Annoying Dog

I'm not snoring, I'm cheering you on in my sleep!!
...
Oh, you're still here?
Don't you have anything better to do?

Annoying Dog, after defeating Toriel in Hard Mode

The Annoying Dog (JP: うざいイヌ) is a small, white, smiling dog. It is Toby Fox's self-insert character.

The Annoying Dog shows up periodically throughout the game, most often around Papyrus. Whenever it shows up, it often somehow comedically ruins the characters' plans. It also appears in most trailers for the game.

Encounters

Altered or corrupted SAVE files

Annoying Dog sleeping in room_of_dog

Altering the room number in file0 to an inaccessible room results in the Annoying Dog appearing upon game launch, as the player is sent to room_of_dog. There are two versions of this room:

1. Dance of Dog plays as the Annoying Dog runs in place mid-screen. The song may change pitch upon closing and reopening the game.
2. mus_sigh_of_dog plays, and the Annoying Dog is sleeping in the center of the screen. This room has a 1 in 8 chance of appearing when the game is loaded.

The "Dogcheck" value checks for a valid SAVE and room combination and, if the value returns out of range, the Annoying Dog appears, and the player cannot progress. The player can enter some inaccessible rooms after using a hexadecimal editor to change the "Dogcheck" value.

The Gauntlet of Deadly Terror

The Annoying Dog hanging from a rope, as seen in the Gauntlet of Deadly Terror.

The Annoying Dog appears as a part of Papyrus's Gauntlet of Deadly Terror directly before Snowdin Town. The Annoying Dog dangles by a rope tied around its body.

Papyrus boss fight

The Annoying Dog biting Papyrus's "special attack" bone and one of the bones at Papyrus and Sans's house's sink.

The Annoying Dog shocked.

The Annoying Dog appears during the "special attack" sequence, munching on Papyrus's special "bone". After Papyrus gets angry at the Annoying Dog, it exits the bullet board, dragging the bone with it. It appears again when Papyrus does his "cool regular attack".

Papyrus and Sans's house

If the protagonist interacts with the sink in the kitchen, Papyrus comments on how he raised the sink so he could fit more bones beneath it. He then invites the protagonist to check inside. The cabinet door then opens to reveal the Annoying Dog chewing on one of the bones, before it runs out of the house as Papyrus shouts to get it. After it exits the house, Sans appears from his room (but not entirely out since he appears behind his door) and plays his trombone before going back inside his room, annoying Papyrus. Entering through the sink leads to the Dog Shrine if playing the console versions of Undertale.

Mettaton's third encounter

The Annoying Dog fused.

During the bomb defusal sequence, the Annoying Dog is a bomb that the protagonist can defuse. Its check text reads "blissfully unaware of its circumstances". When defused, the narration reads "Dog defused!" instead of "Bomb defused!", which is unique to the Annoying Dog.

THERE'S SOMETHING ANNOYING ABOUT THIS ROOM.
BUT I CAN'T QUITE PLACE MY FINGER ON IT....

Papyrus when called from the piano puzzle room

The Annoying Dog appears after completing the piano puzzle. Playing the right notes opens a secret door to the artifact room. Once the protagonist enters the room, the Annoying Dog appears in their inventory. If Papyrus is called in the artifact room, he notes there is something annoying about the room but cannot identify what, signifying the appearance of the Annoying Dog.

While trying to grab the artifact (with the Annoying Dog in the inventory), a message appears saying "You're carrying too many dogs." Using/Dropping the Dog summons the Annoying Dog beside the protagonist. The Annoying Dog then runs to the Legendary Artifact and absorbs it, while Dogsong plays. Shortly after, the Annoying Dog runs out through the walls out of the frame. Dog Residue is then left in the inventory.

Calling Toriel's phone when the Annoying Dog is in the inventory results in Toriel's phone ringing in the protagonist's inventory.

It is impossible to put the Annoying Dog into a box, as trying to use a Dimensional Box through the cell phone displays the text "The box is aclog with the hair of a dog." Leaving the room with the Annoying Dog still in the inventory makes it disappear until reentering. Though normally the dog can only be in the inventory in the artifact room and piano room, editing file0 allows the protagonist to have it in their inventory. If removed with file manipulation, attempting to take the artifact will display the message "This will never happen", after which the artifact stays on the stand, but says that it is gone.

