According to auto correct…

Asgore's real name is Ashore

Mettaton is Me at on

Alphys is Alphabet

Sans is Sands

Papyrus is Paper us

Undyne is Urine (I can't even any more…)

Asriel is As real

Chara is Characters

Toriel is To girl

Gaster is Faster

Undertale is Undertake

Frisk is Trial (!?!?)

Napstablook is Naps tab look

And finally,

Flowey is Flowery

I can't even begin to describe the horrors of auto correct…