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.
The song has been remixed with just about any song in existence underneath it. Like "Libera MeFrom Hell" or "Objection:Cornered". It has something like the same reputation as Guile'stheme, for its ability to go with anything.
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.
Fan Dumb: Parodied by the Pumps, who spew long, pretentious rants at you about the superiority of Japanese "vidcons" whenever you're trying to save your game.
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.
Quad City DJs vs. something mashups of the Space Jam theme, in the tradition of the main theme, the titles and descriptions of which (on YouTube at least) often allude to the game in some way.
Moral Event Horizon: Michael Jordan is pretty bad from the start, but he comes across as a Well-Intentioned Extremist, if one with an emphasis on theextremist, until you reach the church for the second time, Jordan's already fatally wounded Larry Bird, and he is threatening to kill Hoopz. And if it's not that, it's infecting Hoopz with Type 2 diabetes after your trek through the Spalding building.
That One Level: It is laughably easy to die in the Sugar Caves. Get used to reading "The...the sugar...granules everywhere! Ugh!"
Unfortunate Implications: Cuchulainn's Tomb. With no foreshadowing beforehand, we learn that Charles Barkley's tragic flaw is his love for gold...for some reason. Subverted in that the implications were almost certainly intentional.
The Untwist: The Ultimate Hellbane being Balthios. The main reason being, if he gets a status effect on him in battle, it refers to him as Balthios.