If added to the inventory through file manipulation, the protagonist can sell the Annoying Dog at the Tem Shop for 999G and, if the Temmie Shopkeeper denies the sale, she negotiates the prices of 1251G. After negotiation, the Annoying Dog is the most valuable item in the game.

Nothing happens if the protagonist uses or drops the Annoying Dog outside of the artifact room.

Hard Mode

Main article: Hard Mode

After Toriel's boss battle, the Annoying Dog arrives and announces the end of Hard Mode, much to Toriel's displeasure. When it speaks, its text moves in place with a wave effect. It also interrupts Flowey when he is about to finish his line, "Don't you have anything better to do?" since it had already said that earlier. After its dialogue, the game restarts.

True Pacifist Route

The Annoying Dog appears on the ending screen, stays below the "THE END" text, and eventually falls asleep. It does not appear if the Genocide Route had previously been completed.

Minor encounters

• The Annoying Dog appears in the Settings menu with an object atop its head related to the season (except Summer where it "melts"), along with the Uwa!! tracks and while accompanying snow, leaves, and the sun.
• When the protagonist slides past a thick row of trees after the last puzzle before Snowdin, a snow sculpture appears on their head. This sculpture sometimes resembles the Annoying Dog.

The Annoying Dog sitting in the top right on Gyftrot.

• Gyftrot is sometimes decorated with an Annoying Dog.
• The protagonist sees the Annoying Dog's silhouette on the radar that shows up during the date with Papyrus.
• A framed picture in the Tem Shop portrays the Annoying Dog.
• The Annoying Dog hides in the bone drawer in Undyne's house.
• The protagonist can occasionally see the Dog's face on the front of the River Person's boat.
• Calling Papyrus near the L2 Elevator in Hotland causes him to mention a certain dog stealing his lasagna.
• During the MTT News Report, a building has the Annoying Dog's silhouette on top of it.
• When the protagonist is at Mettaton's colored-tile puzzle, repeatedly triggering the piranhas makes the dog appear in the water for a short moment.
• The protagonist can interact with the Annoying Dog through the right-most door in the east branch of the MTT Resort. When using a Hot Dog, Dog Residue, Dog Salad, or certain other dog items, unique dialogue appears and the protagonist can gain a Hush Puppy.
  • Putting a Hot Cat in front of the door causes the dog to growl at it and does not accept it.
  • Calling Papyrus in this area also causes the Annoying Dog to bark behind the door, provoking a surprised reaction from Papyrus upon calling him again.
• If the protagonist kills all the major bosses (Toriel, Papyrus, Undyne, and Mettaton) during a Neutral Route and has killed nobody else, during his phone call, Sans tells them that a small, white dog became the president of the underground and that this seems to be the best life for everyone.
• The Annoying Dog can be found in the room behind the mysterious door in Snowdin.
• The protagonist can see the Dog in the trash tornado in Sans's room on rare occasions.

The dog at the dump during Alphys's date.

• The protagonist can see the Annoying Dog on the left side of the garbage dump during Alphys's date.
• In the True Pacifist ending credits, the Annoying Dog is usually seen sticking out of Gyftrot's right antler tree.

Creation and development

The Annoying Dog was originally created during the development of Undertale as a result of Temmie Chang's fondness for dogs. According to Toby Fox, because Temmie Chang really loved dogs at the time, he came up with the idea of creating a dog-shaped character specifically to use for enemy attack patterns, which led to the creation of the Annoying Dog. Later in development, Annoying Dog became a representation of Toby Fox.

Outside of Undertale

UNDERTALE Alarm Clock

The Winter Dialogue for the UNDERTALE Alarm Clock was announced on Undertale's 5th Anniversary. The Annoying Dog is mentioned in two excerpts.

In Toriel's excerpts, she mentions that a dog has been sleeping on the vent. Sans jokingly assumes she would use her fire magic on the dog.

In Undyne's excerpts, the Annoying Dog suddenly appears and scores multiple goals during the hockey game. When the dog drops the puck in front of Papyrus, Undyne kicks it into the air, and the dog ascends after it.

Newsletter

Artwork for the newsletter announcement by Temmie Chang.

