in most countries. This guide assumes you only download free, fan-created homebrew or dump your own legally purchased copies.
: Users on RetroAchievements recommend using the NooDS emulator or real hardware for the best experience, as standard emulators like MelonDS can struggle with performance. Better Alternatives: 3DS and Handheld Ports
There is no official Undertale DS version released by Toby Fox. Any “Undertale DS ROM” circulating online would be a fan-made port or a hacked reproduction, not a legitimate Nintendo DS game.