Okay so there's this common problem with deltarune fics where there's always this massive gaping plot hole about the fact that the dark worlds exist in a vacuum separated from the real world and they disappear. This is obviously a problem when you want to keep the setting of the dark world (cyber world/forest/church/livingroom) for the plot of a fanfiction in which the characters live in the setting for a long period of time (more than several hours, which is how long the dark worlds last)
I petition that it become a common headcanon that castletown has sections added onto the city with each new batch of dark world immigrants, like a new York collecting ethnic neighborhoods over time. This way if you want to, say, have a slow burn set in cyber city; you can!