Various arts and sprites of the Annoying Dog is featured in the official Newsletter, all of which was created by Temmie Chang.

In the ISSUE 5 - Winter 2024 of the Newsletter, three random Valentine's Day cards were included in the email version of the Newsletter. However, the Annoying Dog is only mentioned in one of Papyrus's Valentines cards. In the common rarity card, Papyrus mentions that a dog had gotten ensnared in the string of a heart-shaped balloon.

Deltarune

Main article: Annoying Dog

In Deltarune, the Annoying Dog makes various appearances in each Chapter. On console versions, it appears in the loading screen and reuses the hanging animation seen in Papyrus's Gauntlet of Deadly Terror.

The Greatest Living Show

The Annoying Dog makes a cameo in the music video for The Greatest Living Show, as it is a collaboration project between Toby Fox and Itoki Hana, and was animated by BANI-chan. In the end credits, a top hat-wearing and heavily stylized Annoying Dog jumps around a trash can (who in it can be seen an illustrated Bani-Chan) and a flower (most likely representing Itoki Hana) and then falls over, smiling and wagging its tail. This music video was also announced in the ISSUE 2 - Spring 2023 Newsletter.

OFF

The dogfish cameo.

In the 2025 remaster of OFF, a green fish with the Annoying Dog's face and ears can appear at Zone 1.

Homestuck - The Animated Pilot

Portrait of Andrew Hussie with the Annoying Dog.

In the Homestuck animated pilot, a framed picture of Andrew Hussie can briefly be seen depicting him alongside the Annoying Dog.

Gallery

• 
  The Annoying Dog seen in Sans's room.
• 
  The Annoying Dog sleeping in the room behind the mysterious door.
• 
  The Annoying Dog Memory Foam Plush sold on Fangamer.
• 
  The Beauty Border, featuring muscular Annoying Dogs.
• 
  Artwork from Undertale's 5th anniversary.
• 
  The Annoying Dog as a bronze trophy for PlayStation versions of Undertale.
• 
  Ditto, but as a silver trophy.
• 
  Ditto, but as a gold trophy.
• 
  Ditto, but as a platinum trophy.
• 
  The Annoying Dog "poisoned" in the UNDERTALE 10th Anniversary Stream.
• 
  The Annoying Dog wearing a knight's helmet during the attacks of Abberant.

Trivia

• The Annoying Dog steals Toriel's phone if the protagonist waits for her in the hallway of the Ruins. While Toriel gets her phone back once the protagonist proceeds to the next room, the Annoying Dog apparently steals it again and eats it, as attempting to call her from the artifact room will result in ringing "coming from inside your inventory", where the Annoying Dog is.
• The sound effect used for the Annoying Dog first originated as a sound effect for Mario Paint.
• The Annoying Dog flying through the wall by ignoring the collision may be a reference to the Steam Greenlight trailer, which tells the viewer to not go into the artifact room because there is no collision yet.
• When talking to Bratty and Catty at the end of the True Pacifist Route, Catty mentions petting a "little white cat". Bratty then corrects Catty, saying it was a dog. It is most likely this dog was the Annoying Dog.
• The Annoying Dog appears to be a Pomeranian, as it is referred to as tinypom in the game files for the Demo - for instance, its walking sprite is labeled spr_tinypomwalk and its bark snd_pombark.
• Originally, if Undertale was beaten fast enough, the Annoying Dog would appear at the ending screen wearing a bikini. However, this did not make it into the final game. This references the Metroid series, where the main character, Samus Aran, wears a bikini if the game is completed fast enough.
• One of the Annoying Dog's lines at the end of the Hard Mode, "Don't you have anything better to do?", is a line occasionally said by Flowey as well as his true form Asriel. It is also the name of a PlayStation trophy in the PlayStation release of Undertale.
• Every "bad" post made by Toby Fox is canonically written by the Annoying Dog.
• A track titled "Bedroom for an Annoying Dog" appears in the Hiveswap: Act 1 soundtrack, composed by James Roach and Toby Fox. According to the developers, the title was chosen because Toby Fox was living in Andrew Hussie's basement while working on Undertale. Despite the name, the composers stated there is no direct Undertale reference in the scene.

See also

• Annoying Dog article on the Deltarune Wiki