Oh gosh
Ok
Original character-replacing character
Kris-Tenna
Susie-Spamton
Ralsei-Ralsei
Tenna-Jackenstein
Mike-Jackensteins pumpkin(s)
Spamton-Ramb
Jevil-Napstablook
Knight-Azzy
Gerson-Sans
Hammer of justice-Papyrus
Possible ones (not confirmed)
Lancer-Alvin
King-Gerson
Rouxls-seam