Questions in UNDERTALE

Next Soup'd Up! 2

is sans someone important in the underground? cuz he has his own sentry point places like the dog guards in snowdin and undyne gets angry when she sees sans sleeping in hotlands

but most importantly he has his own church

is he like a retired royal guard?

Which one of these projects should I focus on and possibly make a trailer for underevent plus this is a reveal for a outertale themed deltarune mod

Which of these Swap Sans do you prefer?

Which one do y'all like better?

Here’s a physical version of a small marketable version of Martlet that I call Smallrtlet now you can easily tell how to make the bead pattern and now for the poll for who from underswap yellow I should make into a marketable bead next

У меня в планах нарисовать персонажей undertale yellow в стиле underfell но вопрос в том есть ли в этом толк ? // I have plans to draw undertale yellow characters in the underfell style, but the question is, is there any point in this? //

Ok I gotta ask: Does Undertale Yellow's Genocide route cause any permanent changes to future runs? I just haven't seen anything about it from just scrolling across sites.
Also if there are don't tell me exactly what, I wanna figure it myself >:)