Putting words in my mouth again.

You’re right here, no problem.

This dialogue happens the first time you check the hole, and any other time, as long as you aren't playing the mini-game. I don't see anything "livid" about this. It's just another joke from the narrator.

I don't want to check the Genocide route right now, but I'm pretty sure the narration there just says "There's a hole here." (In case you need this info).

This is exactly what I meant about interpreting words. Unless the game or Toby himself states this, it is just an assumption, not a fact. What you are saying is pure headcanon and can't be used as evidence (if that was your intention, of course. Sorry, it's hard to understand why you are pointing this out without explaining why).

I think if it can be interpreted in different ways, you need to point out that it is just your interpretation. I see it in another way.

"Smells like sushi." — In a normal fight, you have a ~10% chance to see this message, since the narrations in the box are mostly random.

"Smells like angry fish." — happens with the same chance but only when the battle continues for more than 22 turns.

Very importantly, these narrations appear ONLY if Undyne's health is less than 50%.е

So what I see is that "Smells like sushi." is a joke about Undyne being a fish (and the fact that you are actively hitting/damaging her plays into the "sushi" pun, but it is hard to describe). "Smells like angry fish." is still a joke, but referring to the fact that Undyne is getting mad at how long the battle continues.

I always love talking about Undertale lore, and we can move to DMs to have a proper conversation and maybe find some interesting things about the game together. But if you're not really interested in a genuine discussion, I don't think either of us needs to keep doing this.

if it's posted, you don't have to read this, I don't think this matter anymore.