Undertale File Info

This Page Contains Info on How To Edit The Files Of Undertale.

To edit the Undertale files you need to go to your Undertale folder (com.tobyfox.undertale), to do this on OS X, you must open finder, then go to the top of your screen where it says "Go", then click "Go To Folder" and type in ~/Library, from there go to Application Support, and look for your Undertale folder (com.tobyfox.undertale) and go to "file0", there there is 549 lines, each with a number representing something, except the first line, which states your character's name. You can change any of these, but I would recommend to only change something if you know what it does. Once you have changed something, close, and reopen the game for it to work. Some key lines you will most likely want to know are lines 1, 2, 3, 4, 11, 13, 29, 30, 36, 548, and 549. The following list explains what each of those lines does, you can also find this information in the first link to the right. The other links will be helpful for learning this as well.

Important Lines in file0

Item Name Item ID Use
Bscotch Pie 11 Heals All HP
Nice Cream 17 Heals 15 HP
Instant Noodles 36 Heals HP
Legendary Hero 43 heals 40 HP
Burnt Pan 47 +4 ATK Dmg, +4 health from food
Temmie Armor 64 +20 DEF, other
Room Name Room ID Extra
The Begining 4 none
Home 31 Save
Snowdin Entrance 44 Entrance
Snowdin 68 Save/Shop
Cave to Waterfall 82 Entrance
Mettaton's House 121 None
Temmie Village 128 Save/Shop/Box
Undyne Arena 134 Undyne Boss Fight
Lab Entrance 139 Save
San's Hot Dog Stand 158 Shop
Art Club 160 Secret Boss - So Sorry
Spider Entrance 176 None
Hotel Lobby 183 Save/Shop
CORE Upper Elevator 210 Save
Last Corridor 231 Save/Box
True Lab Entrance 244 Entrance