The Terrific Book/Meh Random Stuff

17

This is a sound file you can't find in the game called abc_123_a, play it!
And all of those monsters speaking are gastors followers and can be found in the genocide route
And also gastors room where you can find a ghost of Dr W.D Gaster
And if you type down Gaster for your name, it will immediately restart
You might already know this
Thats probably why number 17 is so important