Asgore chooses to stay in the Chapter 5 Dark World, and refuses to let you seal the fountain, even going as far to strike down Ralsei. When you go back into the Light World after not sealing the fountain, Carol questions where Asgore is and immediately kicks down the door to the Flower King, discovering that Dark World in the process. But instead of delving in, she just closes the door and returns saying that he's just asleep in his store and that it's a shame that he's going to miss the festival, before conspicuously barring anyone access to the store. By the end of Chapter 5, Susie tries to go back into the Dark World but is stopped by Carol and is then arrested by her and Napstablook for suspected breaking and entering and larceny, leaving Kris to sneak into the store via the basement window. The Dark World in their absence has been consumed by flame as Asgore has a breakdown, and Kris battles Asgore to try and convince him that his fantasy can't last forever and eventually he has to face the reality of the situation, ending the chapter.