- Iwamoto: [obseving Yusuke's return to school after being dead] It doesn't make sense. He's like a cockroach. But one day - oh, I'll squash him.
- Yusuke Urameshi: [having been whacked on the head by Boton] Two questions: One, are you sure you're the Grim Reaper; and two, did I agree to this Spirit Detective thing?
- Yusuke Urameshi: Get off of me, lughead. I didn't do it.
- Iwamoto: Don't lie!
- [emphasizing the word "lie" by punching Yusuke's face]
- Takanaka: [outraged] Mr. Iwamoto! I trust you found evidence before punishing.
- Iwamoto: Yes. All the evidence I need, Mr. Takanaka. There was no trouble at school while he was gone and the minute he's back - look what we have. This poisonous weed was the only student skipping gym when the items were stolen. Must have learned this trick from his tramp mother.
- Koenma: [as Yusuke's about to punch Mr. Iwamoto] Yusuke!
- Yusuke Urameshi: Koenma?
- Koenma: Have I got a big case for you! Three criminals have stolen the great artifacts of darkness from my father's vaults, made slush out of the guards and escaped to the living world.
- Yusuke Urameshi: Can't you see I'm busy with this asshole here?
- Koenma: It's your Spirit Gun.
- Yusuke Urameshi: My what?
- Koenma: A human being, as I've explained before, emits both body and spirit energy. While a ghost, you became more aware of your spirit energy and can channel it into you finger, hence "The Spirit Gun." It's far more powerful than a normal punch, but until you increase your spirit muscles, so to speak, you can only use it once a day.
- Botan: [livid and storming in] You must be out of your mind!
- Koenma: Oh... uh... Boton! You came!
- Botan: Well, yes! Did you think I wouldn't when you send my best project to a pack of wolves? All three of these criminals are pushing out tremendous amounts of energy. They'll rip Yusuke into pieces.
- Koenma: Yes, yes. I understand the odds are against him. And I would have preferred to have started on smaller cases until his abilities grew. But with this new case, I-I-I had no choice.
- Jaganshi Hiei: Surely you're not dropping out of the game when we've come this far?
- Youko Kurama: Yes.
- Yusuke Urameshi: Hey, don't leave yet, you guys, I just got here. So much for manners.
- Goki: Heh-heh-heh-heh-heh-heh-heh. Don't feel bad, kid. I'm much more polite than those two brats. I'll turn myself in nice and neat if I can't rip off your head.
- Yusuke Urameshi: Tha' sounds like a deal. Just don't pull my hair.
- Goki: People don't realize how hard it is to eat human souls. You gotta cook the humans so they taste good but not enough to kill them.
- Goki: [towering over Yusuke, threateningly] Do you know what the best spices for a soul are? Some fear and a dash of pain. Ah ha ha ha ha...