These are what we call the 'YMMV items.' Things that some people find in this work. We call them 'your mileage might vary' because not everyone sees these things in the same way. This starts discussions in the trope lists, a thing we don't want. Please use the discussion page if you'd like to discuss any of these items.
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
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 girlYakumo, 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.
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
Ear Worm - Battle Play, the original Japanese OP, the English theme, and the Japanese BGM.
God-Mode Sue - Mushra is the reincarnation of an actual galaxial god, and guess what form he returns to at the end of the series? It's even called God Mushra in the original version.
Narm - When becoming Mushrambo for the first time, Mushra absorbs his friends' cards... through his chest. It almost killed the Moment Of Awesome.
Purity Sue - Not so much in the original, but the dub will go on and on about how Yakumo's so loving and the embodiment of love and how her love will illuminate the world, etc.
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.
They Wasted a Perfectly Good Plot: The story seems to be rushed, especially during the Bird type Enterran and Kardians arcs, several would be important characters are unceremoniously killed and several element seem to be Ass Pull types especially Mushra's true nature as a Celestial Guardian without any hint of it previously.