To avoid piracy and ensure you are getting the safest, most updated version, you should use the official homebrew repositories rather than random ROM-hosting sites. 1. Requirements
There are two primary ways to experience Undertale on Nintendo handhelds via homebrew:
If you are looking for the best way to get Undertale running on your DS, here is everything you need to know about the top projects, how to download them, and what to expect from the experience. Is There an Official Undertale DS ROM? undertale ds rom better download
It is a work-in-progress (WIP). Recent builds include the intro cutscene, player movement, the first few rooms of the Ruins, and encounters like Flowey.
No, Toby Fox has not officially released Undertale for the Nintendo DS. The game is officially available on PC, PlayStation 4, PlayStation Vita, Nintendo Switch, and Xbox One. Any "Undertale DS ROM" you find online is a fan-made homebrew project or a "demake" designed to run on the DS’s more limited hardware. The Best Undertale DS Homebrew Projects To avoid piracy and ensure you are getting
If you have a Nintendo 3DS, this project is often considered "better" because it is a more faithful port of the original PC game rather than a demake.
It targets a stable 30 FPS on both Old and New 3DS models. How to Download and Install "Undertale DS" Is There an Official Undertale DS ROM
Uses the dual screens for dialogue and world-building.