Goner Kid
Have you ever thought about a world where everything is exactly the same...
Except you don't exist?Goner Kid
Goner Kid[note 1] is a minor character in Undertale. They are located at the end of Waterfall's raft dock only if the fun value is 90 or greater.

Goner Kid resembles an armless reptilian monster who bears a strong resemblance to Monster Kid. They are entirely grayscale, and their eyes lack visible pupils. They appear to wear a striped shirt.
They seem not to have a full set of spines on their head, only having two, and these spines appear mirrored compared to monster kid. They have two lines in the back of their head. The pattern on their shirt doesn't seem to match monster kid's stripes, and resembles a ribcage and spine.
Goner Kid is terrified at the idea of a world that functions as is without them. However, when speaking to them with an umbrella, they begin to feel better about their thoughts, and they insist the protagonist forget about them.
Goner Kid only appears after returning to the raft dock from the boardwalks. They are seen looking out at the water and speak of the possibility of somebody's existence being so insignificant that the world would be unchanged if they did not exist.[1] If the protagonist is carrying an umbrella, Goner Kid's fears seem to be soothed by the sight of somebody using it despite the lack of rain, and they thank the protagonist and implore they forget about them.[2]
When spoken to with the Debug mode enabled, they say something completely different echoing a Monster Kid's dialogue.[3][4]
Goner Kid resets the fun value to 0 when talked to with an umbrella, and they no longer reappear when returning to the room.
- ↑ Internally referred to as
spr_mkid_gonerin the game files andobj_mkid_gonerin the game object references, but this character is not named in game.
- ↑
Have you ever thought about a world where everything is exactly the same...
— Goner Kid
Except you don't exist?
Everything functions perfectly without you...
Ha, ha... The thought terrifies me. - ↑
An umbrella...? But it's not raining.
— Goner Kid
Ha, ha...
You know, that does make me feel a little better about this.
Thank you.
Please forget about me. - ↑
Yo! You're a ??? too, right?
— Goner Kid in Debug Mode - ↑
Yo! You're a kid too, right?
— Monster Kid