Code "Fir" gives you a monster of a surprise. Anyways, code "Halloween" gives you a Seth Entombed and Eirika Mouthe Doog, although, good luck hitting anything. Really, just, try random words and letters and you'll eventually find something.
Chapter 9 of Eirika's route, there's a glitch where you can't bypass the enemies remaining counter. The counter reads 0, yet, the chapter isn't done. Is there a way to fix this or is this something that needs fixed?