TOBY FOX STATED HIMSELF THAT WHOEVER HAS THE MOST DETERMINATION CAN SAVE AND RESET, THAT'S HOW FLOWEY COULD DO SO BEFORE FRISK FELL UNDERGROUND. IN DELTARUNE, KRIS CAN SAVE AND RESET IN THE DARK WORLD. BUT NOT THE LIGHT WORLD. MEANING THERE'S SOMEONE WITH MORE DETERMINATION IN THE LIGHT WORLD WHO COULD ALSO BE A POSSIBLE BOSS FIGHT IN FUTURE CHAPTERS OR SOMETHING IDK. I'VE BEEN THINKING ABOUT THIS ALL DAY AT SCHOOL AND JUST REMEMBERED TO WRITE IT DOWN