These are the characters in my Undertale AU, Underule. If you don't know any of them look them up. The humans' roles are unchanged.
Flowey/Asriel Dreemurr - Deku (Link)/Link Dreemurr.
Toriel - Nayru
Asgore - Ralph
sans - vaati
PAPYRUS - DARK LINK
Temmie - Remlit (referred to as Remmie)
Muffet - Veran
Grillby - Volga
Undyne - Cia
Alphys - Lana
MTT - Ghirahim
Napstablook - Flat
This is confusing but, hey, it works. I also may have to skip some scenes.