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.
And then there's "Eternity," taken directly from Blue Dragon. It's sung by Ian Gillan of Deep Purple. The song's meta-info for the artist even says "jesus christ the guy from deep purple sang this." See the Blue Dragon entry for more info, but it garners the exact same reactions here—which is certainly why it was used.
Demonic Spiders: Dread Refs appear as a miniboss in the first dungeon, and then as normal enemies later on. They can summon more Dread Refs, and also inflict foul on you, making you miss a turn. They also have a relatively strong, multi-hit attack.
Good Bad Bugs: While enemies don't typically respawn, it's possible to make them respawn by saving, quitting to the title screen, then loading the save file. Using this it's possible to grind for more money and experience.
Although the meme of combining the main Space Jam theme with other songs was around for years before Barkley, Shut Up and Jam: Gaiden was released, the game popularized it, and any images that accompany a given mashup will almost invariably have Charles Barkley's face be poorly photoshopped into them in homage of the game.
Any time Barkley, Shut Up and Jam: Gaiden is mentioned in any particular context, a disclaimer will usually be put at the top or near the beginning with wording along the lines of:
WARNING: THE (NOUN) YOU ARE ABOUT TO (VERB) IS CANON.
Nightmare Fuel: By using horror tropes, the Sugar Caves manage to turn sugar, of all things, into a sinister hazard.
Scrappy Mechanic: The save pump rants stop being funny after the fiftieth time you've had to sit through them. And by fast-fowarding through the rants you'll risk stumbling into the save menu and overwriting file 1 even if for some reason you didn't intend to. Couldn't the developer have placed his hatred of fanboys somewhere less vital than the fucking save points? Of course, being highly irritating is the point. The final pump actually quizzes the player about the rants done through the game!
That One Level: It is laughably easy to die in the Sugar Caves. Get used to reading "The...the sugar...granules everywhere! Ugh!"
The Untwist: The Ultimate Hellbane being Balthios. If he gets a status effect on him in battle, it refers to him as Balthios. His character portrait is also the same, but in silhouette—and then there's the fact that he even has a portrait in the first place. To make it worse, they refer to Balthios as an octoroon in his introduction, and then not two scenes later, before he even leaves the building, one of the two words they use to describe The Ultimate Hellbane, a cloaked, mysterious figure that is a complete enigma, as an octoroon...