The Annoying Dog is a small, white, smiling dog representing the creator of "Undertale", Toby Fox.
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.
Powers and Stats
Name: Annoying Dog, Toby Fox
Age: Trancends reality
Powers and Abilities: Reality Warping (Created multiple timeliness by accident), Space-Time Manipulation (Created multiple timelines by accident), Teleportation (Could appear in Frisk's inventory with no explanation), Possible 4th Wall Awareness, Can steal special attacks, Absorption, Intangibility, Being Really Annoying, Can't be fought, due to the fabric he stands on having too many holes in it
Attack Potency: Unknown (Was responsible for the creation of the Undertale Universe, although it was made via barking into a random text generator; it is unlikely that the dog itself maintains that level of power)
Speed: Unknown, Likely Infinite (Capable of moving even after the reality he is in crashed) Seems to be able to teleport anywhere at will
Lifting Strength: Unknown
Striking Strength: Unknown
Standard Equipment: Dog Residue
Weaknesses: Extremelly lazy