To understand the appeal of this mod, one must first understand the original artistic intent. Toby Fox designed Undertale with a limited color palette for the overworld and sprites. This was partly a stylistic homage to the Game Boy era of RPGs and partly a practical choice for a solo developer using simple tools. In the vanilla game, color is reserved for specific narrative moments—the red of a saving point, the soul modes in combat, and the emotional flashes during boss fights.
is frequently patched into the Switch version to run on Android-based emulators. Repackaging APKs Undertale Colored Sprite Mod Android