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.
Sacred Cow: In retrospect this might show that the game is a bit of this.
Idiot Plot: Pretty much the only reason the plot moves forward past the second world is because both Theo and Marina act like complete morons.
Narm: Lunar's ending line upon destroying the Cerberus Alpha:
"How could I lose to you?!"
Narm Charm: Most of Lunar's other lines, and indeed the dialogue from everyone. Special note:
Lunar: THROUGH FIRE, JUSTICE IS SERVED!
Nightmare Fuel: Everything on the planet Clancer has the same twisted frozen face. Everything. This is made even worse if you consider the fact that said face resembles a haniwa.
That One Boss: It's more like Those Two Bosses. Both Lunar and Merco are fast and aggressive in their mechs, but the real challenge is defeating each without taking damage. These are often described as the hardest Gold Gems to collect in the game.