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Undertale/Deltarune Wiki

@undertale.wiki

Your resource for Undertale/Deltarune knowledge! undertale.wiki deltarune.wiki (Not affiliated with Toby Fox or the Undertale/Deltarune team.)

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Undertale/Deltarune Wiki @undertale.wiki · 02/05/2026

NPC fans rejoice! We worked on documenting every minor character in Undertale/Deltarune, and your favorite NPC should now have an article on the wiki. undertale.wiki/w/Category:N... deltarune.wiki/w/Category:N...

The "Rock" page on Undertale Wiki (https://undertale.wiki/w/Rock), with the infobox showing a rock sprite, "Appearances: Ruins", the quote "WHOA there, pardner! Who said you could push me around?" by the Rock, and the introduction paragraph stating "The rock is a minor character in Undertale. They obstruct one of the puzzles in the Ruins."

The "Pair of eyes" page on Deltarune Wiki (https://deltarune.wiki/w/Pair_of_eyes), showing a pair of eyes as the infobox sprite, "Classification: Darkner", "Appearances: Card Castle", the quote of "And I'm just a pair of eyes!" by the pair of eyes, and an introduction paragraph stating "The pair of eyes is a Darkner found in the prison of Card Castle during Chapter 1 of Deltarune."

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Undertale/Deltarune Wiki @undertale.wiki · 01/04/2026

Your response has been amazing, and we're glad pronoun information has helped so many people! We extended this documentation to Undertale Wiki, and we also- wait, what?

Kris Dreemurr infobox on https://deltarune.wiki/w/Kris_Dreemurr. On the top are shown Kris's Light World and Dark World sprites, and under the "Character information" section are fields "Classification: Lightner", as well as "Pronouns: they/them" with 59 citations. Citations [2], [8], [15], [34], [46] and [54] are absent, with blanks in their place.

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Undertale/Deltarune Wiki @undertale.wiki · 23/03/2026

Seeing popular searches for terms like "dialogue", "code" or "mods", we collected some useful resources for researching more about Undertale or Deltarune. We used them as editors, so we hope readers would find them useful too! undertale.wiki/w/Undertale_... deltarune.wiki/w/Deltarune_...

An excerpt from the wiki page at https://undertale.wiki/w/Undertale_Wiki:Resources. It reads:

== Dialogue ==
Resources that are complete or semi-complete listings of Undertale dialogue.
* Undertale text dump, by HushBugger
* The UNDERTALE/DELTARUNE Dialogue Compendium, by InactiveSnail
* Undertale and Deltarune text projects, by The Compiler

=== Generators ===
Resources that can be used to generate Undertale dialogue.
* Undertale and Deltarune text box generator, by Demirramon

== Datamining ==
> Main article: Version differences
These tools can be used to inspect or modify Undertale source code.
* Undertale script viewer, maintained by the Undertale/Deltarune Wiki team for wiki references
* UndertaleModTool, for modding and viewing assets, by the Underminers team
* Undertale version switcher, by Jacky720
* Undertale Random Encounter Rates, by OceanBagel
* Undertale Encounter Step Counts, by OceanBagel

== Save data ==
> Main article: SAVE § Save Data
These tools allow modifying SAVE data, such as the protagonist's stats, items, location, or other game flags.
* Flowey's Time Machine, by crumblingstatue, Jacky720, Tarık Coşkun and other contributors
* Undertale SAVE files, by HylianAngel

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Undertale/Deltarune Wiki @undertale.wiki · 20/10/2025

[FLASHING] There are 60 Shadowguys and Pippinses total dancing in the Cooking Show area, roughly split as 40S:20P (numbers and placement are random). A single Zapper is supposed have a 10% chance of appearing, but a bug, as well as curtain placement, prevent this. Here's how that would look like:

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Undertale/Deltarune Wiki @undertale.wiki · 21/09/2025

We're soon working on a page documenting the information revealed in the Undertale 10th anniversary stream. For now, though, it contains this important information.

Trivia section of the 10th Anniversary Stream page that contains a single trivia point saying "Clairvoire drew dog food."

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Undertale/Deltarune Wiki @undertale.wiki · 26/07/2025

(Chapter 4 ending spoilers) If the scene with the split screen between Kris and Susie is modded to move Susie's view a bit to the right, Kris's face can be seen from outside the house, watching from their room window.

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Undertale/Deltarune Wiki @undertale.wiki · 24/07/2025

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Undertale/Deltarune Wiki @undertale.wiki · 12/07/2025

Miss Mizzle has different dialogue when flirting with her after flirting with the second Watercooler in Chapter 3. However, we just discovered that this doesn't happen if you talk to the NPC behind the Watercooler. This makes for some highly specific dialogue criteria. deltarune.wiki/w/Miss_Mizzle

Wiki page for Miss Mizzle showing the quotes from the "Flirt" ACT under the Quotes section. First line is always "Romantic are your words…", but under the condition of "If Kris has Flirted with the second Watercooler enemy prior without talking to the third Curtain NPC after" the dialogue continues like:
- "Too romantic! Have you FLIRTED with another WaterCooler?"
- "Wipe your mouth before you speak with one as I,"
- "For your phrases, soggy with experience,"
- "Dribble like shiny oil from your lips."

Miss Mizzle's wiki page listing the quote "Disgusting." under the Quotes section, obtained under the condition of "BegForMercy and Flirt second repeat, or Flirt first repeat if Kris has flirted with the second Watercooler without talking to the third Curtain NPC after".

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Undertale/Deltarune Wiki @undertale.wiki · 04/07/2025

So, we recently added pronouns used for characters into character infoboxes on Deltarune Wiki. We hope this information comes in handy! deltarune.wiki/w/Kris_Dreem...

Character infobox on the Kris Dreemurr article on Deltarune Wiki (https://deltarune.wiki/w/Kris_Dreemurr), with a Pronouns section that states "they/them", followed by 47 references.

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Undertale/Deltarune Wiki @undertale.wiki · 02/07/2025

Hi! We're going to start posting in the future about tiny discoveries we make on the wiki, new features or funny edits. We should start by mentioning that we moved away from our previous wiki host, Fandom, back in April, and are now on undertale.wiki and deltarune.wiki. But you probably know that!

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