- For the type of monster, see Boss Monster.
List of Bosses
Neutral Route
Toriel
Papyrus
Undyne
Mettaton
Asgore
Photoshop Flowey
True Pacifist Route
Asriel Dreemurr
Genocide Route
Undyne the Undying
Mettaton NEO
Sans
List of Midbosses and Minibosses
Napstablook
Doggo
Dogi
Greater Dog
Shyren
Mad Dummy
Royal Guards
Muffet
Amalgamates
So Sorry
Glyde
Mad Mew Mew
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