How to compliment the boss monsters

Napstablook: Say his hat looks amazing
Toriel: Say that her cooking skills are great
Sans: Say his puns are funny
Papyrus: Say his puzzles are very interesting
Mad Dummy: Not a f*cking clue.
Undine- I mean Undyne: Tell her that she is super powerful
Alphys: Tell her that she is really smart
Mettatton: Just... say.... legs.... and that she is GLAMORUS
Asgore: Tell him his paintings are superb
Did I forget anyone