Alphys and metatton live in
Hotland
Skeleton that makes puns
sans.
Hardest boss in game
Sans
Hidden unless you are lucky
gaster, and other grey charecters
Normal
Red
Undyne lives in
Waterfall
Younger brother skeleton
Papyrus
Second hard boss
Undyne the undying
Secret boss is in
hotland
Gravity
Blue
Asgore lives in
The barrier
The dreemurr family
Asriel dreemurr, Asgore dreemurr, Toriel dreemurr, and chara (Who is not an official part of the family but still)
Pacifest route only boss
Asriel dreemurr
Mad mew mew is in sans house to fight if you have
Shooting
yellow
Toriel lives in
The ruins
The fish
Undyne
Rule-breaker boss
Omega flowey
Temmie armor is can be bought if what is bought
Temmies collage
Spider web
purple
Sans and papyrus live in
Snowdin
The robot
Mettaton
His new body is fabulous
Mettaton ex
Dog poo can be multiplyed?
Yes
Green
Lost soul (Not a style lol)