To play Undertale on Android today, you generally have three options: using a GBA/GBC demake ROM, using an unofficial native Android port, or emulating the PC/Console versions. 1. Game Boy / GBA Demakes (ROMs)
If you’d like, I can:
: A popular fan-game by developer loganvcairns that remakes iconic boss fights (like Sans, Toriel, and Papyrus) in a classic 8-bit style. undertale gba download android