guides in TS!UNDERSWAP

i heard people were having trouble interacting so ye for people who cant read game text 9a disorder i sadly have if text is on video game i cant comprehend it its a super real condition trust me) you have to get on and you need to press Z next to shift

I'm wondering how much names are easter eggs and which ones can/can't be used or just closes the game besides Gaster

(Spoilers for Starlight Isles. proceed with caution.)