Characters
The only character to never speak in lowercase.
Who is Papyrus?
A location that can only be entered on console versions of the game.
The dog shrine/casino
The only song in the Undertale OST that goes unused in-game.
What is "Song That Might Play When You Fight Sans"?
The only item in the game that will have a decreased price depending on how many times you have died.
What is Temmie Armor?
The creator of the CORE.
Who is W.D. Gaster?
The only fight exclusive to one version of the game.
What is Mad Mew Mew?
A place in waterfall where you can encounter more than one enemy at once without having to actually fight them.
What is the quiet area?
The name of the song that gave birth to Megalovania, made by Toby Fox for an Earthbound album.
What is "Megalo Strikes Back"?
The only item ingame that will heal a different amount depending on your current HP.
What is Bad Memory?
The location where Alphys and Undyne first met.
What is the Garbage Dump?
A character that gives hints and references to various things in the game.
Who is the river person?
The only other location than the art club that has magic glass that the player can walk on.
What is the MTT Resort?
The song with the most motifs present within one song.
What is "Bring It In, Guys!"?
The only weapon in the game that can be used to impact multiple bossfights.
What is the stick?
The character that will become the ruler in the neutral ending if you abort the genocide route in Hotland.
Who is Alphys?
A character with a low chance of appearing, and an even lower chance of disappearing when they finish talking to you.
Who is clam girl?
A room directly before a room with three possible variations, depending on FUN value.
What is the crystal room?
The original song that Mettaton's theme (metal crusher) took the motif of.
What is "Noisemaster's Theme"?
The only item in the game that can only be obtained by dropping another item.
What is Undyne's Letter EX?
What Alphys used to collect the Determination from the 6 other fallen human SOULs.
What is the DT Extraction Machine?
An enemy that can only be encountered if you kill a specific different enemy.
Who is Chilldrake?
The room number for a removed room with a girl bug hunting in the tall grass, who mentions a person standing behind you with a creepy smile.
What is room 123?
The only song by Toby Fox in the "I Miss You" Earthbound album that made it into Undertale.
What is "Fallen Down"?
The only unused item that can be obtained without editing the save file (via glitches).
What is Rock Candy?
The most powerful character in the Undertale universe.
What is The Annoying Dog?