@shellyous Asgore, Toriel, Carol, some instances of the SOUL, Gerson, Alvin, Catti and Patty's parents (can't say for Catti specifically)...
Yeah that's all I can think of in DR.
@Kayliegal the mike fights at the end of chapter 4. and like one very minor npc in chapter 4
thats it. you might be able to play the switch 1 version on switch 2, but its 99% the same game. and i think if you buy one you get the other (correct me on this)