That should NOT apply.
We have no canonical evidence the Knight has 0 DEF, because to see the Knight has 0 DEF, you have to go into the files directly; Normally, seeing stats is done via CHECK, but....
- [Check]
- Kris analyzed the enemy!
- But Kris couldn't learn anything.
- [Check, subsequent uses]
- Kris points into the distance.
- Nothing happened.
Given we have no info on The Knight's ATK nor DEF that the audience is meant to have access to, we should not treat it as having 0 DEF, because we specifically aren't given info on what its DEF is.
Also, yes, its actual in-game DEF is 0, but besides that we, the audience, aren't given access to that info, in-game stats often differ from CHECK Stats.
For example, Rudinn:
For example:
Ponman (plural Ponmen) is a Darkner enemy in Card Kingdom that appears at the Great Board. They are based on pawns from chess. They resemble the Dark Ponman hazards that appear in Forest and Card Castle.
deltarune.wiki
DF
- 1 (Actual)
- 0 (Check)
- 5 (Recruit)
The Actual DEF you have to go into the games to find can differ from the stats shown in CHECK with many enemies.
Many Chapter 1 enemies are listed with 5 DEF in the Recruit info for some reason, but Recruit also feels BARELY more lore-relevant, since it gives not only a description & stats listing like CHECK does, but it also gives Element, Level & Likes & Dislikes.
So we have that info from RECRUIT we can consider for many.
Personally, while I believe The Knight is very strong & potentially quite intelligent, my stance is The Knight is more or less 5 times superior to The Delta Warriors, but can not casually one-shot them.
Reasons include:
1. When The Knight takes over 100 damage in a single hit, it will yelp & its form will destabilize, neither of which it does when taking less than 100 damage. This is normally not audible when Rude Buster hits it, but it can be heard otherwise, such as from Kris, who hits harder the more party members are down,
indicating Kris can harm The Knight when not holding back, & so can Rude Buster.
2. Even against Susie & Ralsei (Ralsei may have to DEFEND.), none of The Knight's attacks can OHKO them in a single hit. Tracking Swords, despite being meant as very hard hitting moves, can have 1 hit survived by Susie for example, without her even Defending; It takes multiple hits to DOWN them, so it's not a "casual one-shot".
3. SWOON behaves more like a status condition. Besides negative HP setting not aligning to damage dealt to go DOWN in general throughout Deltarune, which puts into question that it does 999 damage only when it DOWNs them yet doesn't when it hits them while they're UP, SWOON also prevents their passive regeneration.
4. Rotating Slashes 3/"Your heart becomes twisted" is made to be unavoidable by being in both Phase 3 & Phase 4 in case the party lowers its HP very fast, & featurs the Knight spamming slashes in its animation.
5. If The Knight could casually one-shot them, why would it bother to spend a turn charging up an attack as it does?
6. The ending of the fight suggests it knocked them out in the cutscene because The Light Warriors' guards were down. Consider this dialogue when The Knight is 1 hit from defeat (& it wasn't no hit.):
- The enemy suddenly let down its guard! [After using its final attack]
After the fight, it SWOONS Susie while she's busy taunting & laughing & then Ralsei when he's in shock looking at what was just done to Susie. Ergo, taken down when the enemy let down its guard. The Knight's ending dialogue establishes that when someone's guard is let down, that's an opportunity to DOWN them, & that's how it takes down Susie & Ralsei.
Not to mention, they just finished a fight that was so arduous Susie couldn't believe they won. (& if The Knight was faking having its guard down, or faking its destabilization, that could support this being a way to get their guards down.)
7. Although The Knight's HP is displayed as ??? & we aren't shown its ATK & DEF, we are shown its health bar; We can infer from how much can be depleted how comparable The Delta Warriors are. (In game, it's about 20% of its max HP, which aligns with the damage reduction starting at damage reduced to 20%, with 1% of damage doable being regained per turn.)
8. As soon as a substitute for Toriel (Undyne) shows up, The Knight takes that & leaves.
9. The Knight spends most of Chapter 4 attacking while avoiding direct confrontation. Breaking stairs Susie could use to approach it, attacking them while they're climbing, attacking them while they can't see it in pitch darkness, summoning a Titan to fight them.
Sorry if anyone minds the long post.
TL;DR - The Knight having 0 DEF isn't something the audience is shown, our standards say we should use, I advocate for scaling it as about 5x superior to The Delta Warriors because of its visible Health Bar depletion & initial 20% Damage Reduction, also The Knight cannot "casually one-shot" The Delta Warriors even though it is very strong & unironically, truly & genuinely is not a fraud.