@SarcasticCinnamonBun probably after it your Frisk would have to go off and kill something so they can relieve some stress or smth;;;;
ALRIGHT BUT IMAGINE THIS:
They go it together but due to different runs, they cannot be at the same place at the same time, so like, your Frisk goes first, kills everything and then when my Frisk comes along, everything in that area resets itself and when they go together, random encounters would separate them and its all confusing but then they just continue on for shops like, its the same, they get separated unless its tem shop then yeah
unless they just see different and during fights they cant see eachother`s moves
:^)