs his friends' cards... through his chest. It almost killed the Moment of Awesome.
- Squick: The Saban dub, particularly towards the end, likes to imply that Yakumo and Mushrambo are destined lovers. Mushrambo is either three people at once: a kid, a teen and a fat anthropomorphic cat merged together, or the guy who wiped out the human race and tried to kill her. She also has the sexual and romantic experience of a six year old.
- They Wasted a Perfectly Good Character: The Seven Enterran Generals, only four were ever shown in major details in the series, while the rest were turned into cards. The Enterrans in general count as several of the different mini arcs were very rushed, making the possibilities of animal Enterrans very limited.
- What Do You Mean, It's for Kids?: The series is a Shonen, was broadcasted in Fox Kids and marketed to children, but we are talking about an anime which shows nightmarish creatures and monsters, incredibly evil characters, deaths on screen including our main heroine, for reals and permanently at the end of the series, and some quite cynic moral aesops.
YMMV / Shinzo